want to buy Advanced Engineering Plastic Temperatures Greater than 425f

chrisg9 · Jan 28, 2018

Hello,

So i am looking at making a small part for a Stratasys FDM 2000 mill but am having issues finding a reasonable way to buy the material i need. (200$ for a 1ft bar or 400$ for a plate)
Willing to buy scraps or drops of the following materials Torlon, Vespel, Celazole PBI, Fluorosint MT-01 (if you got a material i didnt mention but can withstand 425F and be machined please let me know)

the 2 parts i need to make are 0.75 diameter and 0.5in thick

if you have any round or plate that may just be sitting or going into a bin i would love to buy it off you.

i only need enough material to build a min of 2 but would like to build about 5

I am sorry if this is in the wrong section i did not see a material section.

DanielG · Jan 28, 2018

McMaster has a bunch of options. PEEK might be the cheapest option.

cyanidekid · Jan 28, 2018

might look into A.L. Hyde ultem 1000 polyetherimide. 970F flash ignition temp.

cool thing about that is its translucent, and very hard and machinable, two differences over "teflon"

JHOLLAND1 · Jan 28, 2018

have about 10 lb cylinder of teflon

chrisg9 · Jan 28, 2018

Im not sure if PEEK would be able to handle 5x cycles a day at 500F and hopefully last a few years.
The Vespel are stock and the machine lasted what i think to be the entire life and this machine is very old.
But i am not a material expert. if someone with more knowledge has any info i would love to use peek i can pick up what i need for 40$
I just dont want to do it then a year or so later be back in the same boat of this part failing,

chrisg9 · Jan 28, 2018

JHOLLAND1 said:
have about 10 lb cylinder of teflon

What would the dimensions of that be and rough cost?
your talking about PTFE right?
i am interested.

JHOLLAND1 · Jan 28, 2018

hollow cylinder/tube

12.5 in high wall thickness 0.97" id 2.75"
od 4.6"

I do not know chemical makeup I did apply 475 deg Centigrade solder iron with
minor indentation and no smoke surplus from us navy research lab

$100 plus actual shipping

chrisg9 · Jan 28, 2018

JHOLLAND1 said:
hollow cylinder/tube

12.5 in high wall thickness 0.97" id 2.75"
od 4.6"

I do not know chemical makeup I did apply 475 deg Centigrade solder iron with
minor indentation and no smoke surplus from us navy research lab

$100 plus actual shipping

sounds good as material strength but i cant use a tube. the part i need to make could be done from rod or sheet or plate.
I attached an image of the part in my opening post.

DanielG · Jan 28, 2018

chrisg9 said:
Im not sure if PEEK would be able to handle 5x cycles a day at 500F and hopefully last a few years.
The Vespel are stock and the machine lasted what i think to be the entire life and this machine is very old.
But i am not a material expert. if someone with more knowledge has any info i would love to use peek i can pick up what i need for 40$
I just dont want to do it then a year or so later be back in the same boat of this part failing,

I'd call the material manufacturer. Their application engineers should be able to answer that question.

TDegenhart · Jan 29, 2018

You might also look at Ryton PPS. U/L 946B 200/220C

http://www.craftechind.com/app/uploads/Ryton_R-4.pdf

Tom

CWC(4) · Jan 29, 2018

Would Delrin work?
A member posted some 2" x 1" round drops here:
http://www.practicalmachinist.com/v...ck-delrin-acetal-trepan-drops-1-thick-345220/
Seems like a good deal if size is something you can deal with.
CWC(4)

Dan from Oakland · Jan 29, 2018

Delrin definitely won't work. Heat deflection temp for unfilled PEEK is 320 deg f, so that wont work. 30% glass filled ot carbon filled is 600 deg f, so those would work. I may have a piece of Torlon- will check later. Dan

chrisg9 · Jan 29, 2018

CWC(4) said:
Would Delrin work?
A member posted some 2" x 1" round drops here:
http://www.practicalmachinist.com/v...ck-delrin-acetal-trepan-drops-1-thick-345220/
Seems like a good deal if size is something you can deal with.
CWC(4)

the temp on delrin is to low 350F but might take a look at that for another project
Found out the that the PTFE and PEEK would last only for a short time according t0 a material engineer and i will be pushing torlon but it should last a long enough.

Was able to pick up a 3/4in D 3in L rod of torlon for 50$

so if someone has any more tho i would like a few extra to make and give back to the people helping me rebuild the machine.

Also if any one has Vespel i would love to buy.

Milland · Jan 29, 2018

You might also look at using a machinable ceramic, McM has a number of choices in that class, all of them will be fine at the temperatures you're working in. Mechanically they'll be much more stable than any polymer, but could be fractured if too much load is put on them.

chrisg9 · Jan 29, 2018

i made a reply before but seems to not be here.

Any advice on working with torlon?

should i stick with carbide or ground HSS?

Well i got some torlon being delivered tomorrow. a local place called alro gave me a good deal.
But if someone has more torlon or any spare vespel i would still love to buy.
I want to make enough of these that any one with an old FDM 1600,2000 does not have to worry and the material i got is only enough to maybe make 6.

The ceramic sounds interesting but i have never used it and the whole must be baked after machining then the shrinkage is something that i have never dealt with.

Dan from Oakland · Jan 30, 2018

Very sharp (honed or lapped) carbide is best for finishing and sharp HSS drills will work ok- just don't go nuts on speed. You can rough turn it with a positive rake insert.

I have about 18" of 1" dia Torlon 4203. If you are interested, send me a PM or e-mail at dmcgearsATyahooDOTcom.

Dan

Milland · Jan 31, 2018

chrisg9 said:
The ceramic sounds interesting but i have never used it and the whole must be baked after machining then the shrinkage is something that i have never dealt with.

The ceramics I'm referring to are not fired after machining, but are ready to cut/use: McMaster-Carr They have different mechanical properties, the stronger ones tend to be more expensive, but the parts you're describing are reasonably small and will certainly cost less than Vespel (which I've used also). Some are harder/more abrasive than others, you can usually drill with HHS, but I prefer to use cobalt or carbide as much as possible.

I have worked with "green" (unfired) Al2O3 alumina preforms, the shrink factor was roughly 20% IIRC.

chrisg9 · Jan 31, 2018

Dan from Oakland said:
Very sharp (honed or lapped) carbide is best for finishing and sharp HSS drills will work ok- just don't go nuts on speed. You can rough turn it with a positive rake insert.

I have about 18" of 1" dia Torlon 4203. If you are interested, send me a PM or e-mail at dmcgearsATyahooDOTcom.

Dan

Pm sent very interested in these.
Also if you have any stock of around 1/4 i could use some of that to for a part that just broke.......

jim rozen · Jan 31, 2018

Milland said:
The ceramics I'm referring to are not fired after machining, but are ready to cut/use: McMaster-Carr They have different mechanical properties, the stronger ones tend to be more expensive, but the parts you're describing are reasonably small and will certainly cost less than Vespel (which I've used also). Some are harder/more abrasive than others, you can usually drill with HHS, but I prefer to use cobalt or carbide as much as possible.

I have worked with "green" (unfired) Al2O3 alumina preforms, the shrink factor was roughly 20% IIRC.

Machinable ceramic often called "Macor" and can easily be cut with water as the cutting fluid.

Macor - Wikipedia

Dan from Oakland · Feb 1, 2018

chrisg9- you have a PM from me.
Dan

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