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3rd February 2007, 01:30 AM #1
1/8" bits losing its edge too quick
Had a couple of these so far and it seems they go blunt pretty quick even on softer timber. I cut an F hole in a guitar top through maple and it was pretty much useless after that. It had a lot of gunge stuck to it. I got some of it off with meths. The second was in softer wood and I got two F holes but finishing the last was a strain.
The last one seemed to cut a bit better after I cleaned him up with meths.Both of em are carbides. Most of my bigger bits are carbitool or cmt and cut ok but they are pretty gunged up. I forgot where I got these lil fellas from I bought em quite a while back.
What is best to clean em up??
Am I using crap quality or is it par for the course for 1/8" bit to blunt out pretty quick??ray c
dunno what's more fun, buyin' the tools or usin' em'
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3rd February 2007, 01:48 AM #2GOLD MEMBER
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There are a couple of possibilities with your problem.
1) the glue & resin in the timber is melting as you cut & then gumming up the flutes in the cutter - the carbide is not blunt, it just can't reach the job thru' all the crud. You have started on the right track - use things like oven cleaner or paint stripper to soften the gunk, then a fine tipped blade (Exacto blade) or a needle in a pin vice to really get it out of the crevices.
2) the cutters are really not carbide, but HSS or even plain carbon steel & they are wearing out as well as gumming up with crud. Heating from friction caused by the crud will quickly wreck plain carbon steel bits. HSS will last longer. They still need de-crudding - they should last for more than one or two holes.
If these are 1/8 shank bits made for rotary tools like Dremel, there are a wide variety of bits made for these. In 'conventional' 2 flute router bits, the Dremel bits are HSS, as are most of the others. Rockler makes carbide 1/8 shank bits but they cost more than regular bits. Dremel and several others also make either solid carbide bits or 'structured' carbide rasps - unfortunately someone also makes HSS bits that look just like the solid carbide bits.
Take a look at Carbatec, Lee Valley, Rockler and MicroMark (http://www.micromark.com/)
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3rd February 2007, 02:38 PM #3
SBE 1/4" bits losin their edge
Actually they are 1/4" bits
it was late when i posted that msg near 2am
sorryray c
dunno what's more fun, buyin' the tools or usin' em'
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3rd February 2007, 02:42 PM #4
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