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Up-spiral design directs chips up and out of mortises and grooves, resulting in a cooler cutter, less burning and a long cutting life.
Grouped product items
Product Name Price Qty
1/2" D x 1-1/4" H x 1/2" Shank Onsrud HSS Up-Cut Spiral Mortising Bit
1/2" D x 1-1/4" H x 1/2" Shank Onsrud HSS Up-Cut Spiral Mortising Bit Item #: 63008
In stock
$32.99
Each
  • Buy 3 for $26.99 each and save 18%
3/8" D x 1" H x 1/2" Shank Onsrud HSS Up-Cut Spiral Mortising Bit
3/8" D x 1" H x 1/2" Shank Onsrud HSS Up-Cut Spiral Mortising Bit Item #: 38238
Oversold Until 09/26/2019
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$32.99
Each
  • Buy 3 for $21.59 each and save 35%
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Onsrud Up-Cut Spiral Mortising HSS Router Bits - 1/2" Shank

Item #
GRP40130
Rating:
96% of 100
22  Reviews
Onsrud up-cut spiral router bits are perfect for cutting mortises. The up-cut design helps keep the mortise clear of chips and shavings while you cut.
(1) Up-Spiral Mortising Bit
More Information
Weight 0.2200
Technical Documents
Bit Type Spiral
Shank Size 1/2"
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4.8 / 5.0
22 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
19
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BOX JOINTS
WORKS GREAT ON BOX JOINTS
April 1, 2019
Purchased
 1 year ago
Woodworking Experience:
Advanced
Crisp with zero tear out
I used this bit to cut 40-1 1/4 x 1 1/4 x 1/2” mortises in Red Oak. Last one was as crisp as the first. Flat bottom and no tear out.
February 25, 2019
Purchased
 7 months ago
Woodworking Experience:
Advanced
worked great
it hogged out a garbage bag of wood to inset clock innards and I mean a big bag no troubles
June 21, 2018
Purchased
 1 year ago
Works great
June 17, 2018
Purchased
 1 year ago
Work great; much better than a straight cutter.
Very good.
June 13, 2018
Purchased
 over 2 years ago
Woodworking Experience:
Advanced
new project
Had to have a special size bit for the new finger joint fixture I made.
March 8, 2018
Purchased
 over 4 years ago
Woodworking Experience:
Advanced
Quality work
I wish I bought this tool years ago. Desk drawers made with box joints look great and using this bit made it easy.
September 11, 2017
Purchased
 over 2 years ago
Great mortising bit
Great bit for making mortises. Cut cleanly with no burning. Would definitely recommend for mortise and loose tenon joinery
July 4, 2017
Purchased
 over 2 years ago
Woodworking Experience:
Beginner
Great bit!
April 3, 2017
Purchased
 over 2 years ago
Woodworking Experience:
Intermediate
Sharp so be careful.
So sharp that I cut my finger when I accidently brushed it while adjusting the dept of cut. Great bit for making my box joints have experienced no tear out so far.
November 28, 2016
Purchased
 over 2 years ago
Woodworking Experience:
Intermediate
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Why did you choose this?
Rockler Store
need it for box jig
Scott D on Aug 7, 2018
Needed for the Jig
pat k on Apr 30, 2018
need it for box jig
Scott D on Aug 7, 2018
Recommended by you
John H on May 10, 2018
Needed for the Jig
pat k on Apr 30, 2018
price, quality and warranty
Mary Sue d on Mar 7, 2018
Needed a bit
Marshall H on Feb 18, 2018
Making trivets with arcs in them for the grooves. This bit should be helpful
Marcia L on Jan 23, 2018
I heard the up cut bit gives less tear out
Scott M on Nov 10, 2017
I need the up-spiral router bit for the SOS Hinge Template I purchased. I am installing four #204 SOS hidden hinges on the lid of a Footlocker I am building as a HS graduation present for my youngest daughter. (Three years ago I built a similar footlocker for my oldest daughter's graduation. It had a double-wrap piano hinge that Rockler no longer carries. But I want to try something new anyway!)
Kenneth N on Nov 10, 2017
To see if a HHS bit will last long enough to do several projects
Rob L on Oct 3, 2017
Need to resurface my workbench and chose the 3/8 so that I can use it for mortising as well
Benjamin on Sep 5, 2017
Needed to go with jig.
Joe M on Aug 20, 2017
About to try my hand at mortising. Figured I'd buy a mortising bit.
Marvin A on Jul 22, 2017
Use on a router table to cut dadoes
Trevor Z on Jul 14, 2017
for loose tenon mortises
Justin V on Jun 24, 2017
Need for finger joint attachment
DON M on May 13, 2017
This bit will work well with my new Ellipse/Circle Router Jig.
Brian P on Mar 24, 2017
Past experience using this bit has shown it's use last a long operational time compared to other bits.
David W on Mar 5, 2017
Router table box joint jig purchased. Unfortunately, this bit should have been carbide because it didn't last long enough to adjust the set up and cut some material before the bit was too dull to cut. I prefer nice joints to blue smoke.
Terry R on Feb 23, 2017
Suggested for use in making clean box joints.
Michael G on Jan 20, 2017
For mortise cuts.
Philip B on Jan 17, 2017
Sold by Rockler and presumed they only sell quality products.
James J on Jan 12, 2017
Smooth cutting circles
Mr. G on Dec 18, 2016
Required for project
James H on Dec 11, 2016
needed for a project
Charles S on Nov 26, 2016
It worked with the concealed hinge router jig
Stephen A on Oct 25, 2016
Needed for project.
ROBERT M on Oct 23, 2016
It was recommended for use with the router box joint jig. I didn't have one and wanted to try one. I bought HSS version to evaluate it and will get carbide if I like its performance.
cornflaske73 on Oct 22, 2016
Quality and need for box joint bit
ROBERT C on Oct 13, 2016
Bought this to make box joints.<br />Used this with Rockler Box Joint Jig.<br />After working out the fine tuning, Job well done
Bob on Sep 29, 2016
Worked great for cutting circles in plywood using the circle guide template.
David L on Sep 18, 2016
Create cups for cabinet hardware.
Thomas K on Aug 9, 2016
I have a 1/4 inch one I thought a 3/8 inch one wold be useful.
Sherman W on Jun 23, 2016
general cutting bit for my router
David Y on Jun 15, 2016
Wanted to make simple clean box joins
Simon T on May 28, 2016
for box joints
Wilbur M on May 18, 2016
More expensive than HSS but should stay sharp much longer, we'll see.
Gene W on May 15, 2016
I was making cabinets.
JESSE F on Apr 17, 2016
Routing a channel to install a Dual Track in my custom table, and cutting box joints.
J on Apr 3, 2016
Use this to route cup hinge hole.
George M on Apr 3, 2016
regular straight bit in my router for making box joints was not adequate.
Jeff M on Mar 26, 2016
recess routing
R O on Mar 20, 2016
I bought this to use with my Rockler Router Table box joint jig
Robert C on Mar 2, 2016
replacement bit!
Stuart C on Feb 28, 2016
I have one a it's preformed well
Robert P on Feb 24, 2016
The reviews and price
Dane L on Feb 9, 2016
didn't order one
Albert L on Jan 23, 2016
Recommended bit for for router joint jig
J W on Jan 13, 2016
Getting up-cut spiral router bits for use in making box joints.
Robert G on Jan 11, 2016
To install Euro hinges
Jim B on Dec 19, 2015
Husband picked it
Deboarh S on Dec 15, 2015
Recommended by you
John H on May 10, 2018
price, quality and warranty
Mary Sue d on Mar 7, 2018
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  2. The up-cut design helps keep the mortise clear of chips and shavings while you cut.
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