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Nylon sheets (Read 432 times)
 
Gordon Prill
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Nylon sheets
Sep 6th, 2016 at 11:31pm
 
I'm going to make a steady rest for my new Laguna 1836. I have made one before out of wood for my old Powermatic 90. With the larger swing I wanted something more beefy made from metal. I am going with Jeff Styles design here, Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to Login or Register. I am going to use 1/4 inch flat metal for the base and add 1/4 inch nylon sheet under that where it contacts the bed ways, so I don't scratch or gouge the ways by accident or frequent use. Anyone use Nylon in this fashion? I was wondering how it will hold up, or could it cause it to wobble? From what I have read it seems like tough stuff and perfect for this application. Thanks.
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Ken Vaughan
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Re: Nylon sheets
Reply #1 - Sep 7th, 2016 at 4:33am
 
Gordon,

Are you familiar with the "law of unintended consequences"?

Nylon adds to the risks of invoking that concept.

The nylon does not attach to steel easily, and it tends to imbed sharp mineral pieces called abrasive grit more easily than steel.  It will start out slick and tend to slide, then as it loads up with imbeded materials will gain friction as the abrasives grab. 

Cleaning the welding splatter and deburring the steel will be faster, avoid connection issues with dissimilar materials, likely will polish the ways less.

Even steel and cast iron will inbed abrasives, but a lot less than plastics (nylon). 

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Tom Hamilton
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Re: Nylon sheets
Reply #2 - Sep 7th, 2016 at 10:45am
 
What Ken said.

Don't do it, use steel, round and sand the edges and you won't have an issue.

Nylon will flex.

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Glenn Jacobs
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Re: Nylon sheets
Reply #3 - Sep 7th, 2016 at 12:06pm
 
Nylon will cold flow under pressure.
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Ed Weber
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Re: Nylon sheets
Reply #4 - Sep 7th, 2016 at 12:07pm
 
Taking into consideration what the other have said, I'll add this.
If you're looking for some type of material to "pad" the unit there are certainly options. You can always use a hard wood species or a UHMW product.
If you wipe the ways clean (as you should) you shouldn't have any issues with debris embedding itself into the material. This is after all a steady rest, typically not moved around all that much. I don't think you should have any problems with an occasional re-positioning.
JMO
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« Last Edit: Sep 7th, 2016 at 12:08pm by Ed Weber »  
 
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Dwight Rutherford
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Re: Nylon sheets
Reply #5 - Sep 7th, 2016 at 12:51pm
 
I have used a Jeff Nicol type steady for years. I clean the base and lathe ways each time it is used. It has never scratched the lathe ways. Your banjo is a metal to metal fixture that is constantly moved and tightened. As long as you keep your lathe clean there is no reason for scratches.
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Gordon Prill
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Re: Nylon sheets
Reply #6 - Sep 7th, 2016 at 11:41pm
 
I was afraid I might get some flex and didn't think about getting material embedded in it. Thanks for the insight. I think I'll just use 1/4 or 5/16 base plate.
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Ed Weber
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Re: Nylon sheets
Reply #7 - Sep 8th, 2016 at 9:27am
 
Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to Login or Register
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Ken Vaughan
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Re: Nylon sheets
Reply #8 - Sep 8th, 2016 at 12:52pm
 
Gordon Prill wrote on Sep 7th, 2016 at 11:41pm:
I was afraid I might get some flex and didn't think about getting material embedded in it. Thanks for the insight. I think I'll just use 1/4 or 5/16 base plate.


With that thickness and the short lengths should be very small deflections.  Light drawfiling and a scotch brite cleanup with an angle grinder you will be set for the next 20 years or so.

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Ralph Fahringer
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Re: Nylon sheets
Reply #9 - Sep 8th, 2016 at 1:26pm
 
I remember using nylon sheets once... We slid off of the bed onto the floor!!! Thumbs Up Thumbs Up Grin Grin Grin
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Ed Weber
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Re: Nylon sheets
Reply #10 - Sep 8th, 2016 at 3:16pm
 
Gordon Prill wrote on Sep 6th, 2016 at 11:31pm:
Anyone use Nylon in this fashion?

There are better materials than nylon

Glenn Jacobs wrote on Sep 7th, 2016 at 12:06pm:
Nylon will cold flow under pressure.

Tom Hamilton wrote on Sep 7th, 2016 at 10:45am:
Nylon will flex.

Gordon Prill wrote on Sep 7th, 2016 at 11:41pm:
I was afraid I might get some flex


I'm having a hard time understanding where you think this "flex" will come from.
As I have mentioned a UHMW product (made for this type of application) like Multimedia File Viewing and Clickable Links are available for Registered Members only!!  You need to Login or Register
can be as thin as 1/64". If adhered to the base plate, then the base plate mounted to the ways, where is this "flex" coming from? You would have to compress a portion the product which is almost impossible in this application. This is after all a steady rest, what type of stresses do you thing you'll be putting it under that would cause the base to flex?

I know you'll make it however you want, I'm just offering suggestions. There are products available that not everyone is aware of.
Good luck with your build.
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