5/16" bits - Router Forums
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post #1 of 13 (permalink) Old 04-15-2018, 11:43 AM Thread Starter
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Default 5/16" bits

I have never used a router, but I have been reading and watching videos. Obviously, I was not watching all that I needed. Without going into all the details. I purchased a used router for $50 to practice with before purchasing a more expensive one. I bought a Shop Source that requires 5/16" bits. Can't find any to purchase. I don't want to sell it and stick another unsuspecting buyer. Is there any way I can get bits? Any suggestion are appreciated.

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Bob
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post #2 of 13 (permalink) Old 04-15-2018, 12:55 PM
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Hey, Bubbah; welcome!
You are talking about the shank of the bit, not the cutter diameter aren't you?
Why do you think it needs a 5/16" shank? (For you metric folk that's a 1/16" over 1/4" and 1/16" under 3/8".
It's not a metric size either.
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post #3 of 13 (permalink) Old 04-15-2018, 01:18 PM
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Hi Bob and welcome. I couldn't find it in a straight bit but I found it in a spiral. Other makes may have it. https://www.whitesiderouterbits.com/...roducts/ru3100 It can be hard to find collets that size but you can get bushings that fit into a standard 1/2" collet. Bushing Adapters - Lee Valley Tools As you see in the Lee Valley link, the 5/16 bushing is very close to the same size as an 8 mm shank router bit so an 8 mm bit is also an option.
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post #4 of 13 (permalink) Old 04-15-2018, 01:37 PM Thread Starter
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Thanks! On the router itself, it is printed 5/16" Electric Variable Drive Plunger Router. I purchased a 1/4" shank, 3/8" straight bit, and the collet will not tighten on it.

Bob
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post #5 of 13 (permalink) Old 04-15-2018, 04:04 PM
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Bob I'm suspecting that you may not be in North America. This is why we need members to fill out their personal profile because not being in NA makes a big difference in what we suggest to you. I'm guessing that that may be an 8mm collet which is common on European routers. I heard talk at one time that 1/4" shank bits were going to be gradually phased out here but it hasn't happened yet.

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post #6 of 13 (permalink) Old 04-16-2018, 09:36 AM Thread Starter
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Actually, I live in Eastern North Carolina... Thanks...
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post #7 of 13 (permalink) Old 04-16-2018, 10:04 AM
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Quote:
Originally Posted by Bubbah View Post
Actually, I live in Eastern North Carolina... Thanks...
What router and model did you purchase then out of curiosity?

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post #8 of 13 (permalink) Old 04-16-2018, 11:24 AM
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This is probably the router he has.
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post #9 of 13 (permalink) Old 04-17-2018, 12:42 AM
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In which case the collet is 8mm and not 5/16in. Cutter shank sizes in Europe are 6, 8, 10 and 12mm with 6, 8 an 12mm being the most common. in the UK the sizes are 1/4in (6.35mm), 8mm and 1/2in (12.7mm) as opposed to the American sizes of 1/4in (6.35mm), 3/8in (9.53mm - getting rare) and 1/2in (12.7mm). What's the betting that the router in question was supplied with UK or European size collets and that someone has "helpfully" translated 8mm to "5/16in" for the USA market?
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post #10 of 13 (permalink) Old 04-19-2018, 12:47 AM
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Originally Posted by Job and Knock View Post
In which case the collet is 8mm and not 5/16in. Cutter shank sizes in Europe are 6, 8, 10 and 12mm with 6, 8 an 12mm being the most common. in the UK the sizes are 1/4in (6.35mm), 8mm and 1/2in (12.7mm) as opposed to the American sizes of 1/4in (6.35mm), 3/8in (9.53mm - getting rare) and 1/2in (12.7mm). What's the betting that the router in question was supplied with UK or European size collets and that someone has "helpfully" translated 8mm to "5/16in" for the USA market?
I'll bet you are right. Amana makes an 8mm to 1/4" collet reducer adapter, on ebay for under 8 bucks. That is a really thin wall, .825mm. It looks thicker in the picture.

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