I was looking to make a few drill bits, basically a spade bit ground down, and wondered if there were common sizes to use and if any templates online?
If not, I went to school for design, so, was going to use Illustrator to make a PDF of the common sizes/shapes. That way people could print it out, cut the shape out, glue to a spade bit and grind down to the paper, that way it's a bit easier to get the shape right and sides even.
Not sure if that would be a useful resource for people on here or not...?
This site shows 3 shapes... well first 2 are basically the same I guess. Just wondered if there was a way to determine the curve properly since they aren't perfectly round.
Size wise, pipemakers.org sells spoon bits, bit too pricey for my budget which is why I'm grinding my own, and seems 11/16", 3/4", 13/16" and 7/8" are what they have. Pimo has the spade bits 3/4", 7/8" and 1".
Measuring my Castleford reamers with a micrometer, not really getting the same results. .635", .713", .8" and .867" (which I guess is about 5/8, 3/4, 13/16, and 7/8... but off by a bit).
Would these be considered 'standard' sizes? using what pipemaker.org has seems the way to go.
My goal is to maybe make a few pipes for myself, as well, use the bits in estate pipes that are in really bad shape. I have a couple where the reaming just mangled the inside of the bowl... only way I can see fixing would be to go up a step and trim the top down. Plus again, if having a pdf on here helps people I'd post it for use as well.
If not, I went to school for design, so, was going to use Illustrator to make a PDF of the common sizes/shapes. That way people could print it out, cut the shape out, glue to a spade bit and grind down to the paper, that way it's a bit easier to get the shape right and sides even.
Not sure if that would be a useful resource for people on here or not...?
This site shows 3 shapes... well first 2 are basically the same I guess. Just wondered if there was a way to determine the curve properly since they aren't perfectly round.
Size wise, pipemakers.org sells spoon bits, bit too pricey for my budget which is why I'm grinding my own, and seems 11/16", 3/4", 13/16" and 7/8" are what they have. Pimo has the spade bits 3/4", 7/8" and 1".
Measuring my Castleford reamers with a micrometer, not really getting the same results. .635", .713", .8" and .867" (which I guess is about 5/8, 3/4, 13/16, and 7/8... but off by a bit).
Would these be considered 'standard' sizes? using what pipemaker.org has seems the way to go.
My goal is to maybe make a few pipes for myself, as well, use the bits in estate pipes that are in really bad shape. I have a couple where the reaming just mangled the inside of the bowl... only way I can see fixing would be to go up a step and trim the top down. Plus again, if having a pdf on here helps people I'd post it for use as well.
