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Old 02-28-2019, 04:51 PM   #1 (permalink)
 
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Default Bushings vs. Calipers

Curious about using calipers rather than bushings. Is this a thing?



I want to make a one-off pen, of a style that I'm likely not going to do for anyone else, and I'd have to get a new bushing set for it. But I'm feeling a little tired of buying bushings.... Is there a reason not to just use calipers to get the final dimension?


Or, measure the kit with the calipers and then find a bushing from another set that matches it? I feel like somewhere, I must have a bushing the right size....



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Old 02-28-2019, 05:04 PM   #2 (permalink)
 
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This is a pretty common practice the only issue being that if you use a mandrel you will need bushings to keep the tube centered.

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Old 02-28-2019, 05:16 PM   #3 (permalink)
 
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No reason not to just turn it between centers and use calipers to get it right. Another method some have used is to make some temporary bushings from corian or a dense hardwood. Bushing should only be used to get close to size anyways. Finish turning and sanding between centers without bushings will keep the blanks from getting contaminated from metal dust from the bushings.
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Old 02-28-2019, 06:27 PM   #4 (permalink)
 
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I pretty much switched to calipers only, saves me the hassle and expense of buying and storing bushings. Plus I think I get a better fit. Definitely can take a little more time.
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Old 02-28-2019, 06:28 PM   #5 (permalink)
 
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Also, just get a dead center and TBC, then you don't even have to worry about having a bushing with the right tube dia.
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Old 02-28-2019, 06:54 PM   #6 (permalink)
 
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Quote:
Originally Posted by Dehn0045 View Post
Also, just get a dead center and TBC, then you don't even have to worry about having a bushing with the right tube dia.

TBC? What's that?
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Old 02-28-2019, 07:17 PM   #7 (permalink)
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TBC = Turn Between Centers. It is best to think of bushings as suggestions. Bushings wear and it doesn't take long for them to be a smaller diameter than they should be. A good set of calipers will get you to the right diameter every time. But, it can take a lot longer
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Old 02-28-2019, 07:24 PM   #8 (permalink)
 
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Oh, I see. So, the dead center is the on the drive end, and then my stock live center on the tail, or do I need a cone center on the tail as well?



In other words, what is the lathe setup for this?
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Old 02-28-2019, 07:28 PM   #9 (permalink)
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This should help


https://www.youtube.com/watch?v=U3RJQ4rZOHE
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Old 02-28-2019, 07:47 PM   #10 (permalink)
 
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Helpful, thanks.
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