Good morning,
I have a bunch of small diameter, but deep holes to drill in UHMW that are roughly 40 times D deep
They are 21ga (.159) blind holes 6.25in deep. The only drill I could find this long only has flutes the first 1.5in so i have to peck. Object moved
I also have a bunch of smaller diam holes down to 60ga. This part is like swiss cheese
Whats the best way to get at this without making the hole all full of little melty hairs? Print wants the holes to be completely free of little hairs etc
What I have been doing is peck drilling them at 3K rpm with .039" pecking depth (depth chosen by fusion) But it is kinda melty and stringy
My thought was to peck it slowly to give the bit/ material time to cool. Is this the right mindset?
Should i be spinning slower or taking deeper pecks etc?
I dont have through spindle coolant, so that isnt an option.
Thanks
I have a bunch of small diameter, but deep holes to drill in UHMW that are roughly 40 times D deep
They are 21ga (.159) blind holes 6.25in deep. The only drill I could find this long only has flutes the first 1.5in so i have to peck. Object moved
I also have a bunch of smaller diam holes down to 60ga. This part is like swiss cheese
Whats the best way to get at this without making the hole all full of little melty hairs? Print wants the holes to be completely free of little hairs etc
What I have been doing is peck drilling them at 3K rpm with .039" pecking depth (depth chosen by fusion) But it is kinda melty and stringy
My thought was to peck it slowly to give the bit/ material time to cool. Is this the right mindset?
Should i be spinning slower or taking deeper pecks etc?
I dont have through spindle coolant, so that isnt an option.
Thanks