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5/16" collet

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Forum topic by D_Allen posted 11-25-2010 03:19 AM 965 views 0 times favorited 6 replies Add to Favorites Watch
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D_Allen

495 posts in 2244 days


11-25-2010 03:19 AM

I just got an email from Woodworker’s supply that had a sale on a Trend T4 plunge router. It states that it comes with 1/4 and 5/16” collets.
What would you need a 5/16” for?

-- Website is finally up and running....www.woodandwrite.com


6 replies so far

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wseand

2754 posts in 2502 days


#1 posted 11-25-2010 03:30 AM

I am not sure maybe they are making a mid sized collet for more strength for the mid sized bits. Or a typo. Would be interested to find out.

-- Bill - "Freedom flies in your heart like an Eagle" Audie Murphy

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D_Allen

495 posts in 2244 days


#2 posted 11-25-2010 03:53 AM

Well, I guess I should have researched this more.
Apparently there are some router bits with 8mm shanks which is close enough to the english 5/16”.
I didn’t know!

-- Website is finally up and running....www.woodandwrite.com

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wseand

2754 posts in 2502 days


#3 posted 11-25-2010 04:02 AM

Yeah I looked it up a little more afterwards and figured that was it. One of these days we will catch up with the rest of the world.

-- Bill - "Freedom flies in your heart like an Eagle" Audie Murphy

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jusfine

2405 posts in 2386 days


#4 posted 11-25-2010 04:59 AM

There are a number of 8mm collets out there, I wouldn’t use a 5/16” for those bits when the right ones are available.

-- Randy "You are judged as much by the questions you ask as the answers you give..."

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Dan Lyke

1510 posts in 3585 days


#5 posted 11-29-2010 09:06 PM

Yep. Europe and Canada use 8mm bits. The bits that came with my Leigh Super dovetail jig are 8mm shank (and come with a ½” to 8mm adapter sleeve), and my Festool OF 1010 router has collets for ¼” and 8mm shank bits.

-- Dan Lyke, Petaluma California, http://www.flutterby.net/User:DanLyke

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Bob #2

3809 posts in 3481 days


#6 posted 11-29-2010 09:45 PM

I wonder if 5/16” is a rough translation of 8mm for the U.S. market that generally knows nothing about the decimal system?
5/16” = 7.938 mm
The main reason I switched to 8mm bits on my Leigh jig was to get a better grip on the narrower shafts. I found that 1/4” bits slip in my chucks no matter how tight they are.
I have had no problem with 8mm shafts in that respect so far.

-- A mind, like a home, is furnished by its owner

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