TL-310A Flail Mower Gearbox Ratio 1:3 Replacement for Comer TL-310A Gearbox

Perumahan

The housing is the main structural body of the gearbox, cast from GGG40 ductile iron for maximum impact resistance and rigidity. It serves as the mounting interface that bolts the gearbox to the mower frame, and its internal machined surfaces locate the bearings and gear shafts at precise center distances. The housing also forms the sealed oil reservoir, with gasket surfaces and bolt patterns engineered to prevent leaks under vibration and thermal cycling.

Aci Input

The input shaft transfers rotational energy from the tractor PTO driveline into the gearbox through a 1"3/8 Z-6 spline connection. It is machined from high-carbon alloy steel and heat-treated for surface hardness, allowing it to handle the full 22.1 kW of input power at 540 RPM without deformation. The spline profile matches international PTO standards, so the shaft engages directly with the PTO driveline yoke for secure, slip-free torque transfer.

Gear

The TL-310A uses a pair of interlocking bevel gears in a 21-22 tooth arrangement to convert the PTO input into a 1:3 speed-increasing output. These gears are manufactured from case-hardened alloy steel and finished through precision grinding to tight tooth profile tolerances. The hardened tooth surfaces resist pitting, scoring, and fatigue under sustained high-load operation, while the controlled backlash between tooth pairs reduces vibration and noise during engagement.

Bearing

Tapered roller bearings support both the input and output shafts, handling the combined radial loads from gear mesh forces and axial loads from bevel gear thrust. These bearings are pre-loaded during assembly to eliminate shaft play and maintain accurate gear alignment over thousands of operating hours. Quality flail mower gearbox bearings are essential to smooth operation; worn bearings allow shaft deflection that accelerates gear tooth wear and can lead to housing damage if left unchecked.

Aci Keluaran

The output shaft drives the flail mower rotor at the adjusted speed and torque, connecting to the drum through a splined or keyed coupling. On the TL-310A, the output shaft carries a 1"3/8 Z-6 spline that engages with the rotor hub. The shaft is supported by bearings at both ends and transmits up to 126 N.m of torque to the cutting elements, providing the rotational force needed to shred grass, weeds, and brush during field operation.

Meterai

Oil seals at each shaft opening prevent the ingress of dirt, moisture, and grass fibers into the gearbox while retaining lubricant inside the housing. The TL-310A uses double-lip seals with a dust exclusion profile that is particularly effective in the abrasive conditions typical of agricultural mowing. Replacing worn flail mower gearbox oil seal components at scheduled intervals is one of the most cost-effective maintenance steps to prevent premature bearing and gear failure.

Ventilasi Pernafasan

A small breather vent on the housing equalizes internal air pressure as the gearbox heats up during operation and cools down afterward. Without a breather, rising internal pressure could force oil past the shaft seals, while a vacuum during cooling could draw in contaminated air. The vent incorporates a filter element that blocks fine dust particles while allowing air exchange, maintaining the sealed integrity of the oil bath and supporting long-term component cleanliness inside the gearbox.

Flail Mower Gearbox Manufacturing Process

1. Pattern Making and Casting
Production begins with precision pattern making for the GGG40 cast iron housing. Sand molds are formed from these patterns, and molten ductile iron is poured at controlled temperatures to achieve the correct graphite nodule structure. After cooling, castings are cleaned by shot blasting to remove surface scale and sand residue, then inspected for porosity, cracks, and dimensional accuracy before moving to machining.

2. CNC Machining of Housing
Raw castings are loaded onto CNC machining centers where bearing bores, shaft openings, mounting bolt holes, and gasket surfaces are cut to tight tolerances. Multi-axis machining in a single setup maintains the critical relationship between bearing bore centerlines and mounting faces. This precision directly affects gear mesh alignment, noise levels, and bearing life in the finished flail mower gearbox assembly.

3. Gear Blank Forging and Machining
Gear blanks start as forged alloy steel billets, which are rough-turned on CNC lathes to establish outer diameter, bore, and face dimensions. Gear teeth are then cut using hobbing or shaping machines programmed to the 21-22 tooth profile specification. Each gear undergoes deburring and dimensional inspection to verify tooth spacing, pitch diameter, and runout before moving to the heat treatment stage.

4. Heat Treatment
Cut gears and shafts go through a carburizing or induction hardening process that creates a hard, wear-resistant surface layer while keeping the core tough and shock-absorbing. Temperature, carbon potential, and quench parameters are monitored throughout the cycle. After hardening, parts are tempered to reduce residual stress and achieve the target surface hardness (typically 58-62 HRC on tooth flanks), which is verified by hardness testing on every production batch.

5. Gear Grinding and Finishing
After heat treatment, gears are finish-ground on CNC gear grinding machines to correct any minor distortion from the hardening process and achieve the final tooth profile accuracy. This grinding step produces a smooth surface finish that reduces friction, noise, and heat generation during operation. Ground gears also exhibit more uniform load distribution across the tooth face, which directly extends gear life under the continuous loading typical of flail mowing work.

6. Shaft Manufacturing
Input and output shafts are CNC-turned from alloy steel bar stock, with spline profiles cut by broaching or hobbing to the 1"3/8 Z-6 specification. Bearing journals are ground to the precise diameter and surface finish required for interference or transition fits with the selected tapered roller bearings. Seal grooves and keyways are also machined at this stage, and each shaft is individually inspected for concentricity and spline accuracy.

7. Assembly and Testing
Gears, bearings, seals, and shafts are assembled into the machined housing following a controlled build sequence. Bearing preload is set using calibrated shims, and gear backlash is measured with dial indicators to verify proper mesh. Once assembled, each gearbox undergoes a run-in test on a dedicated test bench where input speed, output torque, noise level, vibration, and oil seal integrity are checked against pass/fail criteria before the unit is approved for shipment.

8. Quality Control and Packaging
Final quality control includes visual inspection of paint finish, labeling accuracy, and bolt torque verification. Dimensional spot checks against engineering drawings are performed on a statistical sampling basis. Approved units are treated with a rust-preventive coating on exposed machined surfaces, fitted with protective shaft caps, and packed in reinforced cartons or wooden crates sized for safe ocean freight and warehouse stacking. Every shipment includes a test report and installation guide.

How to Choose the Right Gearbox for Flail Mower

1. Start with Your Tractor and Mower Specifications
Before selecting a flail mower gearbox, collect the main operating parameters: tractor PTO power and speed, mower working width, required rotor speed, input and output shaft specifications, and mounting position. These parameters determine the speed, torque, and installation requirements of the gearbox. Two tractors with similar power may still require different gearbox configurations because mower width, flail arrangement, rotor speed, and vegetation resistance can vary significantly between models and applications.

2. Padankan Kotak Gear dengan Kuasa Traktor
Tractor horsepower is an important reference, but the gearbox should be matched to the power actually transmitted through the PTO and the load generated by the mower. An undersized gearbox may experience excessive heat, bearing wear, gear damage, or shortened service life. An unnecessarily large gearbox adds weight, cost, and installation difficulty. When requesting a recommendation, provide tractor power, PTO information, mower width, and operating conditions rather than horsepower alone.

3. Sahkan Kelajuan PTO
PTO speed is one of the most important specifications for a flail mower PTO gearbox. Many agricultural implements operate with standard PTO inputs such as 540 RPM or 1000 RPM. The gearbox converts this input into the output speed required by the mower rotor. Before selecting a gearbox, confirm the PTO input speed, the gearbox rated input speed, required output speed, and rotation direction. Two gearboxes with similar external dimensions may produce very different rotor speeds if their internal ratios differ.

4. Pilih Nisbah Gear yang Betul
The flail mower gearbox ratio determines the relationship between input and output speed (Gear Ratio = Input Speed / Output Speed). However, the final ratio should also consider rotor diameter, flail configuration, cutting height, vegetation resistance, tractor power, and working speed. A higher rotor speed is not always suitable; thick vegetation and heavy ground cover increase load, so speed and torque should be evaluated together before committing to a specific ratio.

5. Consider Mower Working Width
Mower working width directly affects transmission load. A narrow flail mower used behind a compact tractor generally places less load on the drivetrain than a wider implement operating under the same PTO conditions. As working width increases, more flails engage vegetation at the same time, increasing resistance on the gearbox. The gearbox, rotor, shafts, and PTO system should be matched as one transmission system. Always provide the actual mower working width when selecting a gearbox.

6. Match the Gearbox to Vegetation Conditions
Vegetation conditions significantly change gearbox load. Light grass creates stable resistance, while bramble, brush, and crop stubble increase flail resistance and require greater torque. Frozen or dry vegetation can create repeated impact loads as flails strike through brittle material. If the same mower will be used in different regions or across different seasons, gearbox selection should account for the most demanding expected vegetation conditions to avoid overloading and premature wear.

7. Periksa Keserasian Aci dan Spline
Even when power and ratio are correct, the gearbox cannot be installed properly if the shaft configuration does not match the machine. Confirm input shaft diameter, output shaft diameter, spline specification, keyway dimensions, shaft length, shaft orientation, and rotation direction. For OEM or flail mower gearbox replacement projects, technical drawings, existing gearbox samples, or detailed dimensions can improve model matching and reduce the risk of ordering errors.

8. Check Mounting Dimensions
Compact flail mowers often have limited installation space inside the mower housing. Before ordering, confirm the mounting hole pattern, center distance, housing dimensions, input and output shaft positions, installation direction, and available clearance. A gearbox with the correct ratio and power rating may still be unsuitable if the mounting structure does not match the mower frame. Contact CMN Transmission with your mower model details for a precise fit recommendation.

Flail Mower Gearbox vs. Lawn Mower Gearbox

Apakah Kotak Gear Pemotong Rumput Flail?

A flail mower gearbox is a mechanical transmission unit designed specifically for flail-type cutting machinery used in agriculture, municipal maintenance, and land management. It receives rotational power from the tractor's PTO (commonly at 540 RPM) and transmits it to the flail rotor while adjusting speed and torque to match the cutting task. Internal gear systems regulate the power flow to suit different crop residues, grass heights, and terrain conditions. Heavy-duty construction using cast iron housings, hardened steel gears, and sealed bearings delivers the long-term reliability demanded by professional operators who run their equipment hundreds of hours per season.

Kelebihan Kotak Gear Pemotong Rumput Flail

• Fine Mulching Action: The flail rotor configuration, powered through the gearbox's optimized ratio, shreds vegetation into small pieces that decompose rapidly on the ground surface, eliminating the need for collection passes and returning organic matter to the soil.
• Safe Debris Handling: Flail mowers throw far less debris sideways compared to open-blade rotary cutters, making flail mower gearbox-driven systems safer for use near roads, buildings, parked vehicles, and pedestrians.
• Versatile Cutting Range: By changing flail types (Y-blades, hammers, scarifier tips), a single gearbox serves grass mowing, brush clearing, stubble chopping, and even light soil scarification tasks across different seasons.
• Durability in Rough Terrain: The heavy duty flail mower gearbox tolerates rocky, uneven, and debris-laden ground conditions that would damage lighter mowing equipment, making it the preferred choice for agricultural and municipal professionals.

Aplikasi Kotak Gear Pemotong Rumput Flail

• Pasture and Grassland Management: Maintaining even grazing surfaces on livestock farms and dairy operations by mulching overgrown grass, thistles, and dock weeds without leaving bulky windrows.
• Roadside Verge Mowing: Municipal and highway maintenance teams rely on flail mower gearboxes to power mowers that keep roadsides clear and safe for traffic visibility.
• Orchard and Vineyard Floor Care: Controlling inter-row vegetation while protecting crop plants, irrigation lines, and trellis structures from contact damage.
• Pengurusan Sisa Tanaman: Shredding corn stalks, cereal stubble, and cover crop biomass before tillage or planting operations to speed decomposition and improve seedbed preparation.

Apakah Kotak Gear Pemotong Rumput?

A tractor PTO-driven lawn mower gearbox is a vital component in agricultural and landscaping equipment, providing efficient grass cutting over large areas. Connected to a tractor's PTO shaft, it transfers and adjusts engine power to the mower blades, providing the speed and torque needed for effective mowing. Made from strong materials like cast iron or aluminum, the gearbox is built to handle harsh outdoor environments and the heavy workload of mowing. Inside, the gears are carefully designed to adjust the speed for smooth and even cutting. Maintenance is straightforward with simple access for oiling and seals that keep out dirt and debris. Its durable design allows it to work well on different types of ground and grass, making it versatile for lawn care professionals and farm operators alike.

Kelebihan Kotak Gear Pemotong Rumput

• High Blade Speed for Clean Cuts: Lawn mower gearboxes typically drive spinning blades at very high tip speeds, producing a clean, scissors-like cut on turf grass that promotes healthy regrowth and attractive appearance.
• Wide Cutting Deck Coverage: Multi-spindle configurations powered through the gearbox can drive several blades at once across wide decks, allowing large areas to be mowed in fewer passes.
• Simpler Blade Replacement: Rotary blades bolt directly to the gearbox spindle, making replacement fast and inexpensive compared to swapping individual flails on a flail mower drum.
• Pembinaan Ringan: Lawn mower gearboxes are often built with aluminum housings, reducing overall mower weight and fuel consumption during extended mowing sessions on flat ground.

Aplikasi Kotak Gear Pemotong Rumput

• Pemotongan Rumput: Primarily used for cutting grass on large areas such as parks, golf courses, and residential lawns, producing a uniform and clean finish to maintain the appearance and health of the turf.
• Penyelenggaraan Belukar dan Pokok Renek: Equipped to handle thicker vegetation like bushes and small shrubs, these gearboxes help manage overgrowth and maintain clear paths in fields and gardens.
• Dusun dan Ladang Anggur: Controlling undergrowth in orchards and vineyards, keeping grass and weeds in check, reducing competition for nutrients and minimizing pest habitat.
• Tumbuhan Tepi Jalan: Used in roadside mowers to manage grass and brush along highways and streets, improving visibility and preventing wildlife from entering roads.
• Landskap Profesional: For landscapers, the gearbox provides precise control needed for shaping and cutting diverse landscapes, creating aesthetically pleasing environments in parks, estates, and urban areas.

Jadual Perbandingan

Flail Mower Gearbox and PTO Driveline Shaft

The flail mower gearbox and the PTO driveline shaft work as a connected pair to deliver tractor power to the mower's cutting rotor. Neither component functions without the other: the driveline shaft carries rotational energy from the tractor's PTO stub to the gearbox input, and the gearbox then adjusts that energy to the speed and torque the flail drum requires.

A PTO driveline shaft for a flail mower is a mechanical driveline that transfers rotational power from a tractor's Power Take-Off output to the mower's gearbox input, driving the cutting rotor and flail blades. It typically features universal joints at each end that allow the shaft to operate at varying angles as the mower follows terrain contours behind the tractor. A telescopic section between the joints lets the shaft extend and compress as the distance between tractor and mower changes during turns and over uneven ground. Protective guards enclose the spinning shaft and joints to prevent contact with clothing or limbs, meeting safety regulations across all major agricultural markets.

The splined connections at each end of the Aci pemacu PTO must match both the tractor PTO stub and the gearbox input shaft. For the TL-310A, the input connection is a standard 1"3/8 Z-6 spline, which is the most common PTO spline profile in agricultural machinery worldwide. Correct spline engagement is critical because a loose or mismatched connection causes accelerated wear on both the driveline yoke and the gearbox input shaft, eventually leading to spline failure and power loss during operation.

Proper shaft sizing and torque capacity matter as much as spline compatibility. The driveline shaft must be rated to handle at least the same torque as the gearbox's maximum input, which for the TL-310A is 22.1 kW at 540 RPM. An undersized shaft will fatigue prematurely, while an oversized one adds unnecessary weight. The operating angle between the driveline and the gearbox input shaft should remain within the universal joint's rated range (typically under 25 degrees) to prevent excessive vibration, accelerated joint wear, and power transmission losses. Keeping the tractor's three-point hitch at the correct height helps maintain safe operating angles across different terrain conditions.

Many driveline shafts include a shear bolt or friction clutch as an overload protection device. When the flail rotor hits a solid object like a large rock or fence post, the sudden torque spike can exceed the gearbox's capacity. The overload device in the driveline absorbs this spike by shearing a replaceable bolt or slipping the clutch, protecting both the gearbox gears and the tractor's own PTO system from costly damage. Combined with the free-wheel mechanism built into gearboxes like the TL-310A, this creates a two-stage protection system that covers both overload events and sudden PTO disconnection.

Why Choose CMN Transmission's Flail Mower Gearboxes?

Korea CMN Transmission Co., Ltd. was established in 2000 and is located in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, Korea. With over 100 factory employees, CMN Transmission is dedicated to the research, development, manufacturing, sales, and service of agricultural gearboxes. Over the past two decades, CMN Transmission has grown into a trusted supplier in the global agricultural gearbox industry, exporting to more than 60 destinations worldwide, including the United States, Canada, Mexico, Brazil, Argentina, France, Germany, Italy, Spain, the United Kingdom, Russia, China, India, Thailand, Vietnam, Turkey, Australia, and New Zealand.

Our product range covers rotary cutter gearboxes, rotary tiller gearboxes, feed mixer gearboxes, rotary mower gearboxes, fertilizer spreader gearboxes, flail mower gearboxes, post hole digger gearboxes, round baler gearboxes, square baler gearboxes, disc mower gearboxes, center pivot irrigation gearboxes, hydraulic drive gearboxes, silage machine gearboxes, orchard sprayer gearboxes, rotary rake gearboxes, combine harvester gearboxes, grain storage gearboxes, grain transportation gearboxes, corn headers gearboxes, cutting bar gearboxes, poultry feeding gearboxes, and custom agricultural gearbox designs covering nearly one thousand specifications. These products are widely used in grain harvesting equipment, forage machinery, mowers, balers, rakes, rotary tillers, fertilizer spreaders, sprayers, feed mixers, silage machines, and combine harvesters. Our additional product range includes PTO shafts, U-joints, yokes, tubes, torque limiters, covers, adapters, couplings, bearings, blades, chains, and sprockets.

With an annual production quantity exceeding 500,000 units, CMN Transmission consistently delivers reliable performance and long-term durability for global OEMs and distributors. Our products are manufactured under CE and ISO 9001 certified management systems, with strict quality control at every stage from raw material inspection through final assembly and testing. This commitment to quality is why agricultural machinery manufacturers across six continents trust CMN Transmission as their preferred gearbox supplier.

When you choose a CMN Transmission flail mower gearbox, you benefit from decades of specialized manufacturing experience, competitive factory-direct pricing without middleman markups, and a technical support team that understands the real-world demands of agricultural mowing equipment. We support custom production based on customer drawings and specifications for agricultural gearboxes, PTO shafts, and various agricultural machinery components. Whether you need a single flail mower gearbox replacement for a machine in the field or a container load of gearboxes for OEM production, CMN Transmission has the capacity, expertise, and inventory to deliver on time and on specification.

Contact us today through our contact us page or request a quote directly on the product page. Our sales and engineering teams are ready to help you find the right gearbox solution for your flail mower application, whether it is a standard catalog model or a fully customized design built to your specifications.

Soalan Lazim

Q: Is the TL-310A a direct fit replacement for the Comer TL-310A flail mower gearbox?
A: Yes. The TL-310A is engineered as a bolt-on Comer flail mower gearbox replacement. It matches the original Comer TL-310A in all critical dimensions, including mounting bolt pattern, input and output spline profiles (1"3/8 Z-6), housing footprint, and shaft centerline positions. You can install it on your existing mower frame without modifications to the bracket, driveline, or rotor assembly.

Q: What type of oil should I use in a flail mower gearbox?
A: The TL-310A requires SAE 80W-90 gear oil, which is the standard viscosity grade recommended for most agricultural flail mower gearbox oil applications. Fill the gearbox with up to 0.8 liters of oil before first use, as the unit ships dry. Use a quality EP (extreme pressure) gear oil from a reputable lubricant brand. Avoid mixing different oil types or using engine oil as a substitute, as the additive packages differ.

Q: How often should I change the oil in my flail mower gearbox?
A: Perform the first oil change after 50 to 70 operating hours to flush out any initial break-in particles from the gears and bearings. After that, change the oil every 500 to 700 operating hours, or at least once a year if you do not reach that hour count. Always check the oil level before each use and inspect the drained oil for metal particles, which can indicate internal wear that needs attention before it becomes a larger issue.

Q: What does the 1:3 gear ratio mean for my flail mower?
A: The 1:3 ratio means the output shaft rotates three times for every one rotation of the input shaft. With a standard 540 RPM PTO input, the output shaft delivers approximately 1,620 RPM to the flail rotor drum. This speed-increasing arrangement is typical for flail mowers because the cutting elements need high rotational velocity to effectively shred vegetation. The trade-off is lower torque at the output, but the TL-310A still delivers 126 N.m, which is sufficient for medium-duty mowing applications.

Q: Can I use this gearbox with a 1000 RPM PTO tractor?
A: The TL-310A is rated for a maximum input speed of 540 RPM. Running it at 1000 RPM would exceed the rated bearing speeds and gear tooth velocities, leading to overheating, accelerated wear, and potential failure. If your tractor operates at 1000 RPM PTO speed, contact CMN Transmission to discuss a gearbox model designed for that input speed, or consider using a PTO speed reducer between the tractor and the driveline shaft to bring the input down to 540 RPM.

Q: What is the free-wheel mechanism and why does my flail mower gearbox need one?
A: The free-wheel (also called an overrunning clutch) allows the output shaft to continue spinning freely when the PTO is disengaged. This prevents the heavy spinning flail rotor from feeding energy back through the gearbox and into the tractor driveline, which could damage gears, splines, or the tractor's own PTO components. The TL-310A includes a free-wheel as standard, protecting both the gearbox and your tractor from shock loads during sudden stops.

Q: How do I know when my flail mower gearbox needs repair or replacement?
A: Common signs that indicate flail mower gearbox repair is needed include unusual noise (grinding, whining, or knocking), oil leaking from seals or housing joints, excessive vibration through the mower frame, difficulty engaging the PTO, or visible metal particles in the drained oil. If you notice any of these symptoms, stop operating and inspect the gearbox before further damage occurs. Catching problems early can save you from a complete gearbox replacement.

Q: Does CMN Transmission offer flail mower gearboxes for sale in other ratios?
A: Yes. In addition to the TL-310A with its 1:3 ratio, CMN Transmission manufactures a full range of flail mower gearboxes for sale covering various ratios, power ratings, and mounting configurations. We also offer custom production based on customer drawings and specifications. Contact our engineering team with your application details and we will recommend the best-fit model or develop a custom solution for your specific requirements.

Q: Can I use this gearbox on a 3 point hitch flail mower?
A: Absolutely. The TL-310A is commonly installed on 3 point flail mower gearbox applications where the mower attaches to the tractor through the three-point hitch linkage. The standard mounting dimensions and spline profiles make it compatible with most three-point mounted flail mowers that originally used the Comer TL-310A or equivalent gearbox. Check the mounting bolt pattern and shaft specifications against your mower before ordering.

Q: Where can I find other flail mower gearbox parts and accessories?
A: CMN Transmission supplies a complete range of flail mower gearbox parts including replacement seals, bearings, gears, shafts, and breather vents for the TL-310A and other models. We also offer matched PTO driveline shafts, universal joints, yokes, and torque limiters. Having all these components available from a single supplier simplifies procurement and shipping for OEMs, distributors, and service workshops. Browse our full flail mower gearbox catalog or request a parts list for your specific model.

Ulasan Pelanggan

Mike Harrison, Livestock Farming, United States
"We run a 1,400-acre cattle operation in central Missouri and needed a replacement gearbox for our 1.8-meter flail mower after the original Comer unit started leaking oil through the output seal. Ordered the TL-310A and it bolted right on, same hole pattern, same spline, zero modifications needed. Put about 280 hours on it through the summer cutting season and the gearbox runs quiet with no vibration. Changed the oil at 60 hours and there were no metal shavings in the drain. Good value for what you get compared to OEM pricing. Will be ordering another one for our second mower next spring."

Jean-Pierre Moreau, Municipal Maintenance, France
"Our commune maintains about 85 km of roadside verges with two tractor-mounted flail mowers. We lost a gearbox mid-season last year and the Comer lead time was over six weeks. Found the TL-310A from CMN Transmission online, placed the order on Thursday, and the gearbox arrived at our depot in Lyon within 18 days by sea freight plus truck. Quality of the casting and finish looked very good. We installed it the same afternoon and have been running it since October with no problems at all. The customer service team answered my email in less than four hours, which was appreciated."

Klaus Becker, Agricultural Equipment Distributor, Germany
"I distribute replacement parts for agricultural machinery across Bavaria and Baden-Wuerttemberg. Brought in a trial batch of 12 TL-310A units at the start of 2025 to test customer reception. All twelve sold within three months and I have had zero warranty returns so far. The 1:3 ratio, 540 RPM spec, and the cast iron GGG40 housing match the original Comer exactly. My customers appreciate that they can get a quality replacement gearbox at a lower price point without any compromise on fit. I have already doubled my next order quantity."

Carlos Mendes, Sugarcane Farm, Brazil
"We use flail mowers on our sugarcane farm in Sao Paulo state to manage the inter-row vegetation during the growing season. The conditions here are tough on equipment because of the heat, humidity, and abrasive red soil. The TL-310A has been running for over 400 hours and the seals are still holding tight with no oil leakage at all. I was worried about corrosion with the humidity we get here but the cast iron housing shows no signs of rust. Shipping to Santos port was well organized and the packaging was solid enough to survive the journey."

Tom McAllister, Pasture Maintenance, Australia
"Picked up the TL-310A for our contracting business here in New South Wales. We do pasture maintenance for about 30 local dairy and beef properties, so our mowers work hard through the season. Installation was dead simple since we already had the Comer version and the bolt pattern lined up perfectly. Only reason for four stars instead of five is I would have liked the gearbox to come with the oil already filled, but that is a minor thing. Performance wise it runs just as smoothly as the original and the price was significantly better. Would recommend it for anyone looking for a solid Comer replacement."

Roberto Galli, Vineyard Management, Italy
"We operate a 45-hectare vineyard in Tuscany and use an under-row flail mower to keep the vegetation between the vine rows managed. The previous gearbox failed after four seasons and I needed a replacement fast before the growing season. The TL-310A arrived in about two weeks to our location near Siena. The 18 kg weight is light enough that the mower stays balanced on the offset arm. After 200 hours of use between the vine rows, the gearbox is still running perfectly. The SAE 80W-90 oil holds up well in our summer heat. Very satisfied with this purchase."

David Campbell, Grounds Maintenance, United Kingdom
"I manage grounds for a local council in Yorkshire and we maintain parks, sports fields, and country lanes with our fleet of flail mowers. Replaced two worn Comer gearboxes with the TL-310A model at the start of the season. Both have performed well through around 350 combined hours of grass and verge mowing. No overheating issues even during the long summer days. Communication with the CMN team was clear and they sent the dimensional drawings before I ordered so I could double check the fit. Good professional service throughout."

Rajesh Patel, Farm Equipment Dealer, India
"We supply replacement gearboxes to sugarcane and rice farmers across Gujarat and Maharashtra. The demand for affordable Comer-compatible flail mower gearbox parts is strong here because many older imported machines need new gearboxes after years of heavy use. The TL-310A fits the machines our customers operate and the price point works well for the Indian market. We ordered a container of mixed models and CMN packed everything with individual serial tags and test reports. Our warehouse team confirmed no damage on arrival at Nhava Sheva port."

Alejandro Ruiz, Ranch Operations, Argentina
"Our ranch in the Pampas region covers over 3,000 hectares and we rely on flail mowers to clear weeds and grass along fence lines and around water troughs. The original gearbox on one of our machines was losing power and making grinding noises. Switched to the TL-310A and the difference was obvious right away. Smooth, quiet operation and the torque feels consistent even in thick patches of thistles. Have been running it since March through our autumn and winter maintenance schedule, about 250 hours so far, and it is holding up very well. The ordering process was straightforward."