Deburring of Torlon 4203 After Machining

I've heard of using a ScotchBrite pad to knock the burrs off. What kind of tolerances are you trying to hold? Can you tumble?

Please describe the part you are machining. What process is creating the burrs? are we talking about big burrs?

Especially in the milling of tough plastics you must use NEW top quality cutters that have never been used to cut metal, not even aluminum. You should direct your tool paths so that the cutter ( as much as possible ) pushes toward the material rather than away from the material to reduce the creation of burrs as much as possible. It is also advisable to program a radius cutter or chamfer cutter to do as much deburring as possible in the machine. You may also need to cut some surfaces a second time after an adjacent surfaces has been cut in order to remove the burrs. Almost anything is better than deburring by hand. Once these things are accomplished and you still have some burrs, a new X-acto knife is best for hand deburring. This is an acquired skill which usually needs to be done with very good lighting and probably magnification.

Yet another remarkably good answer!

we are fabricating contactors for electrical testing of IC for semiconductors. Using pogo pins with 0.27mm diameter, we need to drill 0.3mm to insert the pogo pins and any amount of burrs will surely lock the movement of pogo pins.

Get a 3/16 dia x 90 deg spot drill. Spot your holes .060-.070" deep. This should eleminate burrs at the top of the hole. If the material is so stringy that you still have burrs, or you are drilling through and have burrs on that side of the part then get a 3/16 or 1/4 dia carbide spherical burr. Do not use the burr in a grinder bur hold it in a pin vise or a small chuck and turn it by hand. Again, make sure your drill is brand new and don't run it more than 2800rpm or you are likely to create burrs just by melting the material. Your feed rate should create a chip load of about .002". If you are drilling in a drill press controlled by hand, you can measure the chip to get an idea if you are feeding too fast or too slow. Hope this helps.

Gary

Hi,

with this small holes I would not try to deburr but either

A:melt down by a switched heatsource that is switched on only for a time to let he burrs be liquefied and shrunk by capillary action to a small rim around the hole, or

B: take a solvent (we used NMP = n-methyl-pyrrolidone for getting a solution of unfilled Torlon) in a spray or short dip and then wait for some time and then dry.

The NMP has a high boiling temperature so drying is to be done at elevated temperature. And: look for toxicity, not too bad but not recommended to inhale!

RHABE