Store Locator
$8.99 Each
In stock

Get Expert Advice

Return Policy

1/4'' to 1/8'' Collet Reducer

Allows you to use 1/8'' shank bits in your 1/4'' collet router.
Item #
90% of 100

This collet reducer lets you use a wide array of 1/8'' shank router bits and cutters in any router with a standard 1/4'' collet. An 1/8'' shank is a common size on specialty ''miniature'' router bit sets, so this is the perfect accessory for highly detailed work. The compression slot provides a tight grip on the bit/cutter.

(1) 1/4'' to 1/8'' Collet Reducer
More Information
Weight 0.0300
Tech Spec
  • Reduces standard 1/4'' router collet to 1/8''
4.5 / 5.0
35 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Works great. Use it with my palm router in my cnc machine.
November 14, 2019
2 months ago
Woodworking Experience:
Worked perfectly
October 1, 2019
4 months ago
Does what it's supposed to do.
Probably the best option out there. Rather than replacing the entire collet this adapter slides in to the existing collet, which in my opinion adds strength. Used for my Shapeoko XXL and Makita Router.
September 20, 2019
4 months ago
Woodworking Experience:
Awesome piece. Highly recommended it
September 10, 2019
5 months ago
Woodworking Experience:
Quality product at the right price.
September 8, 2019
5 months ago
Woodworking Experience:
Great item, works well
Works great. Was just what I was looking for.
July 19, 2019
6 months ago
Woodworking Experience:
Friend of The Carpenter
Works as expected, runout is acceptable. A little pricy, but what isn't?
March 18, 2019
10 months ago
Woodworking Experience:
Just what I needed!
Wellmade and just what I needed!
February 22, 2019
11 months ago
I am satisfied.
The product works as it was designed to work.
February 3, 2019
1 year ago
Woodworking Experience:
All is well
December 5, 2018
1 year ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 4 questions Browse 4 questions and 15 answers
Why did you choose this?
Rockler Store
Great quality product and I was refereed to this by a friend who uses it quite a bit.
Darin S on Jan 10, 2020
I choose because it is the exact accessory that I need to use smaller bits for my router.
Bert C on Dec 30, 2019
Great quality product and I was refereed to this by a friend who uses it quite a bit.
Darin S on Jan 10, 2020
Needed finer bit selection
Gerald S on Jan 1, 2020
I choose because it is the exact accessory that I need to use smaller bits for my router.
Bert C on Dec 30, 2019
So I can use my pin router to route inlay cavities into guitar fingerboards using the 1/8 shank carbide spiral bits.
Lou M on Oct 23, 2019
Recommended by others to address issues with 1/8" bits breaking in a DeWalt 611 mounted in an XCarve CNC. The price was low enough that it was worth it to at least see if it would resolve my issue.
Delbert B on Apr 26, 2019
I needed it
Tim M on Mar 18, 2019
Allows me to use small jigs for building 80% ar lowers.
Thomas E on Mar 6, 2019
This will allow me to use small detail bits in my router
David on Mar 2, 2019
To be able to use extra small router bits on detailed signs.
James B on Feb 20, 2019
need for my dewalt router
Lee T on Feb 15, 2019
For my bits to use on my CNC and it fits the DeWalt DWP611
Wade on Feb 5, 2019
For cnc router on millright , router is an EnerTwist 1 1/4hp router .Hope it works????
Jerald N on Jan 14, 2019
Hoping it works for my 1/4" collet for my DeWalt DWP 611
Kirk Z on Jan 5, 2019
need it for shark cnc for
Vicky D on Jan 2, 2019
Needed for DW611 router in CNC machine.
FRANK S on Sep 26, 2018
These allow me to use very fine bits in my CNC router. These are very hard to find locally and when you need them, you need them. Thanks Rockler for stocking these.
Paul M on Aug 9, 2018
Because my tool only came with a 1/4" and my bit was 1/8"
Brian C on Jul 5, 2018
CNC machine a 1/32 groove .375 deep.<br />using a BOSCH router.<br />The Bushing appears Ground in the photo...that's what I'm hoping for.<br />Cannot have runout --
Rusty S on Jul 1, 2018
I chose this Collet Reduced because it is exactly<br />the tooling I needed.
Robert S on Jun 20, 2018
adapt bits for my Pirahna CNC
RUSS H on May 23, 2018
Gerald F on May 2, 2018
Robert T on Apr 22, 2018
Needed it for CNC
George F on Apr 19, 2018
needed it
Terry T on Apr 18, 2018
To use 1/8 bits in router
thomas g on Apr 17, 2018
recommended by your chat service
John R. Duncan, J on Apr 9, 2018
Need to be able to run 1/8" bits in 1/4" router.
Stuart H on Apr 2, 2018
to run 1/8" router bits in my 1/4" collet on my cnc router
Eric M on Mar 23, 2018
To use smaller diameter bits for closer inside corner diameters
Rick W on Feb 9, 2018
found it on the wed, was looking for one
Carl T on Feb 6, 2018
Would like to do router inlay with a 1/16" Dremel bit, but still need to use my router with template bushings. The problem is there are no template bushings for Dremel that allow smalller detail work.
Ed S on Sep 10, 2017
for using specialty 1/8 shank router bits
Paul A on Jul 1, 2017
fit small bits
Gary R on Mar 11, 2017
bought a 1/8" carving bit for my router and wasn't paying attention to the bit size while ordering. this will allow my to place the bit into a 1/4" collet.
Robert F on Mar 5, 2017
This reducer enables a 1/8" tile cutter bit to be used with the DeWalt plunge router.
Len G on Jan 3, 2017
for trim router didn't have one. :)
cory a on Dec 26, 2016
Lydia T on Nov 26, 2016
I needed the reducer to fit 1/8 inch shank bits I have
Allyn B on Nov 18, 2016
Only quality adapter I found on line.
Tom T on Nov 10, 2016
CNC machine. Router is 1/4", smaller bits are 1/8"
Gerardo H on Oct 26, 2016
I have some bits that are 1/8 shafts and have been wrapping tape around bits.
Kenneth on Oct 15, 2016
I like to set up 2 routers when doing dovetails so I don't have to re-set depth
Albert F on Aug 22, 2016
I built a CNC router kit in 2011-12 and now I want to try some 1/8 inch end mills. Rockler was the only place on the web where I have found the necessary part to make this happen. Thanks, folks!
COLIN K on May 29, 2016
Because I could not find a 1/8 collet for a Porter Cable Router
Gerald H on May 11, 2016
To use router to use Dremel cutters
William R on Apr 14, 2016
so i can use chainsaw sharpening stones in my die grinder
don m on Apr 2, 2016
I made a CNC machine that utilizes a Dewalt DWP 611 as a spindle - and it is made for 1/4" bits but I lose details in carvings and sometimes 1/4" radius is not suitable
Paul B on Apr 1, 2016
I often need to work with RotoZip and/or Dremel bits in a more stable tool. I am hoping that this will help.
Jack M on Mar 9, 2016
Using a Porter Cable router on my CNC Shark and the router does not offer a 1/8" collet
Corey B on Feb 8, 2016
To save time changing out collets.
James M on Dec 21, 2015
Needed finer bit selection
Gerald S on Jan 1, 2020
So I can use my pin router to route inlay cavities into guitar fingerboards using the 1/8 shank carbide spiral bits.
Lou M on Oct 23, 2019
Will this work for a Dewalt DWP-611 router ?
David P on Jul 20, 2015
BEST ANSWER: Yes. Any router with a 1/4" collet should be able to use this.
Will this work with the dewalt dw618?
Sean S on Aug 8, 2019
BEST ANSWER: We have a Dewalt dwp611 with a 1/4" collet and it works great to hold the 1/8" bits.
Is it safe to put in a cnc with a 3hp motor?
Phaines on Jan 6, 2019
BEST ANSWER: Yes. I used it to retain a 1/8 dia pin router in a standard router for overhead
shallow work in aluminum, plastic and brass.
i have this 30 year old black and decker (not labeled DeWalt) 1/4 inch router with a nut to tighten the collet. The factory collet is shaped almost like a diamond and its only about 1/4 inch long.
Is this reducer tapered to supply the squeezing pressure to hold the bit ? I ask because it looks pretty long and also looks straight.
William V on Apr 13, 2017
BEST ANSWER: There is no taper on the reducer, the bit is held by the squeezing pressure supplied by the collet. So you would need a 1" deep, 1/4" round collet for your reducer, otherwise the runout will become a problem. Your best bet would be to buy the right collet for your router.
Prop 65 WarningWARNING: Cancer & Reproductive Harm -

Prop 65 WarningWARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to