Follow Rest for Standard Modern

PeterT

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Looks like bronze (and brass) balls can be purchased in various sizes. Spot a half sphere diameter into finger with ball EM, silver solder into place. Guess it depends on how often you see yourself replacing as to retention method
 

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Susquatch

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No to roller bearings. Maybe if I was turning at high speeds, but I won't be. Apparently they'll trap bits of swarf and imprint them on the surface of the material being turned.

I see. I can't really argue. Mine has roller bearings on both the steady and the follow rests. They are factory original. I've never experienced that, but I don't really use follow rests that much.

I guess I would have thought that a solid rest would be worse! But I've never used a solid rest so can't say for sure.

Interesting.
 

Mcgyver

Ultra Member
No to roller bearings. Maybe if I was turning at high speeds, but I won't be. Apparently they'll trap bits of swarf and imprint them on the surface of the material being turned.

Possibly, I didn't experience that. The problem with rolling element bearings is it takes a tiny bit of force to get them turning. That'll take you out a thou or two. If you are striving for accurate work, bronze is the way to go, or at least I've not found it wanting. It takes a bit of practice on the touch when using the travelling steady - you engage the fingers while things are moving after things have gone past the tailstock, that's where the touch comes in.

My DSG came with needle bearing rollers. I put new bearings in but it still wasn't sensitive enough. So finally I made the bronze fingers., photos of each on the previous mage

Peter, I wouldn't silver solder, it'll soften the bronze. Soft solder should be good enough. I just loctited some small bars in a steel housing to minimize the bronze consumption
 
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PeterT

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Good point on soldering.
Actually balls might be unnecessarily complicated. Maybe you could just drill a blind hole in the end of a finger, insert a section of bronze rod, retain it laterally with a set screw or whatever. The bronze could be customizable - tapered for smaller part stock, ball ended...
 

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thestelster

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Good point on soldering.
Actually balls might be unnecessarily complicated. Maybe you could just drill a blind hole in the end of a finger, insert a section of bronze rod, retain it laterally with a set screw or whatever. The bronze could be customizable - tapered for smaller part stock, ball ended...
That's exactly what I was planning!! Simple, versatile, and cheap!
 
As a quick comparison, different brands for similar Lathes have different selections with the main 2 being either a steel finger with a bronze contact point (replaceable or fixed?) or steel finger with a roller end (bearing or not).

Traditional would be solid, tried and true.

Modern being roller end.

I think the choice comes down to load and speed. Higher speed means rollers vs solid. At lower speeds and I suspect higher loads solid points.

As to precision I suspect solid being the choice.
 

Susquatch

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Perhaps one of the goals of your project should be to ensure that the design accomodates a range of end types. I believe it does now, but a bit of research might be in order.
 

Proxule

Ultra Member
Wouldn't Teflon be much too soft and not really provide support?
Not sure, I seen the old timer at the sawmill use it often, He did have spares setup. I never asked how long it lasted.
I know it has a very high melting point !

I was curious to your question, Seems others do it too?!
we use teflon PTFE on ours steady rest that is not taking heavy load (under 1000 pounds) it is way more wear resistant than bronze 660 and is going to take the heat anytime. ive put them on my steady rest 2 year ago and never see the shape change after all these year (ive use them 2 to 3 time a week) its kinda expensive but it worth it. just put some bardall on them before you put the shaft in the steady rest and it will go like a charm (or any kind of oil that is thick enought to stay on them)

Post #11 https://www.practicalmachinist.com/forum/threads/steady-rest-jaws-babbitt.251003/
 

phaxtris

(Ryan)
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Delrin (Acetal) would be another option, it is used for bushings and the like, self lubricating and very tough
 

thestelster

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Now to put this beast on a diet!
Of course it's to big to make a single cut, so I had to flip it. And I just aligned it by eye. I lucked out.
 

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thestelster

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Why didn't you just cut it with an OA Torch?
#1-I don't have oxy-acet, nor plasma
#2- that's 1"thick, 10" cut, haven't a clue how long it would take, and the air pollution in my garage!!?
#3-let the saw cut while I do other stuff.
 

Susquatch

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#1-I don't have oxy-acet, nor plasma
#2- that's 1"thick, 10" cut, haven't a clue how long it would take, and the air pollution in my garage!!?
#3-let the saw cut while I do other stuff.
#1 & #3 make sense.

#2 doesn't. OA will cut 10" of 1" plate like butter. Just need the right size cutting tip for the plate thickness and a relatively steady hand. I dunno, maybe a minute? Once you get the cut going, it goes pretty fast.

Main advantage is ability to cut curves. I'm not that good at it, but it's amazing to watch someone who is.

Of course a plasma table will do it even better.
 

Susquatch

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watch some of I C welds videos on youtube. His OA torch cuts look like they were milled out.

Ya, but I am no torch wizard. I'll be dead before I ever get that good!

FWIW, I don't have plasma. I just wish I did. Instead I make do with OA cuts that are a bit rough.

I'm happy though, cuz OA is fast and very flexible.
 
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