drill bits

[dgarza]

soooo you are saying I do need one slower than 10000? or no?

[Delta Kits]

10,000 should be fine. I would recommend using speeds between 5,000 RPM's and 14,000 RPM's.

[glassdoctor]

I have used lower rpms, but 90% now I use the 10K speed. I don't like to go any higher though. Lower is better for the bits, but I still get dozens of uses at 10K. Just keep away form old buggers and PVB as said above.

Back in the day, before cordless dremels were used, some I used a plain cordless Makita.... maybe 1000 rpm? It worked, just not as fast... or convenient.

[GlassStarz]

I would have to dissagree on this one the 10000 rpms is way to fast and unless you have a good piece of glass already missing sometimes the bit jumps around a little before getting a bite leaving a scratch around the hole 5000 rpms is the only way I would go ever. just my opinion

[glassdoctor]

Oh yeah!! Well,....

He he, just a sec... I need to go check my dremel and wizard.....

[dgarza]

yeah glasstars my first try jumped out of the hole and left a dotted sratch on my windshield around the chip! I have gotten better about it though making sure Im steady with the drill.

[GlassStarz]

Dgarza
The other thing that will happen is if your using the drill bits with the little lump on the end (shaft smaller than drill portion) the little knob will sometimes break off in the windshield at high speeds. never had it happen at 5000rpm

[glassdoctor]

As a general rule, never begin drilling at 90*. Always scuff the glass with he drill laying down @45* to create a "pilot" hole of sorts, so the bit won't skip as you continue to drill.

Hmmm, maybe you could just use a good center punch to mark the spot.

Anyway, I never associated rpm with the bit skipping, but I know what you are saying. Lower rpms is less "violent".

I think the dremel minimite overrates the speeds... it's listed as 5K/10K I think? The low speed seems like it just can't possibly be 5K even w/out a load... maybe 3-4K. The "high" speed probably actually runs about 5000 when drilling, cause the motor is a wimp...

[Delta Kits]

As a general rule, never begin drilling at 90*. Always scuff the glass with he drill laying down @45* to create a "pilot" hole of sorts, so the bit won't skip as you continue to drill.

Exactly.

If I had known it was that easy to explain, I would have just said it!

If you use that technique, there is no problem with drill speeds up to 14,000 RPM's.

As far as the MiniMite, the current speed ratings are 6500RPM & 13,000RPM. We haven't tested them to see whether those speed ratings are accurate.

[dgarza]

oh yeah that sounds great ill try that. thanks.