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Old 01-19-2013, 01:50 AM   #1 (permalink)
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Delrin questions

So I've got an idea in my head to make a custom bolt for my Etek, but I've got some questions on delrin.

1) What is easier to work with, white or black delrin?

2) Where can I get straight up delrin?

3) Would I be able to get a certain length of a certain diameter of delrin from said distributor?
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Old 01-19-2013, 01:57 AM   #2 (permalink)
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Delrin is also known as acetal.

I believe the only difference between black and white is the dye.

Order Plastic Round Alloys Acetal, Acetal AF100 PTFE Fiber Filled, Acetal LF13 PTFE Powder Filled in Small Quantities at OnlineMetals.com

See above link.

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Old 01-19-2013, 10:40 AM   #3 (permalink)
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You'd be able to get it in standard diameters like 1/2, 5/8, 3/4 etc but you probably wont be able to get it in the exact diameter of your bolt. It would need to be machined.
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Old 01-19-2013, 10:51 AM   #4 (permalink)
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If you have a Grainger branch nearby, you can pick up a foot from them about the same price as ordering and paying shipping. As always though, check the pricing first. Sometimes there are some very high prices on what looks like common material, maybe due to odd sizes. 3/4" rod is relatively cheap.
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Old 01-19-2013, 11:09 AM   #5 (permalink)
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Quote:
Originally Posted by aresfiend View Post
So I've got an idea in my head to make a custom bolt for my Etek, but I've got some questions on delrin.

1) What is easier to work with, white or black delrin?
White has a superority complex. Just kidding, in the case with basic Delrin it is just a little carbon for color, some anecdotal differences maybe observed but otherwise they are the same. Some of the exotic varietys of Delrin are different colors and Delrin is available in other colors, and can be dyed (if white to start with).
2) Where can I get straight up delrin?
As mentioned delrin is known as acetal or POM, lots of plastic dealers will charge depending on what you are asking for. The differences are one is a co-polymer blend and the other is considered a homo-polmer blend, and between the two blends one has less occurances of centerline porosity. Just order it from McMaster Carr (online) or Grainger, either compnay will not try to bury you with the same details I just did.
3) Would I be able to get a certain length of a certain diameter of delrin from said distributor?
Yup you can get any diameter you can want, granted you may not be able to do anything with it. Depending on how much you need I can send you over a piece of two gratus.
See above.
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Old 01-19-2013, 03:56 PM   #6 (permalink)
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They both cut just fine, but the carbon used in the black Delrin may dull your cutting tool faster than the natural white colored.

McMaster-Carr is often the cheapest source for Delrin. Someone posted a music parts store here before that had awesome prices, but I can't remember what it was.
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Old 01-19-2013, 07:29 PM   #7 (permalink)
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Alright, thanks guys. Just wanna make sure on this last part, I want to turn it slowly with a sharp bit, correct?
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Old 01-19-2013, 07:32 PM   #8 (permalink)
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Nice and fast works fine with Delrin.

Can you grind your own tools?
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Old 01-19-2013, 07:40 PM   #9 (permalink)
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Check out musicmedic.com...free shipping and good prices.
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Old 01-19-2013, 10:53 PM   #10 (permalink)
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Can you grind your own tools?
At the moment, no.
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