peek plastic

[JMahon]

Anyone cutting this stuff? Any tips or tool mfg suggestions?

[kccadcam]

Anyone cutting this stuff? Any tips or tool mfg suggestions?

We run this material all the time.

Just use good sharp carbide tools (2 or 3 flute)

The main issue with PEEK (other than it's REALLY expensive) is it's prone to chipping.

Drive toolpaths accordingly, especially leading off the cut.

[T_MALENA]

Coated Aluminum style cutting tools.  Treat the tool paths like you would cutting carbon fiber - lead into the cut - leadout is even more important. Never a heavy cut when coming off the part. When drilling thru make sure there is 100% support under the drill - as in a virgin alum block under each part when drilling thru holes. PEEK chips out & pops. Its abrasive too. Have used diamond grit grinding mills with excellent sucess BUT you must use a serious vacuum.

[JMahon]

What about speeds/feeds? Harvey tool is showing 800-1200sfm...

I forgot to mention it's medical grade peek. Not sure if it's any different ?

[kccadcam]

http://www.boedeker.com/fabtip.htm

 

http://www.drakeresearch.com/page/Machining_PEEK_Plastics_Guide

 

 

[JMahon]

Cool thanks!

[dstryr]

I use this place for deburring on parts where its a very deep cavity with small corner radius. They are very affordable, quick turn around. Not worth doing it in house.

 

http://www.nitrofreeze.com/services/deburring/cryogenic-deburring/

[The Cathedral]

I use this place for deburring on parts where its a very deep cavity with small corner radius. They are very affordable, quick turn around. Not worth doing it in house.

 

http://www.nitrofreeze.com/services/deburring/cryogenic-deburring/

 

We literally just got back some pieces we went to that place for deburring Ultem 30% glass-filled. The parts look great. +1 on using them. 

[dstryr]

I've been using them on some small 1x1x1 Peek medical parts. Holes down to .020 . .750 deep pocket with .040 corner radius. I do the best I can with the machine and send them off to them. Parts come perfect.

[JMahon]

Are these implants that y'all are sending to them? Our customer is saying only deburr with carbide hand tools!

[dstryr]

Are these implants that y'all are sending to them? Our customer is saying only deburr with carbide hand tools!

No. Mine are device parts....

[mx247]

Does anyone have any tips for deburring this stuff besides the cryogenic treatments? I have one hundred 5/16 dia. shafts 12" long with a boss machined on both ends and a slot milled down the length. I've done a few sample parts that I chamfered by hand with a HSS scraper and the customer still complained about "sharpness" on the edges. They updated their print to put a .005 radius on all edges but the extruded parts are out of round .010-.025 so using a chamfer tool to machine the edge is out of the question.

I need to ship these next week and was wondering if there are any type of abrasive wheels or brushes that might work on this material to create a softer blend on the corners.