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The Rotaro freewheel clutch is an indispensable safety device, specifically designed to protect the tractor's transmission and implement from the effects of inertia. This clutch, essential on machines with high rotating masses (such as heavy shredders or mowers), allows the implement to continue rotating freely and decelerate gradually once the tractor's Power Take-Off (PTO) is disengaged. Without a Rotaro freewheel clutch, the inertia would cause a destructive "kickback" on the transmission. Choosing an original Rotaro component guarantees the correct calibration and mechanical resistance needed to absorb these loads, preventing costly failures and increasing operational safety.
The Rotaro friction disc clutch is the most common and versatile torque limiter for protecting agricultural cardan shafts. It operates using a disc pack (typically made of ferrous and non-ferrous material) which, clamped by springs, transmits power through friction. When the implement encounters excessive resistance and the torque load exceeds the preset value, the discs slip, immediately interrupting the transmission of harmful forces to the tractor and the implement. This continuous slippage mechanism makes it ideal for machines working in variable conditions that require constant protection from momentary overloads. Choosing an original Rotaro friction disc clutch guarantees precise calibration and maximum durability of the disc pack.
The Rotaro pawl limiter (or pawl clutch) is a high-precision mechanical safety device, essential for protecting cardan shafts and implements subject to extreme and sudden torque spikes. Unlike disc clutches, this limiter ensures a total and immediate disengagement of the transmission when the preset load is exceeded, by disengaging the pawls (balls or rollers) from their seat. It is the ideal system for machines that work intermittently or with heavy impacts, such as heavy rotary tillers and seed drills. The Rotaro pawl limiter automatically re-engages once the overload has ceased and the implement slows down, ensuring the machine can immediately resume work.
The Rotaro shear bolt clutch is the simplest and safest torque limiter for protecting cardan shafts and agricultural machinery from catastrophic damage. This device uses a calibrated bolt as a safety element: when the transmitted load exceeds the maximum permitted limit, the bolt shears instantly. This completely disconnects the transmission, protecting the tractor and implement from mechanical failure. It is the ideal solution for equipment that must not suffer any slippage, such as certain types of ploughs or seed drills, and requires absolute protection. Although it requires bolt replacement after activation, the cost of the replacement part is minimal compared to the damage it prevents.
Driveline yoke for the R60 series, equipped with a shear bolt protection system. Designed to protect against overloads with a maximum torque of 2500 Nm. It features a 1 3/8” (6 spline) profile connection and uses an M10X50 shear bolt. The net weight of the yoke is 3.58 kg.
Driveline yoke for the R60 series, equipped with a cam clutch (ratchet) system. Designed to protect against overloads with a maximum torque of 1200 Nm. It features a 1 3/8” (6 spline) profile connection. The net weight of the yoke is 7.12 kg.
Locking bolt, spring, and lock nut kit for FF2 friction disc clutches (compatible with R50 and R60 series). The kit contains GM10X85 hexagonal screws complete with spring washer, with a total length L=33 mm and spring diameter d=17 mm. The package has a net weight of 1.07 kg.
Freewheel clutch for R50 series driveline shafts. Designed to withstand a maximum torque of 3800 Nm. It features a 1 3/8” (6 spline) profile connection with right-hand rotation. The net weight of the product is 4.98 kg.
Driveline yoke for the R70 series, equipped with a shear bolt protection system. Designed to protect against overloads with a maximum torque of 3000 Nm. It features a 1 3/8” (6 spline) profile connection and uses an M12X60 shear bolt. The net weight of the yoke is 3.86 kg.
Locking bolt, spring, and lock nut kit for FF4 friction disc clutches (compatible with R70 and R80 series). The kit contains GM10X100 hexagonal screws complete with spring washer, with a total length L=33 mm and spring diameter d=18 mm. The package has a net weight of 1.29 kg.
Freewheel clutch for R50 series driveline shafts. Designed to withstand a maximum torque of 3800 Nm. It features a 1 3/8” (6 spline) profile connection with left-hand rotation. The net weight of the product is 4.98 kg.
Driveline yoke for the R80 series, equipped with a shear bolt protection system. Designed to protect against overloads with a maximum torque of 3000 Nm. It features a 1 3/8” (6 spline) profile connection and uses an M12X60 shear bolt. The net weight of the yoke is 3.91 kg.
Replacement friction disc for FF2 and FF4 clutch assemblies (compatible with R50, R60, R70, and R80 series). The disc has an outer diameter of 160 mm and an inner diameter of 98.5 mm, with a thickness of 3.6 mm. The net weight of the component is only 95 g.
Freewheel clutch for R60 series driveline shafts. Designed to withstand a maximum torque of 3800 Nm. It features a 1 3/8” (6 spline) profile connection with right-hand rotation. The net weight of the product is 5.48 kg.
Driveline yoke for the R90 series, equipped with a shear bolt protection system. Designed to protect against overloads with a maximum torque of 3500 Nm. It features a 1 3/8” (6 spline) profile connection and uses an M12X65 shear bolt. The net weight of the yoke is 4.59 kg.
Freewheel clutch for R60 series driveline shafts. Designed to withstand a maximum torque of 3800 Nm. It features a 1 3/8” (6 spline) profile connection with left-hand rotation. The net weight of the product is 5.50 kg.
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