How to reduce the distortion of Delrin machined parts during processing?

POM/ Delrin. Thermoplastic crystalline polymer,it is known as 'super steel',with high mechanical strength and rigidity,strong impact resistance,used for widely temperature range (-40℃~120℃).

At present,the Delrin as lower cost of plastic,It is replacing some of the markets that have traditionally been dominated by metals.For examples,alternative zinc alloy, brass, aluminum and steel parts.Has been widely used in electronic electrical, mechanical, instrument,daily light industry, automobile, building materials, agriculture and other fields.

But it's not easy to process.The delrin machined parts is easy to deform during processing. SYM precision team always machining the delrin machined parts slowly,and comply below steps.

1. Annealing the raw material first.

2. Cutting standard material with more machining allowance (10mm~20mm).

3. Try to process more steps,take a long time (12~ 24hours)to let the delrin part cool down during every steps.

4. use as little force as possible to hold it during machining,or use glue instead of clamps to fix the product during process.

5. Use high speed steel tool instead alloy steel tool,because the high speed steel tool is very sharp,the heat produced is small during the cutting process.

6. Keep small cutting output during the process.


Even we did all above,there still exist small distortion for Delrin machined parts for its character,so if the dimensions within 0.05mm(0.002") tolerance of your machined parts,please consider other material,Aluminium Alloy or Steel.