3D printed spindle liner bushings

GT-6 Racer

GT-6 Racer

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IMG_6741.jpeg


These slide into the spindle of my Haas TL1. For 15/16 bar I use for my Deckel Pull studs. I run 3 of them. Snug sliding fit in the bar and O-rings on the interface to the spindle bore. Also have a 1/2” set for bars for my pen production.

IMG_6742.jpeg

Safely and comfortably run 3 foot bars with no vibration.

I highly recommend doing this. Next will be a set for my 10EE.
 
GT-6 Racer said:
View attachment 498420

These slide into the spindle of my Haas TL1. For 15/16 bar I use for my Deckel Pull studs. I run 3 of them. Snug sliding fit in the bar and O-rings on the interface to the spindle bore. Also have a 1/2” set for bars for my pen production.

View attachment 498421
Safely and comfortably run 3 foot bars with no vibration.

I highly recommend doing this. Next will be a set for my 10EE.
Click to expand...
Nifty idea, more elegant than a spider. Maybe add a flange on one end to make them easier to remove?
 
I certainly could add a flange on the outer one. I just open the chuck and take a rod and bump them out with a rubber mallet. 3 spaced along the length of the spindle bore.
 
Adding a flange sounds like a good idea. For now, using a rod and a rubber mallet to bump them out seems practical. Ensuring they're spaced evenly along the spindle bore will help with stability. Keep up the good work!
 
GT-6 Racer said:
View attachment 498420

These slide into the spindle of my Haas TL1. For 15/16 bar I use for my Deckel Pull studs. I run 3 of them. Snug sliding fit in the bar and O-rings on the interface to the spindle bore. Also have a 1/2” set for bars for my pen production.

View attachment 498421
Safely and comfortably run 3 foot bars with no vibration.

I highly recommend doing this. Next will be a set for my 10EE.
Click to expand...
That is a great idea! I will have to give it a go sometime.
 
Nice work!

That, of course, got my engineering brain rolling around mode shapes and optimal restraint locations... it would be like the Airey (sp?) Points for straight edges and surface plates. You just have to remember that the collet is a fully fixed node; no rotation. The bushings restrict the bar to the center line, but don't stop rotation away from the center line.

Anyway, three is going to be very close to what you would get with a full length bushing. As a bonus they will suppress flap inside the spindle when the stick gets short!

Sent from my SM-S911U using Tapatalk
 
Yes exactly. Longest unsupported length is about 8” or so. Really cut down on vibrations above 2000 rpm. 1/2 “ aluminum bars 3 feet long were not possible. Big boy spindle liners are cost prohibitive for hobby work. Made the first ones on the lathe from some scrap nylon rod, but these 3D printed ones are way cheaper and work just as well. Ordered a chunk of ABS rod to turn out a few more. Then the just-print-it idea hit me.
 
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