Have you tried this style of adjustable reamer in polyethylene?

Adjustable reamers can be preset to any size, thus allowing for any amount
of spring back. You can start by adjusting it to slightly polish a drilled
hole, and just keep adjusting it out, and making additional passes unitl you
get what you want.

If he is trying to hold .002" oversize, an oversized drill is going to be
much less predictable, probably more difficult to find and a good bit more
expensive.

I'll be the first to admit, I don't recall ever using one in polyethylene -
but I have used them with good results in delrin.


"Cy Galley" wrote in message
news:ArVsh.1152041$084.63830@attbi_s22...
Reamers as another said just don't work on these self-lubing plastics. It
just pushes away and then springs back. Sharp over size drills some times
work.



"Maxwell" wrote in message
...

"DonMorrisey" wrote in message
oups.com...
I'm trying to figure out how and where to buy reamers. I need to
create some 5/8" and 1/2" holes in ultra high molecular weight
polyethylene blocks for my control system. The aileron push tubes
slide thorugh the blocks and the aileron actuators mount in the blocks
as well. The mounting component of my aileron actuator is 5/8", so
when buying the .6250" reamer is that already slightly oversized? I
have been told the holes should be oversized by .002". I have looked
for reamers on line but don't know if what I'm buying is the right
size, there is little or no description for them.

Can someone tell me what I should look for in buying these tools and
where may be the best place to do so?

Thanks. Don


You might want to consider adjustable reamers Don.

http://wttool.resultspage.com/search...eamers&x=0&y=0

If the long link won't work, just go to http://www.wttool.com/ and do a
search on adjustable reamers.