GGGGRRRRR

GGGGRRRRR

Postby Ms Wolffie » Sun May 03, 2015 1:34 am

I have to cut quite a few 0.25" holes in a 5mm checkerplate.
I am using a Kress router with a 0.25" ER collet.
Bought a new 1/4" drill bit for the job.
After the third hole the bit pulled out of the collet as the router was lifting out of the hole.
Of course the bit didn't get pulled completely out of the collet and as the machine was travelling to the next hole, the bit was spinning at 45 degrees along the plate.
Before I got to the emergency stop, both the bit and the collet were smoking hot.
The collet survived but the bit is blue top and bottom and, I presume, useless.
Of course it had to happen on a Saturday afternoon when the shops are closed.
I measured the shank and instead of being 0.25" it is 0.23 :evil:
Apparently that is enough to allow the bit to slip in the collet.
Next time I will measure the shank to make sure it fits the collet but, since they are enclosed in a bubble pack, I could be buying several before I found a correct one.
Oh the joys of living in the bush NOT
Cheers
Wolffie

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Re: GGGGRRRRR

Postby Dclifton2 » Sun May 03, 2015 2:49 am

Most bits are under size, I don't think you will find a 1/4 bit that's .25
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Re: GGGGRRRRR

Postby 4DThinker » Sun May 03, 2015 4:42 am

Onsrud bits are the ones we buy that are the dimensions they claim 99% of the time.
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Re: GGGGRRRRR

Postby Ms Wolffie » Sun May 03, 2015 7:19 am

4DThinker wrote:Onsrud bits are the ones we buy that are the dimensions they claim 99% of the time.

If only they were here, shipping from the US is more than the cost of the bit :cry:
Cheers
Wolffie

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Re: GGGGRRRRR

Postby scottp55 » Sun May 03, 2015 12:38 pm

Hate to mention it Wolffie, But if collet got that hot and then was spinning AND side pressure was on it...you may have smoked the collet as well :cry:
I'd check it REALLY close.
Only good news is it's not a $$$$spindle:(
Sorry,
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