martin perman | 12/11/2018 18:33:18 | ||
![]() 2095 forum posts 75 photos | Gentlemen, I am going to make four 2.5" rollers for a friend with .5" axles using silver steel what drill size could I use to get a light press fit or would I need to ream the hole .5" Martin P | ||
vintage engineer | 12/11/2018 18:37:16 | ||
![]() 293 forum posts 1 photos | As a rough guide you need the hole .001" per inch undersize. So you need to make the holes .0005" under the size of the silver steel. So measure the silver steel first then set your reamer to cut as above. I would make a test hole first. | ||
Speedy Builder5 | 12/11/2018 18:52:33 | ||
2878 forum posts 248 photos | You would be very lucky to get an accurate fit by drilling. You would have to ream or accurately bore the holes. Again, you would have to measure the actual diameter of the shaft and from that select the correct reamer 'Fit'. However, most of us probably have the generic H8 reamer and instead of passing the reamer through the hole, just use the bottom end of the reamer (The tapered section) and by trial and error open up the hole to get the push fit you require. Note, not all lengths of silver steel are the same diameter - it is ground within limits.
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John Rudd | 12/11/2018 20:13:49 | ||
1479 forum posts 1 photos | You could make the holes undersize, then heat the parent metal to allow a sliding fit for alignment | ||
Mick B1 | 12/11/2018 21:14:24 | ||
2444 forum posts 139 photos | Can you duck the issue with a tapped side hole and a grubscrew? | ||
martin perman | 12/11/2018 21:51:37 | ||
![]() 2095 forum posts 75 photos | Its an antique butter churn which my friend drives with a stationary engine, we are replacing the rollers which the drum sits on so I would like it as original as possible so grubscrew wouldn't match the look I have adjustable reamers so I can ream to size, I wasn't sure of the tolerances. Thank you, Martin P | ||
Hopper | 12/11/2018 21:58:16 | ||
![]() 7881 forum posts 397 photos | Could you turn the roller and axle protrusions out of one piece of 2.5" round material? Would save a lot of work. | ||
martin perman | 13/11/2018 07:49:22 | ||
![]() 2095 forum posts 75 photos | Posted by Hopper on 12/11/2018 21:58:16:
Could you turn the roller and axle protrusions out of one piece of 2.5" round material? Would save a lot of work. Forgot to mention that the roller is made of brass. You have all pointed me to the right way, thank you. Martin P | ||
Chris Evans 6 | 13/11/2018 09:24:15 | ||
![]() 2156 forum posts | Loctite 638 is your friend. | ||
Ian S C | 13/11/2018 09:58:00 | ||
![]() 7468 forum posts 230 photos | I agree with Chris Evans, Loctite is by far the easiest way to go. You better make sure that the brass is lead free in a food environment. Ian S C | ||
Michael Gilligan | 13/11/2018 10:09:30 | ||
![]() 23121 forum posts 1360 photos | Posted by martin perman on 12/11/2018 21:51:37:
Its an antique butter churn [ ... ] I would like it as original as possible . Chris/Ian I am [as you might expect] with you on the matter of Loctite 638 ... But I assumed that Martin must have discounted it, on principle. MichaelG. Edited By Michael Gilligan on 13/11/2018 10:10:00 | ||
martin perman | 13/11/2018 10:10:04 | ||
![]() 2095 forum posts 75 photos | Posted by Ian S C on 13/11/2018 09:58:00:
I agree with Chris Evans, Loctite is by far the easiest way to go. You better make sure that the brass is lead free in a food environment. Ian S C Thank you all again, Ian, I liked your comment about being lead free, the Butter churn will not see milk in it again as its purely for display only
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martin perman | 13/11/2018 10:29:03 | ||
![]() 2095 forum posts 75 photos | Posted by Michael Gilligan on 13/11/2018 10:09:30:
Posted by martin perman on 12/11/2018 21:51:37:
Its an antique butter churn [ ... ] I would like it as original as possible . Chris/Ian I am [as you might expect] with you on the matter of Loctite 638 ... But I assumed that Martin must have discounted it, on principle. MichaelG. Edited By Michael Gilligan on 13/11/2018 10:10:00 MichaelG, Its a simple task and 638 is a simple solution, there are no serious loads involved and means making the job easier |
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