I've been playing with tapping plastics like HDPE and so forth and not surpisingly discovered that sharp taps and drill bits and not taking small cuts seems to help.
So the question is how does one source "sharp" taps in the 6-32 to 3/8" sizes? Is there a certain brand or type that cuts plastic out of the box better? Internet wisdom seems to show that looser taps like H5 are better as well as they make up for the plastic shrinking back into shape.
Any other tips?
I have a 70-year-old box of slips, which I use when I can, but I still find a need for pieces of wet/dry wrapped around a nail or dowel. I haven't sharpened a tap for decades but that's how I used to sharpen them.
That's the same thing I do for many steps in building fishing rods. I usually cut a narrow strip and wrap it around in a spiral, using glue to hold it in place. It's handier than digging out slips that have different radii on opposite edges.
But then most don't know how to tap or cut threads with a die. I have seen so many just crank away. Then complain.
With plastic you do it under water. Edge pressure melts plastic. With water and working slow the tap / thread is cut without problem. Lube and cooling.
Mart> >> I've been playing with tapping plastics like HDPE and so forth and not
Have something to add? Share your thoughts — no account required.
Ask the community — no account required