Mini Lathe Basics Machining To A SHOULDER
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- Опубликовано: 10 июн 2021
- This is Part 6 in the Mini Lathe Basic series. In part 6 we will cover Turning to a SHOULDER and attempt a situation where you may need to use this in the shop.
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• Mini Lathe Basics
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cheers Joe, I have had a go a couple of times at bearing seats and always end up going "just under" it is frustrating!
Yeah it is annoying. I’ll know next time to measure the inner race more accurately and measure more as I come to final pass. Practise makes perfect though
ive had this issue too, turns out its the temperature of the metal, machining without coolant makes it expand. So you end up taking too much off and that makes the difference between a losse fit and a tight press fit after the metal has cooled. Everything looks right when machining but when doing tolerance fits, think of the heat expansion.
@@jamie15able Interesting point. I imagine you maybe correct it is something I’ll test out next time I’m doing a job like this again. 👍
Knurl it a bit that will fix the slop
I will have to try that method and see how I get on with it. Thank you.
8:45 That bearing's a sloppy fit !
You caught me out. I went a bit undersize on the shaft. Damn thermal expansion
@@MachiningwithJoe Caught you out in a few places with your jump cut video editing ;) DROs that suddenly read zero :)
Thermal expansion ? Not THAT much ! What is it, 3-5 thou under size ? Oh yeah, we don't use those funny metric units ! Should have been aiming for a light interference fit (when cold - LOL)
@@millomweb yeah I’m still learning how to hit dimensions bang on. But the basic procedure for turning a shoulder is right I believe.
With more experience I’ll get there.
@@MachiningwithJoe You have to sneak up on them ! At 10 thou oversize, measure to confirm, take a 5 thou finishing cut, measure to see if it is 5 thou and if it is, just repeat with another 5 thou cut.
I'm not aware a technique is necessary, LOL Get the diameter to size and then finally pull out to face the shoulder.
@@millomweb Think with a few more trials I’ll get there. Thank you for the advise.
All the best 👍