RayT Posted November 18, 2023 Share Posted November 18, 2023 My morris has some badly pitted loose needle roller bearings in the gearbox . None of the bearing suppliers can supply the size. Could dowel pins be used instead, would they be hard enough? Quote Link to comment Share on other sites More sharing options...
osiford Posted November 18, 2023 Share Posted November 18, 2023 Needle rollers are hardened, so it is unlikely that dowel pins will last very long. What is the size of needle you are looking for? Quote Link to comment Share on other sites More sharing options...
RayT Posted November 18, 2023 Author Share Posted November 18, 2023 Dowel pins are hardened, but how hard in comparison I don't know. Sizes are 1/8 × 1 and 1/8 x 1 1/4 Quote Link to comment Share on other sites More sharing options...
ruxy Posted November 18, 2023 Share Posted November 18, 2023 2 hours ago, RayT said: My morris has some badly pitted loose needle roller bearings in the gearbox . None of the bearing suppliers can supply the size. Could dowel pins be used instead, would they be hard enough? Bearing suppliers you have contated - I take-it they can't supply spare needle rollers ? There must be needle bearings (complete) with correct dia. rollers , then you just scrap new bearings and reclaim the rollers - plenty of local toolrooms could the use a cutter-grinder to chop these rollers to the desired length. Obtain a INA Bearings technical catalogue to trawl through. Incidently - many years ago I worked on Brewne & Sharpe single spindle autos, these had split needle bearings for headstock spindles , this allowed quite a rapid change over from conventional lathe spindle to eccentric turning (the lathe did a quick-reverse that threw the spindle into eccentric. The only case I have known of this precision type bearing being spit construction. 1 Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted November 18, 2023 Share Posted November 18, 2023 4 hours ago, RayT said: Dowel pins are hardened, but how hard in comparison I don't know. Sizes are 1/8 × 1 and 1/8 x 1 1/4 Hi Ray, Not sure what model Morris you have, but going through the C8 parts list I think I have identified your bearings and have manufacturers part numbers. You say 1/8" x 1 1/4", that would be Morris part no. C868 and a quantity of 59 rollers for the 2nd speed constant mesh gear. Manufacturers part numbers: Ransome & Marles part no. N.125 x 1 1/4" Hoffman part no. B.2785 Skefko part no. 125 x 1 1/4 The 1/8" x 1" rollers are Morris part no. C.681 for the stem gear on gearbox mainshaft, a qty of 28: (the diameter is actually 0.1248") Ransome & Marles part no. N.1248 x 1 Hoffman part no. B.4767 hope this is is help to you. regards, Richard 2 Quote Link to comment Share on other sites More sharing options...
RayT Posted November 18, 2023 Author Share Posted November 18, 2023 Thanks Richard, brilliant bit of info. I didn't realise there is a parts manual about, very handy information. Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted November 18, 2023 Share Posted November 18, 2023 Hi Ray, The parts list gave the Morris part numbers and an army stock number, I cross referenced the army number in the LV6MT7 Vocab - Bearings and the makers part numbers came up. I am sure if you look on a search engine you will find bearing stockists who can help. I have done this successfully in the past. Quote Link to comment Share on other sites More sharing options...
Grego Posted November 28, 2023 Share Posted November 28, 2023 I've used the correct size gauge pins cut down to the proper length to replace 3 of the 880 loose needle bearings in my Ferret. So far no issues. 1 Quote Link to comment Share on other sites More sharing options...
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