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Old 10-27-2010, 12:08 AM   #1
kcmillin
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Default Gluing Delrin

What, if any, type of glue can I use to join two pieces of delrin (acetal)?

Will a press fit hold nicely?

I am trying to come up with a design for a distributer cap.

Kel



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Old 10-27-2010, 12:52 AM   #2
Brian Rupnow
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Default Re: Gluing Delrin

I don't think you can glue Delrin.



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Old 10-27-2010, 01:25 AM   #3
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Default Re: Gluing Delrin

Quote:
Originally Posted by kcmillin
What, if any, type of glue can I use to join two pieces of delrin (acetal)?

Will a press fit hold nicely?

I am trying to come up with a design for a distributer cap.

Kel
Hi Kel, you could try some Bondit b45th. I think McMaster Carr might carry it.

http://www.reltekllc.com/bondit-b45th.html

Don't know what all of this below means, but it was fun reading.

http://en.wikipedia.org/wiki/Acetal

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Old 10-27-2010, 01:44 AM   #4
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Default Re: Gluing Delrin

Here is something that may work. Etching the surface's seems to be a necessity.

http://www.loctiteproducts.com/products/detail.asp?catid=17&subid=40&plid=661


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Old 10-30-2010, 06:56 PM   #5
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Default Re: Gluing Delrin

I followed Evan Williams' guide to making leadscrew nuts from Acetal by heating the leadscrew with a heat gun and it welded the two halves of the nut together very well. Might be possible to do a variation of this?

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Old 10-30-2010, 08:21 PM   #6
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Default Re: Gluing Delrin

Delrin is usually welded.

When I was in work. we used to have cleaning tanks welded up out of delrin sheet.


Bogs

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Old 11-17-2010, 11:12 PM   #7
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Default Re: Gluing Delrin

Nothing to add on the glueing question, but you might want to check into the moisture absorbtion of DELRIN. Might make it a poor choice for a distributor cap.

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Old 11-17-2010, 11:56 PM   #8
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Default Re: Gluing Delrin

I've done a bit of prototype work and a lot if injection molding of Acetal (Delrin is tm). I never have bonded parts but if I can explain this, have created a mechanical "lock" made of epoxy.
If you have a shaft in a bushing. Groove the i.d. of the bushing and at the same location, groove the shaft. Assemble with those grooves full of epoxy and at the right location. You essentially have a solid o-ring and neither part can move. I've done that with a lot of dis similar materials, no threading and it doesn't take much of a groove.
Delrin doesn't absorb much moisture but for heat resistance and electrical situations I have used Ultem. Very machinable, good temperature resistance, expensive but I use onlinmetals and they cut short pieces. Ten buck for a foot of 1" dia.
I am new to forums, can I mention a supplier??

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Old 11-18-2010, 01:47 AM   #9
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Default Re: Gluing Delrin

I've made distributor caps from Delrin. They work great. Don't work well wet though. Need to dry out after cleaning.

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Old 04-09-2013, 01:55 PM   #10
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Default

Hi,

I just tried Plastic Weld from Plastruct. No good.



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