Oiler roller clutch

[Philip Somers 1Participant @philipsomers1]

Has anyone any drawings for a 1/8” roller clutch or can anyone give me a link to a supplier.

cheers!

Phil

[Philip Somers 1Participant @philipsomers1]

[Oily RagParticipant @oilyrag]

I recently made a 3/16" 'sprag' clutch using 5 off 3/16" rollers 1/2" long. Fairly easy to make with a rotary table offset from centreline to generate the roller ramps. This was to replicate a starter system on a Jaguar XJR15, I was unsuccesful in discovering the original suppliers but suspect it was an American helicopter part (it utilised a 'helicopter shaft' coupling to connect the remote mounted starter motor to the Bendix starter gear)

Pictures to follow

[Speedy Builder5Participant @speedybuilder5]

Is this what you mean ? other sources available.

3mm roller clutch

[bernard towersParticipant @bernardtowers37738]

Arc euro or your local bearing supplier

[Ketan SwaliParticipant @ketanswali79440]

Hello Philip,

I think you maybe looking for a Drawn Cup Needle Roller Clutch Bearing (DCNRCB): RC02, which has a 1/8" bore (after compression).

If you do a google search, you will find it. Try to get from known U.K. or American suppliers.

ARC stopped selling it as it is getting rare and expensive in U.K./Europe.

If you can design your lubricator box incorporating a 3mm shaft, then consider the link suggested by Speedy**, or similar for an HF0306, which will give you a 3mm bore (after compression)

These bearings function in a similar way to Sprag Clutch, but they are different in the way they are made, and have a smaller overall dimensional profile than a sprag. RS Components incorrectly refer to HF0306 as a sprag clutch.

"After Compression bore of 1/8" or 3mm : DCNRCB have plate outside body. It gets support from its housing, so the bearing before fitting will be loose in the bore dimension. The outside diameter/hole in the housing needs to be made slightly smaller than the outside diameter of the bearing. Then make and use a top hat type mandrel with 1/8" shaft or 3mm shaft depending on which bearing you get and press fit the bearing into the housing. the bearing should be pressed from the side which have the bearing number stated, as that side of the outside plate is hardened. When you press the bearing in, the plate will compress (for want of word), allowing the needles of the bearing to come into correct contact with the shaft of the mandrel.

I used to hear of bearing slipping and failing to function properly. This was always as a result of poor understanding of how to fit this type of bearing, rather than the bearing itself.

Good luck.

Ketan at ARC

** Edit: I have not had any experience of the Chinese version of HF0306 for 3mm – so uncertain of its failure rate. Original HF0306 would be INA/FAG – Germany. RC02 original 1/8"- Torrington or its current owners KOYO only. 

Edited By Ketan Swali on 22/08/2023 16:46:42

Edited By Ketan Swali on 22/08/2023 16:48:05

[Oily RagParticipant @oilyrag]

Here are the photo's as promised!

I see you maybe looking for something a little less robust than this unit though, it transmits about 3 hp!

This is the original .unit, my replica is virtually identical but has some modifications and is made in EN40B and nitrided

[Oily RagParticipant @oilyrag]

One more photo showing all the components stripped out:-

[MichaelRParticipant @michaelr]

See here Link may be what you need.

[Philip Somers 1Participant @philipsomers1]

Many thanks to you all, the information you gave is ideal. This is the first time I have used this site.

Many thanks!

Phil

[CirclipParticipant @circlip]

Never ceases to amaze how many days of searching technical magazines and visiting the local(?) library have been saved by typing a word into a 'search' box and hitting the go button.

Regards Ian

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