适用于 Omni RC-120 旋转切割机的变速箱替换件

The RC-120 Rotary Cutter Gearbox Replacement for Omni RC-120 Gearbox is a premium-grade power transmission unit engineered specifically for agricultural machinery across demanding field environments. Designed to serve as a direct drop-in replacement for the OEM Omni RC-120 gearbox, this unit is primarily used to drive rotary knives and cutting assemblies for efficient vegetation management operations, including grass cutting, straw crushing, and brush clearing. Rated from 51 to 161 HP and delivering torque between 803 and 2,252 Nm, it converts the high-speed rotation of a tractor PTO shaft (540 or 1,000 RPM) into stable, high-torque output suitable for even the heaviest cutting loads. Five selectable gear ratios (1.21:1, 1:1, 1:1.21, 1:1.46, 1:1.92) allow the operator to match output speed and torque to the specific crop density or terrain encountered. The bevel gear architecture, triple-lip spring-loaded seals, and tapered roller bearings ensure this agricultural gearbox withstands the relentless shock loads, contamination, and moisture exposure inherent to rotary cutter operation.

This gearbox for rotary cutter applications excels across a wide range of scenarios: slashing overgrown roadsides, cutting thick pasture grass between grazing cycles, mulching post-harvest crop stubble, and clearing brush along fence lines and waterways. The sealed ductile iron housing, weighing 49.9 kg (109 lbs), contains a precision bevel gear set that redirects PTO input through 90 degrees to drive the blade spindle vertically beneath the mower deck. Whether used on finishing mowers, rotary slashers, or heavy-duty rotary cutters, the RC-120 maintains consistent blade speed even as load conditions fluctuate, protecting both the cutting implement and the tractor driveline. For operators seeking a reliable, proven replacement rotary cutter gearbox that installs without modification and performs at OEM specification, the RC-120 from CMN Transmission is the definitive choice.

产品规格

RC-120 Rotary Cutter Gearbox Dimensions

Key Features of the RC-120 Rotary Cutter Gearbox

1. Terrain Adaptability and Floating Design
The floating gearbox mounting design allows the cutter deck and blade assembly to ride with ground undulations automatically, preventing the cutting blades from striking buried rocks, hardwood stumps, or irrigation fittings at full operating speed. This adaptive height adjustment is particularly critical when mowing on uneven pasture terrain, sloped embankments, or waterway banks where the ground surface can change rapidly across the working width. The result is reduced shock transmission to the gearbox housing and significantly extended gear and bearing service life.

2. Accessible Field Maintenance Design
Rotary cutter gearbox oil maintenance is simplified by externally accessible oil fill ports and a bottom-mounted drain valve that allow complete oil changes without removing the gearbox from the implement. Operators can check the rotary cutter gearbox oil level and add gear oil directly from ground level. The pressure relief plug prevents internal pressure buildup during operation, protecting seals from premature blow-out. This field-serviceable design reduces scheduled maintenance downtime and supports proper rotary cutter gearbox oil change intervals even during peak seasonal workloads.

3. Tractor PTO Drive Compatibility
RC-120变速箱可直接连接至拖拉机的动力输出轴（PTO），并完全支持标准的540转/分和1000转/分两种输入转速。花键式输入轴可安装快速更换联轴器，无需专用工具即可在田间快速安装和拆卸。这种广泛的PTO兼容性使得该变速箱无需适配轴或定制改装即可与小型多用途拖拉机、中型行间作物拖拉机以及大型四驱农机具配套使用。

4. Industrial-Grade Durability and Sealing
The housing is cast from high-strength ductile iron with a Red Oxide primer coating that resists corrosion from mud, water, gravel, and the acidic plant sap encountered in daily agricultural use. Triple-lip spring-loaded oil seals encircle each rotating shaft, creating a three-stage barrier against both gear oil leakage and field contamination ingress. This heavy-duty sealed construction is purpose-built to withstand the abrasive and moisture-laden environment of rotary cutting operations and to protect the tapered roller bearing assemblies from premature failure caused by contaminated lubrication.

5. Multiple Speed Ratios for Any Crop or Terrain
With five selectable rotary cutter gearbox ratios spanning from 1.21:1 to 1:1.92, this unit covers the complete range of rotary mower gearbox output requirements. Operators managing light grass on flat pasture can select a higher blade speed ratio for a cleaner cut, while those working through dense wetland vegetation or steep slope terrain can shift to a lower-speed, higher-torque ratio to maintain stable cutting power without overloading the tractor. This flexibility makes the RC-120 an outstanding finishing mower gearbox as well as a heavy-duty rotary slasher gearbox depending on the ratio selected.

6. 过载安全保护
RC-120 的设计允许在输入轴上加装可选的自由轮离合器或剪切螺栓过载保护系统。当切割刀片全速撞击不可移动的障碍物时，过载保护装置会在灾难性扭矩通过锥齿轮组传递之前脱离或剪切，从而保护变速箱内部零件和拖拉机的动力输出轴传动系统免受损坏。这种集成式安全机制在有掩埋碎屑、隐蔽树桩或岩石露头的区域作业时尤为重要，因为在这些区域，刀片突然卡死的情况难以预料。

工作原理

RC-120 旋转切割机变速箱是任何旋转切割机、精修割草机或旋转式割草机等农具的核心动力传输元件。其工作原理始于拖拉机的动力输出轴 (PTO)，根据拖拉机的 PTO 标准和速度选择，PTO 以 540 或 1000 转/分的转速输出旋转能量。该水平旋转输入通过硬化合金钢输入轴进入变速箱，输入轴两端由精密锥形滚子轴承支撑，这些轴承能够承受齿轮啮合力产生的径向载荷以及方向改变和载荷波动过程中产生的轴向推力载荷。

在球墨铸铁壳体内，输入轴驱动主锥齿轮。锥齿轮组是农用变速箱的核心部件，它将水平动力输出轴（PTO）的输入精确地旋转90度，同时调节输入和输出之间的速度和扭矩关系。在高速比（例如1:1.92）下，输出轴的转速远高于输入轴，从而产生高刀尖速度，这对于精修割草机变速箱应用而言至关重要，能够实现干净利落的割草作业。在低速比（例如1.21:1）下，锥齿轮增大了输出扭矩相对于输入扭矩的比例，使旋转式割草机变速箱拥有足够的机械优势，能够轻松应对茂密的灌木丛、木质茎秆和潮湿的植被，而不会发生故障。

The output shaft exits the base of the housing and transmits drive power directly to the blade carrier spindle below the mower deck. As cutting blades encounter varying material densities throughout a pass, such as cutting thick straw, weeds, or woody brush, the bevel gear set continuously maintains the operator-selected speed ratio while the tapered roller bearings absorb the resulting axial and radial load spikes without deflection. The triple-lip spring-loaded oil seals at both shaft exit points retain the 1.8 liters of gear oil that bathes the gear mesh surfaces and lower bearing races in a continuous lubrication film.

The built-in pressure relief plug regulates internal air pressure within the housing as operating temperature rises, preventing seal failure from internal pressure buildup during extended high-load operation. This self-regulating lubrication and pressure management system is why a properly maintained 旋转切割机齿轮箱 can sustain continuous operation across a full working day without overheating or oil-related component failure. The carburized alloy steel shafts, precision-forged bevel gears, and heavy ductile iron housing work together as an integrated system to ensure that virtually the entire HP rating of 51 to 161 HP reaches the cutting blades efficiently rather than being lost as heat or vibration within the gearbox itself.

RC-120 的多速配置还支持地形适应性，允许操作员选择适合特定田间条件的旋转切割机变速箱比率：陡坡和湿地受益于更高的扭矩比率，而平坦的已完成田地则更适合使用更快的刀片速度比率，从而产生更精细的切割效果。

Applications of the RC-120 Gearbox

RC-120 Rotary Cutter Gearbox Components

1. 变速箱壳体
Manufactured from high-strength ductile iron to enclose and protect all internal components. The housing absorbs shock loads generated when blades strike field debris, maintains gear oil containment under all operating angles, and provides the structural backbone to which shafts, bearings, and seals are precisely mounted. A Red Oxide primer coating protects the exterior from corrosion in wet and abrasive field conditions encountered daily in agricultural rotary cutting applications.

2. 锥齿轮
The primary power-transmission elements inside the RC-120 rotary cutter gearbox. Precision forged and machine-cut from hardened alloy steel, the bevel gears redirect PTO shaft rotation through 90 degrees to drive the blade spindle, while simultaneously adjusting the output speed and torque according to the selected gear ratio. Precision straight bevel, spiral bevel, and lapped spiral bevel configurations are all available to match the specific performance and noise requirements of the application.

3. 输入轴
该轴直接连接至拖拉机的动力输出轴（PTO）。它采用渗碳合金钢制造，具有极高的抗扭强度，从农具的动力输出轴接收旋转动力并将其传递至齿轮啮合机构。RC-120 提供标准花键配置，包括 1-3/8 英寸六花键和 1-3/4 英寸六花键，无需改装或额外硬件即可与多种拖拉机型号兼容。

4. 输出轴
Positioned at the base of the housing, the output shaft delivers drive power downward to the blade spindle or cutting assembly. Manufactured from carburized alloy steel and dimensioned to handle the high torque loads and repeated impact stress generated during rotary cutting operations. Shaft extensions are available as splined, keyed, or with pin holes, and multiple shaft extension unit configurations are offered to suit different implement blade attachment designs.

5. 轴承
ISO tapered roller bearings support both the input and output shafts, maintaining precise gear alignment under radial and axial load conditions simultaneously. Bearing quality has a direct effect on gearbox noise level, heat generation, and overall service life. The tapered roller design used in the RC-120 is specifically chosen to handle the combined axial and radial loading environment that bevel gear drives generate during normal rotary cutter operation.

6. 油封
High-quality triple-lip spring-loaded seals are fitted around all rotating shafts, creating a three-barrier system that simultaneously prevents gear oil from escaping the housing and blocks mud, water, and abrasive particles from entering and contaminating the lubrication system. Worn seals are among the most common causes of premature rotary cutter gearbox failure, making this triple-lip design a significant upgrade over single-lip alternatives. Viton seal and cartridge seal options are also available.

7. Pressure Relief Plug and Cast Iron End Caps
A pressure relief plug is fitted as standard to prevent internal air pressure from rising and forcing gear oil past the shaft seals as the gearbox warms up during operation. An optional oil level indicator is also available. Precision cast iron end caps close and seal both sides of the housing, creating a fully enclosed, contamination-resistant assembly that protects bearing races and gear tooth surfaces throughout the full operating life of the unit.

How to Properly Maintain Your Rotary Mower Gearbox

Check and Maintain Correct Oil Level
Before each use, verify the rotary cutter gearbox oil level using the sight glass or dipstick. The oil should be at the full mark when the gearbox is in its normal operating position. Running the unit below the correct rotary cutter gearbox oil level causes inadequate bearing and gear lubrication, leading to overheating and accelerated wear. Use gear oil of the grade specified in the service manual and top up with the same oil type already in the unit to prevent compatibility issues.

Follow a Regular Oil Change Schedule
For new gearboxes, perform the first oil change after approximately 25 hours of operation to flush any metallic particles generated during the break-in period. After that, change the rotary cutter gearbox oil every 100 to 200 hours of use, or at minimum once per season before storing the unit. Contaminated or degraded oil loses its viscosity protection and allows moisture to accelerate internal corrosion, so oil change intervals should never be extended beyond the recommended schedule regardless of how clean the drained oil appears.

Inspect Seals and Gaskets Regularly
Examine the shaft seals and housing gaskets visually each time the gearbox is serviced, looking for oil weeping, caked-on debris indicating a slow leak, or physical cracking of the seal lips. Seal failure allows gear oil to escape and field contamination to enter, dramatically shortening bearing and gear life. Replace any seal showing signs of wear or hardening immediately. Rotary cutter gearbox repair of seal failure is far less expensive when caught early than a full internal rebuild caused by contamination damage.

Clean the Housing After Every Use
Rinse or brush accumulated grass, mud, and plant sap from the gearbox housing exterior and shaft seal areas after every mowing session. Vegetation and soil packed around seal areas accelerates lip wear and creates moisture traps that promote rust formation on the housing surface. Keeping the housing clean also makes it easier to spot oil leaks, cracks in the casting, or loose fasteners before they develop into costly failures requiring rotary cutter gearbox rebuild procedures.

Check Mounting Bolts and Hardware Torque
The high shock load environment of rotary cutting causes mounting hardware to loosen progressively over time. Inspect and re-torque all flange mounting bolts, blade carrier fasteners, and PTO driveshaft connection hardware at the beginning of each season and after any blade strike event severe enough to trigger the overload protection system. Loose mounting bolts allow the gearbox to move under load, introducing misalignment stresses on the input and output shafts that accelerate bearing wear.

Store the Gearbox Correctly During Off-Season
Before long-term storage, drain and replace the gear oil to remove moisture and metallic particles accumulated during the season. Coat exposed shaft ends with a light film of anti-corrosion grease and store the implement in a dry, covered location. If the gearbox is stored with the output shaft pointing vertically downward, verify that oil is at the correct fill level so the lower bearing race remains submerged. A fresh oil fill going into storage is the single most effective step to prevent internal corrosion during the off-season.

常见故障及解决方法

PTO Drive Shaft and Rotary Cutter Gearbox

旋转式割草机变速箱和动力输出轴共同构成了拖拉机发动机与机具底盘下方切割刀片之间完整的机械动力传输路径。无论是为小型拖拉机购买 40 马力旋转式割草机变速箱，还是为大型商业割草作业购买 100 马力旋转式割草机变速箱，了解这种相互关系对于选择、安装或维修这些部件的人员都至关重要。

动力输出轴（PTO轴）是一根伸缩式传动轴，两端带有万向节，连接拖拉机后部的PTO输出法兰和变速箱输入轴。拖拉机PTO标准规定，该轴的转速为540转/分（通常用于额定功率低于50马力的拖拉机）或1000转/分（更常见于高功率拖拉机），旋转方向由拖拉机制造商指定。PTO轴由塑料安全护罩保护，防止在运转过程中与旋转部件接触。护罩和轴本身都必须妥善维护，并与农具所需的扭矩容量相匹配。

旋转式割草机的变速箱直接从拖拉机的动力输出轴 (PTO) 连接到垂直轴线上的刀片托架。变速箱和动力输出轴将动力从拖拉机的动力输出轴传递到割草机底盘下方，驱动割草机的重型刀片旋转。当重型摆动刀片以工作速度撞击茂密的灌木丛、岩石或小树时，变速箱能够承受高冲击载荷。这些冲击事件会产生突如其来的扭矩峰值，其大小可能远超平均工作扭矩。变速箱壳体、齿轮齿形和轴承的选择都经过专门设计，能够吸收并分散这些峰值扭矩，从而避免故障发生。

动力输出轴（PTO轴）的长度对于安全高效的动力传输至关重要。如果轴太短，伸缩节在农具三点式悬挂装置升降过程中可能会完全折叠，导致动力输出轴脱离或断裂。如果轴太长，伸缩节可能会触底，阻碍悬挂装置完全升起。正确的轴长是通过测量特定拖拉机-农具组合的压缩和伸展尺寸，并确认两种状态下轴的重叠长度是否足够来确定的。大多数农具制造商规定，轴的最小重叠长度至少应为压缩长度的三分之一。

For optimum gearbox performance, the PTO driveshaft operating angle should be kept as small as possible during field operation. Excessive universal joint operating angles create velocity fluctuations in the driveshaft rotation that are transmitted as vibration and torque pulsation into the gearbox input shaft. These pulsations accelerate bearing wear, promote gear tooth surface fatigue, and increase noise levels. Setting up the implement so the driveshaft runs as straight as practicable between the PTO output and the gearbox input is one of the most effective and lowest-cost ways to extend gearbox service life considerably.

动力输出轴 (PTO) 与变速箱输入轴之间的过载保护由安装在变速箱输入轴上的剪切螺栓轮毂或集成在 PTO 驱动轴组件中的滑动离合器提供。剪切螺栓轮毂采用低强度钢螺栓，在达到设定的扭矩时断裂，从而立即停止动力传输。滑动离合器轮毂允许驱动装置在达到预设扭矩极限时打滑，提供持续保护，无需每次过载后更换螺栓。CMN Transmission 建议始终安装合适的过载保护装置，切勿通过更换强度更高的螺栓来绕过剪切螺栓，因为这样做会将故障点从易损件转移到变速箱内部组件或拖拉机的 PTO 轴。

将动力输出轴的额定扭矩与变速箱的最大额定扭矩相匹配是最终的关键规格检查。在选择旋转割草机变速箱部件（包括替换动力输出轴）时，务必确认轴的额定扭矩容量达到或超过RC-120在所选齿轮比下的最大扭矩输出。在额定功率为60马力或75马力的旋转割草机变速箱上使用尺寸过小的动力输出轴是导致轴断裂的常见原因，这会在田间作业过程中危及设备和操作人员的安全。

为什么选择 CMN Transmission 的旋转切割机齿轮箱？

Korea CMN Transmission Co., Ltd. was established in 2000 and is headquartered in Sandan-o, Danwon-gu, Ansan-si, Gyeonggi-do, South Korea. With more than 100 factory employees dedicated to the research, development, manufacturing, sales, and after-sales service of agricultural power transmission equipment, CMN Transmission has spent over two decades building a reputation as one of the most trusted rotary cutter gearbox manufacturers in the global agricultural machinery industry. With an annual production volume exceeding 500,000 units, CMN consistently delivers reliable performance and long-term durability for OEM and aftermarket customers across every major agricultural market worldwide.

CMN的产品系列涵盖了农业齿轮箱应用的各个领域：旋转切割机齿轮箱、旋耕机齿轮箱、饲料搅拌机齿轮箱、旋转割草机齿轮箱、肥料撒布机齿轮箱、甩刀式割草机齿轮箱、挖坑机齿轮箱、圆捆打捆机齿轮箱、方捆打捆机齿轮箱、圆盘式割草机齿轮箱、中心支轴式喷灌机齿轮箱、液压驱动齿轮箱、青贮机齿轮箱、果园喷雾器齿轮箱、旋转耙齿轮箱、联合收割机齿轮箱、粮食储存和运输齿轮箱、玉米收割台齿轮箱、切割杆齿轮箱、家禽饲料齿轮箱以及涵盖近千种规格的定制农业齿轮箱。这些产品服务于全球范围内的粮食收割机、饲料机械、割草机、打捆机、耙草机、旋耕机、肥料撒布机、喷雾器、饲料搅拌机、青贮机和联合收割机等设备。

CMN Transmission holds CE, ISO 9001 Quality Management, Environmental Management, and Occupational Health and Safety certifications, giving procurement managers and equipment dealers the compliance documentation required for regulated markets without additional testing burden. Products are exported to the United States, Canada, Mexico, Brazil, Argentina, France, Germany, Italy, Spain, the United Kingdom, Russia, China, India, Thailand, Vietnam, Turkey, Australia, New Zealand, and more than 40 additional destinations worldwide, supported by a logistics network with extensive experience navigating agricultural equipment customs classifications and phytosanitary requirements in every major export market.

常见问题解答

Q: What oil type and how much oil does the RC-120 rotary cutter gearbox require?
答：RC-120 的齿轮油容量为 60 盎司（1.8 升）。大多数旋转切割机变速箱使用 SAE 90 或 SAE 140 齿轮油，但也有一些制造商推荐使用 80W-90 等多级齿轮油。务必查看变速箱制造商的规格说明，并避免混用不同类型的油。保持正确的旋转切割机变速箱油位对于防止过热和过早磨损至关重要。每次使用前检查油位，新机运行 25 小时后更换机油，之后每运行 100 至 200 小时更换一次。

Q: Is the RC-120 a direct replacement for the Omni RC-120 gearbox?
A: Yes. The CMN Transmission RC-120 Rotary Cutter Gearbox is designed as a direct bolt-on replacement for the original Omni RC-120 gearbox. It matches the OEM mounting bolt pattern, flange dimensions, input shaft spline specification, and output shaft dimensions. No modification, drilling, or custom adapters are required for installation. This replacement rotary cutter gearbox meets or exceeds OEM torque and HP ratings, so your implement performs at the same level as it did with the original gearbox.

Q: What does the rotary cutter gearbox ratio mean and which ratio should I choose?
答：旋转切割机变速箱的传动比描述了输入轴转速（来自拖拉机动力输出轴）和输出轴转速（驱动刀片）之间的关系。1:1 的传动比表示输出轴和输入轴的转速相同。1:1.92 的传动比表示输出轴的转速是输入轴的 1.92 倍，可提供更高的刀尖速度，适用于轻质草坪和精修割草机。1.21:1 的传动比可降低转速并增加扭矩，更适合茂密的灌木丛、潮湿的植被或陡峭的地形。选择最适合您拖拉机动力输出轴转速和目标切割应用的传动比。

问：如何判断我的旋转切割机变速箱是需要大修还是更换？
A: Signs that a rotary cutter gearbox rebuild or replacement is needed include persistent grinding or growling noise that continues after correcting the oil level, visible gear oil leaks from shaft seal areas despite new seals, excessive output shaft end play beyond manufacturer tolerance, a bent or cracked housing, or complete loss of drive after replacing the shear bolt. If the internal gears show pitting, spalling, or chipped teeth on inspection, a full rotary cutter gearbox rebuild is required. In many cases, when the housing is cracked or heavily worn, purchasing a replacement RC-120 gearbox from CMN Transmission is more economical than a full internal rebuild.

Q: Can I use this gearbox on a 40 HP, 60 HP, 75 HP, or 100 HP tractor?
A: The RC-120 is rated for 51 to 161 HP, so it is appropriate for 60 HP, 75 HP, and 100 HP rotary cutter gearbox applications within that range. It is above the rated range for a 40 HP rotary cutter gearbox application, where a smaller RC-series model would be more suitable. Operating a gearbox below its rated HP does not cause damage, but selecting the correct HP rating ensures the gear tooth size, bearing capacity, and housing strength are properly matched to the load being transmitted. Contact CMN Transmission to confirm the correct model for your specific tractor HP and implement type before ordering.

Q: What causes rotary cutter gearbox oil leaks and how do I fix them?
A: Rotary cutter gearbox oil leaks most commonly originate from worn or hardened shaft oil seals, a blocked pressure relief plug causing internal overpressure, an over-filled oil level, or hairline cracks in the housing. To fix a shaft seal leak: drain the oil, remove the seal, clean the shaft and bore, press in a new triple-lip seal, refill to the correct oil level, and check that the pressure relief plug moves freely. For a cracked housing, consult a casting repair specialist or replace the gearbox. Always correct a seal leak before the next use to prevent contamination from entering and causing accelerated internal wear.

Q: What rotary cutter gearbox parts are available for the RC-120?
A: CMN Transmission offers a range of rotary cutter gearbox parts for the RC-120, including replacement seal kits (triple-lip shaft seals), tapered roller bearing sets, bevel gear pairs, input and output shaft assemblies, pressure relief plugs, and end cap gaskets. Blade hub kits and seal protector hubs are also available as optional accessories. When ordering replacement parts, always specify the model number and ratio of your gearbox to ensure compatibility. Keeping a basic seal kit and bearing set on hand reduces downtime when scheduled maintenance reveals worn components during the operating season.

Q: How long does delivery take and does CMN ship internationally?
A: CMN Transmission ships the RC-120 Rotary Cutter Gearbox to over 60 countries worldwide from its manufacturing facility in Ansan, South Korea. Delivery times vary by destination: express air freight typically delivers within 7 to 14 business days to major markets including the United States, Canada, the United Kingdom, Germany, France, Australia, and Brazil. Sea freight options are available for bulk orders at lower per-unit cost with longer lead times. CMN handles all export documentation, and units are supplied with CE certification. Contact the sales team for a freight quotation to your specific location and to confirm current stock availability.

Q: What is the difference between a rotary mower gearbox and a rotary cutter gearbox?
A: The terms rotary mower gearbox and rotary cutter gearbox are often used interchangeably in the agricultural industry, as both describe a bevel gear power transmission unit that drives rotating cutting blades on a PTO-powered tractor implement. The distinction, when it exists, is typically one of application weight: a rotary mower gearbox often refers to a unit used on lighter finishing mowers for turf and pasture maintenance, while a rotary cutter gearbox or rotary slasher gearbox implies a heavier-duty unit designed for brush clearing, roadside slashing, and rougher cutting conditions. The RC-120 covers both categories with its 51 to 161 HP rating and five available gear ratios.

Q: How do I find the correct rotary cutter gearbox for sale that fits my implement?
A: To identify the correct rotary cutter gearbox for your implement, you need: (1) the mounting flange bolt hole pattern diameter and number of bolts, (2) the hub pilot diameter, (3) the input shaft spline count and diameter (typically 1-3/8 inch or 1-3/4 inch 6-spline for agricultural PTO applications), (4) the output shaft dimensions and attachment interface, and (5) the HP or torque rating required by your implement. If your implement is an Omni RC-120 or equivalent, the CMN RC-120 is the confirmed direct replacement. For other models, share your implement make, model, and the dimensions listed above with the CMN technical team, who can confirm compatibility before you complete your order.

Q: Can I use synthetic gear oil in my rotary cutter gearbox?
A: Yes, synthetic gear oil can be used in the RC-120 if it meets the API GL-4 or GL-5 specification and the viscosity grade recommended for your operating temperature range. Synthetic oils generally provide better thermal stability at high operating temperatures, improved low-temperature flow for cold-start conditions, and longer drain intervals than conventional mineral gear oils. However, never mix synthetic and mineral gear oils in the same gearbox. If switching from mineral to synthetic, drain the old oil completely and flush with a small quantity of the new synthetic before filling to the full mark. Check the rotary cutter gearbox oil level after the first few hours of operation on the new fill to confirm correct level.

用户评价

Travis Holloway, Pasture Management, United States
“我用一台90马力的约翰迪尔拖拉机在约200英亩的混合牧场和溪岸地带作业，我的犀牛牌割草机原装变速箱在连续三个季度高强度使用后坏掉了。我在CMN网站上找到了这款RC-120替换件，说实话，我对这个价位的副厂件并没有抱太大期望。结果，我只花了一个小时就安装好了，用的还是原来的螺栓孔位，不用钻孔，不用转接器，什么都不用。现在已经连续六个月高强度使用，在茂密的百慕大草和灌木丛生的溪边作业，一点问题都没有。机油干净，没有漏油，也没有异响。真的非常满意。以后需要的时候还会再买。”

Derek Fontaine, Vegetation Management, Canada
“我们在安大略省经营路边割草业务，变速箱的磨损速度比大多数公司都快。大约一年前，在另一位承包商的推荐下，我们试用了CMN的RC-120变速箱。现在，我们两台机器都已经使用CMN的替换变速箱约350小时了。密封件依然完好，没有漏油，而且两台机器都以1:1.46的传动比运行，这与我们100马力的久保田割草机完美匹配，非常适合修剪公路路肩上的混合草和灌木。从韩国寄来的包装也非常好；运输过程中没有损坏，而其他供应商经常出现这种情况。当我咨询传动比选择问题时，客服也很快回复。真是可靠的产品和供应商。”

Rodrigo Alves Ferreira, Sugar Cane Operations, Brazil
“我买这个是为了在圣保罗州的甘蔗种植园里使用。我们用它搭配一台75马力的拖拉机，在收割后用来粉碎甘蔗残渣，它能很好地胜任这项工作。1:1.21的传动比提供了我们所需的扭矩，而且不会让拖拉机动力不足。运到巴西大约花了3周时间，这对于进口商品来说很正常，而且清关也很顺利。我没有给五星好评的唯一原因是，我需要在当地购买齿轮油，因为它不包含在内，虽然这很正常，但还是值得一提。除此之外，这次购物体验非常棒，我会毫不犹豫地再次购买。CMN的团队非常清晰快捷地解答了我关于轴尺寸的售前问题。”

Klaus-Dieter Brandt, Farm Machinery, Germany
“我们用RC-120变速箱搭配120马力的拖拉机，安装在割草机上，主要用于田边和树篱下方的植被覆盖。就质量而言，这款变速箱给人的印象非常扎实；球墨铸铁外壳做工精良，密封件也完美契合。第一个季度过后，没有出现任何漏油、异响或其他问题。起初我对韩国制造商有些顾虑，但CMN的表现远超预期。他们的英语沟通非常顺畅，而且通过DHL快递，12个工作日就送到了德国。强烈推荐给所有正在寻找可靠变速箱替代品的人。”

Brendan Carrick, Pasture Maintenance, Australia
“我在新南威尔士州管理着大约400公顷的牧羊场，牧场维护工作永不停歇。我那台麦康奈尔割草机的原装变速箱在季中就坏了，而那正是我最需要它的时候。CMN公司立即提供了RC-120变速箱，他们的支持团队在我下单前确认了规格与我的机器完全匹配。变速箱10个工作日就送到了，比我预期的要快得多，毕竟是从新南威尔士州偏远地区发货。安装只用了不到一个小时。那是8个月前的事了，从那以后，我已经用它割了大约180个小时，从干燥的菊苣草到潮湿的黑麦草，各种牧草都割过。齿轮啮合顺畅，输出轴没有间隙，密封件在尘土飞扬的牧场环境中也完好无损。”

Hernan Gomez Vargas, Sugar Cane Farm, Colombia
“我购买RC-120是为了替换我们在托利马甘蔗农场使用的旋转式割草机上的原装变速箱。我们已经满负荷运转了4个月，至今没有任何问题。我们按照CMN通过电子邮件发送的说明自行安装的。我非常满意销售团队能够快速回复我的邮件咨询，并在我下单前确认该型号与我的机器兼容。运送到哥伦比亚花了3周时间，这还可以接受。就其质量而言，价格非常有竞争力。我已经向该地区的其他农民推荐了这款产品。”

Simon Partridge, Roads Maintenance, United Kingdom
“我在林肯郡一家地方政府道路管理部门工作，我们每年维护约600公里的乡村路肩。过去两年，我们一直坚持为所有拖拉机式割草机配备CMN公司的RC-120变速箱。迄今为止，我们购买的11台设备中，没有一台需要保修。在决定大规模采购之前，我们特别测试了不同批次产品之间的质量一致性，CMN的产品符合我们的要求。他们的出口文件和CE认证文件也一应俱全，而且第一次就提供了，这对我们的采购流程至关重要。对于任何正在寻找可靠的旋转式割草机变速箱供应商的地方政府或承包商，我会毫不犹豫地推荐CMN。”

Manuel Diaz Moreno, Sunflower and Cereal Stubble, Spain
“我在安达卢西亚从事旋耕机作业多年，一直都在寻找价格合理的优质配件。CMN Transmission 的 RC-120 变速箱正符合我的需求。我们将其安装在一台 90 马力的旋耕机上，用于收割后清理向日葵和谷物的残茬。1:1.92 的传动比非常适合这项工作。变速箱本体做工精良，密封件出厂时就已调校到位，而且在使用的前 120 小时内没有出现任何漏油现象。CMN 的技术服务团队通过电子邮件在不到 2 小时内就解答了我们关于正确油位的问题。我对这次购买以及销售团队的服务都非常满意。”

Suresh Patel, Cutting Paddy and Wheat Stalk, India
“我们农场使用这款RC-120变速箱，搭配一台60马力的拖拉机和一台旋转式割草机，用于收割稻秆和牧草。这款变速箱安装起来非常方便，CMN团队在整个过程中都耐心解答了我们的疑问。前三个月使用没有任何问题。我们之前的变速箱用了两个季度就坏了；从这款新变速箱的质量来看，它应该能用更久。我会推荐CMN的产品。包装也非常好，没有损坏，送货时间也合理。”