PreciseBits DeWalt DNP-611 1/8" collets are in stock

Brian Stone
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PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by Brian Stone » Fri Jan 30, 2015 7:03 pm

The full kits including 1/8", 3/16", and 1/4" collets for the DeWalt 611 (also Porter-Cable 450 compatible) are now available on their website. Individual collets are available, too for $24 each.

Link here:
www.PreciseBits.com
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CastIrony
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by CastIrony » Fri Jan 30, 2015 7:27 pm

Figures, the day after my 1/8" Elaire collet shipped :D

Might still upgrade in a while, the PB collets look awesome.
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by WillAdams » Fri Jan 30, 2015 7:44 pm

Has anyone written up a bit about the ER-style collets and their conveniences? Or found such a writeup which they would suggest?
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Hans
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by Hans » Fri Jan 30, 2015 8:55 pm

I don't think there's a lot to say about them, is there? You can buy them with better runout than the stock collets, for any tool diameter you want.
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Brian Stone
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by Brian Stone » Sat Jan 31, 2015 12:45 am

Here's a rundown of what I've read on other forums. Not sure how accurate this is, though.

- Wider range of fit. Fewer collet changes required for a wider range of shanks.
- Stronger holding power vs. standard collets due to ER having 6 gripping surfaces.
- Better high-frequency damping from the spindle.
- Lower concentricity error (results in reduced vibration, I guess).

Other than that, they're sort of the "standard" collet for precision milling. I think the actual magnitude of these advantages is insignificant for hobby projects, though. I've been milling pretty accurate parts with the standard collet on my DNP611. I'd be glad to post some comparison numbers when I get the kit from PB next week.
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CastIrony
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by CastIrony » Sat Jan 31, 2015 1:02 am

Has anyone measured the runout of the 611 shaft itself? Is it likely to be low enough to get a benefit from the Ultra-Precision and Extreme-Precision versions?
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by rtlflatt » Sat Jan 31, 2015 1:06 am

CastIrony wrote:Figures, the day after my 1/8" Elaire collet shipped :D

Might still upgrade in a while, the PB collets look awesome.
Same here got elaire 1/8 collet 3 days ago as well as precise bits 1/4. At least I only had bad timing on collet as opposed to buying shapeoko 2 a day before shapeoko 3 was announced. May end up getting it anyways and compare the two. Got .0001" dial test indicator already
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Brian Stone
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by Brian Stone » Mon Feb 16, 2015 8:08 am

Well, I was going to post some numbers this weekend, but my indicator is broke... bummer. I don't really feel like buying another one until I need to mill some really tiny parts, which I probably won't get to until at least May. I suppose I could do a test in aluminum with the standard collet and then do the identical test with the PreciseBits collet and compare the results. Maybe I'll do that next week.
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twforeman
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by twforeman » Mon Feb 16, 2015 4:42 pm

CastIrony wrote:Has anyone measured the runout of the 611 shaft itself? Is it likely to be low enough to get a benefit from the Ultra-Precision and Extreme-Precision versions?
I bought the Precise Bits collet set for my 611. I had .004" indicated runout using the stock collet and .002" runout using the Precise Bits collet.

I'm not sure the improvement in runout is enough to justify the cost of the ER collets, but the ease of use probably is. :)
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TomDChi
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Re: PreciseBits DeWalt DNP-611 1/8" collets are in stock

Post by TomDChi » Sun May 03, 2015 2:06 am

Brian Stone wrote:Here's a rundown of what I've read on other forums. Not sure how accurate this is, though.

- Wider range of fit. Fewer collet changes required for a wider range of shanks.
- Stronger holding power vs. standard collets due to ER having 6 gripping surfaces.
- Better high-frequency damping from the spindle.
- Lower concentricity error (results in reduced vibration, I guess).

Other than that, they're sort of the "standard" collet for precision milling. I think the actual magnitude of these advantages is insignificant for hobby projects, though. I've been milling pretty accurate parts with the standard collet on my DNP611. I'd be glad to post some comparison numbers when I get the kit from PB next week.
Do the PB collets work well with for instance a 6mm mill in a 1/4 inch (6.35mm) collet?

I notice that PB doesn't offer metric collets (at least for the models I've looked at), compared with Elaire. Is this an indication that the close metric size mills work well with the next size larger US unit model?

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