Bushing for 100C, 212F, replace PEEK with cheaper polymer?
Bushing for 100C, 212F, replace PEEK with cheaper polymer?
(OP)
Hello.
I am thinking of if there is a cheaper polymer than PEEK for a bushing.
The max surface pressure is 20Mpa 2.9psi.
The motion can be described as slightly pivoting.
And the shape of the bushing is:
Inner diameter = 15mm , 0.6 inch
Thickness = 1.5mm , 0.06 inch
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They are going to be injection moulded.
We will do around 300 000 pieces but the most will done in POM for lower temperature applications.
Thanks
I am thinking of if there is a cheaper polymer than PEEK for a bushing.
The max surface pressure is 20Mpa 2.9psi.
The motion can be described as slightly pivoting.
And the shape of the bushing is:
Inner diameter = 15mm , 0.6 inch
Thickness = 1.5mm , 0.06 inch
/| |\
|| ||
\| |/
They are going to be injection moulded.
We will do around 300 000 pieces but the most will done in POM for lower temperature applications.
Thanks





RE: Bushing for 100C, 212F, replace PEEK with cheaper polymer?
Regards
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RE: Bushing for 100C, 212F, replace PEEK with cheaper polymer?
I forgot to say that they must be food grade.
I don't think they are food grade?
RE: Bushing for 100C, 212F, replace PEEK with cheaper polymer?
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Bushing for 100C, 212F, replace PEEK with cheaper polymer?
RE: Bushing for 100C, 212F, replace PEEK with cheaper polymer?
What expected life.
Pure water, typical water supply water or something else.
Nylon 66 will degrade in water at 100 deg C
I would need to look up some tables to determine the rate.
Unfortunately the best heat and hydrolysis stabilisers loose the food contact status.
Life would be a lot easier if you stated most of the requirements up front instead of bringing them out one at a time.
Regards
eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: Bushing for 100C, 212F, replace PEEK with cheaper polymer?
We use this in down-hole (oil/gas) drilling situations where there is oil, water, gas etc at temperatures up to 140 C without problems but the fiber is important.
Cheers Geoff
PS I'm assuming that the 2.9 psi is the correct pressure?
RE: Bushing for 100C, 212F, replace PEEK with cheaper polymer?
Some cheaper alternatives to consider:
PPA (LNP and others)
PPS (Glass and PTFE filled) - e.g. Ticona Fortron
Partially aromatic nylons such as Grivory made by EMS Chemie.
PPA has a narrow processing window but any half-decent moulder should be able to run it.
PPS needs 135 Deg C tool temp so unless tool is insulated and/or elecrtically heated choose last...
Grivory has potable water approvals in the EU - you will have to check with manufacturers for the others.
Cheers
Harry