pawelcen Posted August 5, 2022 Author Share Posted August 5, 2022 That's right Ron. I must paint. Thank you. Pawel Quote Link to comment Share on other sites More sharing options...
pawelcen Posted August 8, 2022 Author Share Posted August 8, 2022 Hi, in the meantime, I had to repair the clutch. As you can see in the photo, there were not enough rolls and they had a diameter of 6mm(!). They destroyed the clutch bearing. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted August 8, 2022 Share Posted August 8, 2022 (edited) Pawel. Bare in mind that the clutch rollers for a Triumph are not the standard 1/4 x 1/4 rollers. They are in fact about 12 thousands of an inch shorter in the length. The standard rollers will give you no end of trouble and grinding of gears. Ron PS you can of course grind some off the end of 1/4" rollers. https://draganfly.co.uk/shop/70742/clutch-roller-1596669875/#57-0394 Edited August 8, 2022 by Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted August 8, 2022 Author Share Posted August 8, 2022 (edited) Thank you Ron. I remember. Thanks to a colleague who has machine tools, I designed and regenerated the bearing in accordance with the technology from the 1950s. From calculations it turned out that 17 rolls must be 7.5mm in diameter. The play between the rollers is 0.03 mm. Outer diameter 48.5 mm. Inner diameter 35.5 mm. Roll length 5.83 mm (play 0,1 mm). Repair description: 1. Outer ring after grinding the hole and surfaces 2. Machining of the inner ring of the bearing 3. Cutting rolls to the correct length with an allowance 4. Surface grinding of a set of 17 rollers 5. Grinding the side of the roll 6. Each piece quality control 7. From left 3 long bearing rollers, 3 partially machined rollers, 17 finished rollers 8. Clutch bearing after repair. Pawel Edited August 8, 2022 by pawelcen 2 Quote Link to comment Share on other sites More sharing options...
welbike Posted August 8, 2022 Share Posted August 8, 2022 Pawel, I see you made the roller thickness bigger, so you could use the existing (damaged) parts, is there still enough hardness left in the material? I seem to remember with the 6,35 rollers, there was a bit bigger gap between the rollers, but it's probably OK. Good work! Lex Quote Link to comment Share on other sites More sharing options...
pawelcen Posted August 8, 2022 Author Share Posted August 8, 2022 Thanks Lex, I was counting according to the scheme given by prof. Trzebiatowsky. 40 years ago I regenerated the clutch for my other Triumph according to these calculations. Today it looks like the picture, so I guess I figured it out well. There was less damage there and the rollers were about 6.5 mm. Regards Pawel 2 Quote Link to comment Share on other sites More sharing options...
welbike Posted August 9, 2022 Share Posted August 9, 2022 Ok, I vaguely remember something about the crowded rollers effect, but that may be more for bigends? Nice work, and am sure it will last! Lex Quote Link to comment Share on other sites More sharing options...
pawelcen Posted August 9, 2022 Author Share Posted August 9, 2022 Thanks Lex. Hope it works well. The hardness of the outer ring is ok. The inner ring was also hard when machined. Unfortunately, not like the outer. Pawel Quote Link to comment Share on other sites More sharing options...
welbike Posted August 9, 2022 Share Posted August 9, 2022 (edited) OK, well, you have to keep in mind, that probably 90-95% of the time this bearing is not in use, well only as a spacer, the 2 parts only turn at different speeds when the clutch is disengaged. So it will last, as long as you keep some grease on it. Lex Edited August 9, 2022 by welbike additional info Quote Link to comment Share on other sites More sharing options...
pawelcen Posted September 20, 2022 Author Share Posted September 20, 2022 Hi, I have the option to buy a 3H engine with a gearbox and clutch from 1943. Can I convert a 3 SW engine to a 3H motor? I would have one military s.v. and a second civilian o.h.v. Or maybe it's better to leave s.v.? What do you think about it? Work on the military is progressing. Unfortunately slow. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted September 20, 2022 Share Posted September 20, 2022 Pawel as you probably already know, the same frame was used for 3SW- 5SW -3HW. so an engine swap is straight forward. But if you're asking about converting a 3SW engine to 3HW? Then I'd want to study the crankcases to see about push rod tube allignment etc. Also the conrods/pistons are different. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted September 20, 2022 Author Share Posted September 20, 2022 Hi Ron, I want to change the whole engine, gearbox and the primary chain cover with clutch. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted September 20, 2022 Share Posted September 20, 2022 Yes that is a straight forward swap. You can use either the tin or ally cases. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted November 30, 2022 Author Share Posted November 30, 2022 Hi, Next question: what does the ball race cup (in figure 16) look like? My front fork is 3HW and some parts are missing. Surely they weren't needed?😂 Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted November 30, 2022 Share Posted November 30, 2022 (edited) That is not a cup Pawel, it's a cap.You have two cups and two cones for the balls to run in. Then a top cap as a dirt excluder/Watershed...... Like a large washer with the edge turned over. Edited November 30, 2022 by Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted November 30, 2022 Author Share Posted November 30, 2022 Thank's Ron, Of course it's a cap. 😀 Does it have a hole or groove for lubrication? There is a grease hole in the head clip and a second for positioning (?) cap. There is also a groove in the bearing cone. I don't know if it's original. Regards Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted November 30, 2022 Share Posted November 30, 2022 Is that a 3HW Webb fork top clip? It looks more like a Triumph part?? You can clearly see the hole in this scan, and my top clip with the grease nipple on the right side. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted November 30, 2022 Author Share Posted November 30, 2022 I dont know? My top clip is not a same. Top view in the foto. It's only one grease nipple. Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted December 1, 2022 Share Posted December 1, 2022 I don't know then? If that is a Triumph part? Is it wide enough for 3HW forks? I'll take a picture later, but the Triumph clip has 2 nipples I think but not the same as 3HW. Ron Quote Link to comment Share on other sites More sharing options...
Ron Posted December 1, 2022 Share Posted December 1, 2022 Here is the Triumph top part. Still with two nipples but different orientation. Ron Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 2, 2022 Author Share Posted December 2, 2022 (edited) Sorry Ron, for not replying but I didn't have access to the forum. After restarting the computer and refreshing the software, it works.😀 This top part of mine has a different lubrication. ???? One grease nipple is cheaper than two. Maybe it's savings in the war time? Eccentric bolt, nut and sleeve (clamps 6, 7, 😎 it's a same like in the picture for 3HW. Also the steering damper (22, 23, 24, 25, 26, 27) is the same as for 3HW. The top part from India is similar to yours, but the clamp is different. The widths are the same as the fork: 154.9 mm and 162.2 mm. My old and Indian copy are the same width. Old is green in the pictures. Blue is an Indian copy. Pawel Edited December 2, 2022 by pawelcen Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 2, 2022 Author Share Posted December 2, 2022 Hi, the automatic corrector refuses to accept the number 8 and replaces it with the "Blues Brothers"😎. Quote Eccentric bolt, nut and sleeve (clamps 6, 7, 8)... Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted December 2, 2022 Share Posted December 2, 2022 Yes the site was shut for upgrades for 24 hours. But I'm confused with your pictures and measurements? The WEBB forks fitted to 3HW are much wider (Aprox 159mm between the top links) than the Triumph forks on the SW models. (Aprox 126mm between top links) Your green forks are not 3HW but your blue forks are?? How can they be the same width? Ron??? Quote Link to comment Share on other sites More sharing options...
pawelcen Posted December 2, 2022 Author Share Posted December 2, 2022 Hi Ron, it's a mystery to me. Or maybe the top part is not from Triumph, but from another English motorcycle? Pawel Quote Link to comment Share on other sites More sharing options...
Ron Posted December 2, 2022 Share Posted December 2, 2022 No Pawel, my confusion is the actual forks. If I'm reading this correctly? Your green forks are Triumph, Your blue forks a replica Webb forks. But you say they are the same width.....That can't be so! Ron Quote Link to comment Share on other sites More sharing options...
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