Get a different supplier. If you need suggestions let me know.
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Mitsubishi Chemical Advanced Materials
www.mcam.com
Use a thermal pad or gap pad. https://www.henkel-adhesives.com/us/en/products/thermal-management-materials.html
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Mitsubishi Chemical Advanced Materials
www.mcam.com
Have you considered a low friction liner?
https://www.mcam.com/na-en/products/equipment-for-heat-wear-corrosive-applications/tivarr-low-friction-linings/?r=1
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Mitsubishi Chemical Advanced Materials
www.mcam.com
Not sure the gear loading but perhaps cast nylon with MoS2 filler (Nylatron GSM) could replace the larger metal gear. Might need a metal hub still depending on the shaft loading.
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Mitsubishi Chemical Advanced Materials
www.mcam.com
What is the IPA purity. Perhaps a residue to forming. If you water rinse and vacuum bake at 100C do you get lower friction. I would suggest careful measurement of your fits would help to resolve some of these possibilities.
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Mitsubishi Chemical Advanced...
What temp are these plates exposed to? You could used a solid film lubricant filled polymer sheet/plate. Ketron HPV is a good material. You can go to plasma coatings (SiC or TiN) if you need temps over 500F. I believe Ti can be Ion Nitrided but isn't possible via liquid salt bath due to...
You can use a glass or ceramic reinforced UHMW with low CTE. Tivar 88 or Tivar Ceram-P
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Mitsubishi Chemical Advanced Materials
www.mcam.com
Using abradable polymer seals will lower consumption. Fluorosint 500 or Duratron PAI are commonly used.
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Mitsubishi Chemical Advanced Materials
www.mcam.com
We make long life abradable seals for compressors. Fluorosint 500 or Duratron PAI are used depending on temperature, chemistry, and loading.
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Mitsubishi Chemical Advanced Materials
www.mcam.com
Cnc vacuum table with knife or rotary blade. We used Gerber 12 ft x 80ft unit. We also used steel rule die with hydraulic rotary punches.
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Mitsubishi Chemical Advanced Materials
www.mcam.com
You need to determine the operating PV to see if Delrin (POM-H) can handle this application. Then you need to determine total running clearance. See link below for design guide. Since your bushing is small I’d step up to a better material like Techtron HPV. Won’t be much more $$ and will last...
Or you could just buy the laminate and cut it to size. Here is one. http://www.matweb.com/search/datasheet.aspx?matguid=137f96e53ec6473caba99f5f57a0bf04&ckck=1
I look at AMS 2759/3 for guidance. I’ve personally aged 17-4PH in air. 1025F for 4 hrs. If you don’t like heat tint they wrap it in 321 SS foil. If this is a production part then send it out for HT.
There are many options with polymers. Unfilled PTFE has issues with creep. There are reinforced grades like Flourosint and Solid filled Lubricant or Oil Filled Cast Nylon. Other options are high pressure velocity grades of PPS, PET, PAI, or PEEK. If the stresses are too high (not enough area)...
Those are some good points. Single Crystal Ceramics sound like a much better fit. If you have issues with your Vespel consider a PBI grade like CU-60. The surface finish tends to improve with wear which may have added benefits. Good luck!
