1/2 to 1/4 router shank adapter

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Forum topic by tchara posted 06-07-2016 08:41 PM 869 views 0 times favorited 4 replies Add to Favorites Watch
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33 posts in 1547 days

06-07-2016 08:41 PM

Topic tags/keywords: question

I’m in the middle of installing a router table in the wing of my Delta 36-725. I have a brand new Sears router that came with a table and other router installed in it. The extra router I plan on using, I discovered is 1/2 shank. All my bits are 1/4 inch. Does anyone have any experience with any adapters out there that work, or should I start looking for sales on 1/2 router bits?

4 replies so far

View Lazyman's profile


5655 posts in 2191 days

#1 posted 06-07-2016 08:48 PM

Most routers these days that can handle 1/2 bits also come with a collet for both 1/2 & 1/4” shanks so hopefully, you’ll be able to find one for your router.

EDIT: Try to find the part number for your router. That might not be the cheapest price but might help you find the right one.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View bondogaposis's profile (online now)


5803 posts in 3155 days

#2 posted 06-07-2016 10:07 PM

Get a quarter inch collet for your router.

-- Bondo Gaposis

View HokieKen's profile


14502 posts in 1943 days

#3 posted 06-08-2016 03:20 PM

I’ve tried a 1/4” adapter that goes in the 1/2” collett and it worked pretty well but on heavy blind cuts, like dadoes, it seemed to let the bits climb a little bit. I now have 1/2” and 1/4” colletts for both of my routers. They were inexpensive and well worth the cost to eliminate the extra piece in the setup.

I now only buy 1/2” shank bits though. The extra “beef” makes for a better cut. So my advice is to get a 1/4” collett (not adapter but a seperate collett) and use the 1/4” bits you already have but buy 1/2” ones going forward.

If you can’t find a reasonably priced collet for your particular router, get a good quality adapter like this one.

-- Kenny, SW VA, Go Hokies!!!

View xeddog's profile


311 posts in 3811 days

#4 posted 06-08-2016 04:11 PM

I have had to use a 1/2” to 8mm adapter for use with my dovetail jig. The only problem I noticed was that I had to tighten the collet a lot more. The first time I used it, I was routing a 6” wide board for testing and then I noticed that things didn’t sound right. The router sounded like it was running without a bit. Guess what? I t was running without a bit.


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