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Overrunning Clutch RA/RAS Series for PTO Drive Shafts

A PTO overrun clutch is a safety feature on a tractor that allows the PTO shaft to rotate freely in one direction while controlling the speed of an implement being hauled behind it. It prevents the speed of the implement from exceeding the tractor’s speed when slowing down. There are two ends of an overrunning clutch: the male end and the female end. The clutch has six splines, and the male end will turn the PTO shaft to the correct direction.
The PTO overrunning clutches of the RA series produced by Ever-power, a reliable PTO shaft factory, do not require lubrication and are not equipped with oil filler nozzles.

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RA/RAS Series PTO Overrunning Clutch Pto Overrunning Clutch

The PTO overrun clutch is a mechanical device that allows the PTO shaft to spin freely in one direction while still controlling the speed of the implement being hauled behind the tractor. This prevents the speed of the implement from exceeding the tractor's speed when it is slowed down. This device is available for a variety of different tractors.

This overrun PTO clutch prevents the transmission of inertial energy to the PTO. When a PTO is disengaged, inertia prevents the shaft from stopping. The PTO shaft on older tractors is often directly coupled to the output side of the transmission. This means that when you coast, the drive wheels are still spinning. While not always enough to stop the spinning equipment, the brakes can't stop the spinning equipment.

Without a PTO overrun clutch, the tractor could double its speed and run into an object. This would be unsafe and potentially damaging. Fortunately, there are various solutions. Some of the best solutions include purchasing a heavy-duty unit for your tractor. These units also have an integrated, heavy-duty adjustable disc-type safety clutch.

RA1 Series PTO Overrunning Clutch Specification

A PTO overrunning clutch is a mechanical component that allows the PTO shaft to freely spin in one direction while preventing the equipment from driving through the PTO shaft. It works much like a bicycle freewheel hub and is designed to prevent dangerous situations such as a rotary mower from driving through the PTO drive shaft.
In addition to preventing your lawn mower from stalling, it will prevent it from spinning while engaged.

RA1 Series PTO Overrunning Clutch Specification RA1 Series PTO Overrunning Clutch

  1. Circlip
  2. Retaining washer
  3. Push pin kit
  4. Hub
  5. Prong kit (Qty.=3)
  6. Housing with yoke
  7. Grease nipple

RA2 Series PTO Overrunning Clutch Specification

RA2 Series PTO Overrunning ClutchRA2 Series PTO Drive Shaft Overrunning Clutch

  1. Circlip
  2. Retaining washer
  3. Push pin kit
  4. Hub
  5. Prong kit (Qty.=3)
  6. Housing with yoke
  7. Grease nipple

RAS Series PTO Overrunning Clutch Specification

RAS Series PTO Overrunning Clutch RAS Series PTO Overrunning Clutch

Overrunning Clutch for PTO Shaft

  1. Circlip
  2. Retaining washer
  3. Push pin kit
  4. Hub
  5. Prong kit (Qty.=3)
  6. Housing with the splined yoke
  7. Grease nipple

Performance Advantage of PTO Overrunning Clutch

◆ Allows inertia from implementation to dissipate without putting load back through the tractor or system.
◆ Easy maintenance.
◆ Smooth operation.
◆ Offered in various driveshaft sizes and hub configurations.
◆ Easier connection by enabling the shaft to be aligned with the tractor PTO spline.

Design Features of PTO Overrunning Clutch

◆ PTO overrunning clutch is offered in two different configurations – for both clockwise (R) and counter-clockwise (L) overrunning directions.
◆ The counterclockwise version is recognized by the groove.

PTO Overrunning Clutch

More about PTO Overrun Clutch

Slip clutches are another alternative to a PTO overrun clutch. These PTO overrun cltches are a bit different from a slip clutch and are not usually added to tractors cheaply. While a PTO overrun clutch is necessary for standard tractors, there are also those that are designed specifically for non-standard PTO shafts. In such cases, a special ORC is used as a converter. In such a case, the PTO shaft is directly coupled to the output side of the transmission. While coasting, the drive wheels continue to spin through the PTO shaft. The result is that the tractor is unable to stop in time, causing severe damage to the vehicle.

A PTO overrun clutch will prevent power from back-feeding into the transmission, which in turn transmits power to the rear wheels. Without a PTO overrun clutch, the spinning blade assembly can cause the tractor to back-feed power back into the transmission and into the rear wheels. This can lead to a serious accident if it hits an object.

Additional information

Edited

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1. Stainless Steel: SS201, SS303, SS304, SS316, SS416, SS420
2. Steel:C45(K1045), C46(K1046),C20
3. Brass:C36000 ( C26800), C37700 ( HPb59), C38500( HPb58), C27200(CuZn37), C28000(CuZn40)
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5. Iron: 1213, 12L14,1215
6. Aluminum: Al6061, Al6063
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Wooden Case/Container and pallet, or as per customized specifications.
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