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Aug 13, 2022 - 11:44:03 AM

mander

USA

4986 posts since 10/7/2007

I was cleaning my room and came across my rotary tool, and thought, hey! I have a project that is tons more fun than cleaning my room!
So, I got distracted. The object I'm "improving" is made of some kind of resin. I see bits for glass, stone, wood, metal, all purpose, nothing lists resin specifically. Any suggestions on what kind of tool bit to use for craving/grinding resins?

Aug 13, 2022 - 1:33:21 PM

2887 posts since 5/2/2012

I have been watching a lot of youtube videos on working with polishing stone, which may transfer over to resin. First of all, you will need good eye and breathing protection. Second, work a a slow speed to keep things from overheating. Those who work with a dremel on stone also use water (on the stone and/or on the bit) to keep things cool.

I imagine you could use any number of bits, like carbide burs, grinding stones, coated diamond burs, or even sandpaper, to do the coarse work. Then you have the polishing part, which can be done with rubber or silicone burs impregnated with some type of polishing compound (like diamond). Or even really super fine grades of sandpaper You might look (like on ebay) for dental diamond burs, as they seem pretty inexpensive.

Edited by - thisoldman on 08/13/2022 13:34:59

Aug 13, 2022 - 1:53:21 PM

2887 posts since 5/2/2012

Got to thinking that for polishing you might have a felt wheel in your kit, and use that with polishing compound.

Aug 18, 2022 - 5:08:03 AM
Players Union Member

rinemb

USA

14855 posts since 5/24/2005
Online Now

I messed with some resin knife handles once. Discovered that it does not not take much friction and heat to melt it. So I would be cautious at first with rotary speed and pressure with and grinding or polishing. Brad

Aug 18, 2022 - 5:13:05 AM
Players Union Member

rinemb

USA

14855 posts since 5/24/2005
Online Now

One other caution. I was using a tabletop belt sander to shape the resin knife handles mounted on my knife, and soon a fire started inside my sander. The accumulation of saw dust in there hit with too hot resin dust started the fire. Sparks from sanding on the rivets or knife tang may have been the igniter? Brad

Aug 18, 2022 - 9:30:01 AM

76666 posts since 5/9/2007

Regular sanding drums or diamond bits for resin.Soft and easily sanded.

Aug 19, 2022 - 7:36:57 AM

76666 posts since 5/9/2007

Wear a good mask or have a dust extractor.

Aug 19, 2022 - 1:24:53 PM

mander

USA

4986 posts since 10/7/2007

Thanks All! Good advice noted! I forgot to take a "before" picture, but I will attempt to take a stage picture and post it.

Aug 19, 2022 - 1:35:27 PM

59474 posts since 12/14/2005

quote:
Originally posted by rinemb

One other caution. I was using a tabletop belt sander to shape the resin knife handles mounted on my knife, and soon a fire started inside my sander. The accumulation of saw dust in there hit with too hot resin dust started the fire. Sparks from sanding on the rivets or knife tang may have been the igniter? Brad


Is that YOU in the video??

Aug 20, 2022 - 6:37:57 AM

76666 posts since 5/9/2007

A common heat problem with dremel bits is to continue to use them after they've gone dull.

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