In stock
Tight miter joints are a hallmark of fine woodworking, and this bit will cut them in spades.
Grouped product items
Product Name Price Qty
1-3/4" D x 3/4" H x 1/2" Shank Rockler Lock Miter Bit
1-3/4" D x 3/4" H x 1/2" Shank Rockler Lock Miter Bit Item #: 22627
In stock
$69.99
Each
2-3/4" D x 1-1/16" H x 1/2" Shank Rockler Lock Miter Bit
2-3/4" D x 1-1/16" H x 1/2" Shank Rockler Lock Miter Bit Item #: 91722
In stock
$79.99
Each

Rockler 45° Lock Miter Router Bits - 1/2'' Shank

Item #
GRP40073
Rating:
84% of 100
Rockler 45° Lock Miter Router Bits - 1/2'' Shank Rockler 45° Lock Miter Router Bits - 1/2'' Shank Rockler 45-degree Lock Miter Router Bit
Rockler 45° Lock Miter Router Bits - 1/2'' Shank

The interlocking fingers of our Lock Miter Router Bit provide a strong mechanical locking action that makes it much easier to clamp. There is no tendency for the joint to slide out of alignment under clamping pressure, and the wedged tenons tighten up nicely for a strong corner joint. The increased long grain gluing surface also helps to strengthen the joint over a basic rabbet or butt joint. Machining parts with the Lock Miter Bit is easy—with the bit height set, one part is cut horizontally on the router table, while the corresponding part is cut vertically. The bit is ideal for joining drawer boxes, cabinet parts, and for building 4-sided columns.


Note: To make setting the cutter height easy and fool-proof (Applicable for Item 22627), use the Rockler Router Bit Set-up Jig (53817, sold separately) to center the bit on your stock.

(1) Rockler 45 Degree Lock Miter Router Bit
More Information
Brand Rockler
Weight 0.7000
Tech Spec
  • #22627 is for 3/8" to 3/4" thickness
  • #91722 is for 5/8" TO 1 1/8" thickness
Technical Documents
Bit Type Drawer Lock
Shank Size 1/2"
Flutes 2
Prop 65 WarningWARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov

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 www.P65Warnings.ca.gov/wood.
4.2 / 5.0
71 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
45
12
5
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5
Special project
I purchased a locking miter bit from another source then purchased Rockler's set up block. I found out after MANY attempts, the Rockler set up block can ONLY be used with a Rockler bit. I then purchased a miter bit from Rockler and with some minor adjustments was able to make the 45 degree locking miter cut and it fit nice and tight.
May 20, 2019
Purchased
3 weeks ago
Woodworking Experience:
Intermediate
Lock Miter Bit
After testing the router bit on a few wood scraps, I was able to produce a beautiful walnut box. The fit was perfect, and I like the jig for setup. For me it was much easier than making a box joint.
Walnut Pistol Box
Walnut Pistol Box
May 8, 2019
Woodworking Experience:
Intermediate
Ten stars
If I could give it ten stars I would. Set up correctly this makes the most perfect and incredibly strong joints you could want.
April 28, 2019
Purchased
over 2 years ago
Woodworking Experience:
Advanced
I'm an amateur and this was EASY!!
I bought this for making drawers and other small boxes and nailed the setup using the setup jig on the first attempt. It was super easy. I'm using a Porter Cable 690 and a Bosch premade router table from a big box store (I'm in amateur but learning). I just set the depth, running the bit up until it just hit the bottom of the jig and then set my fence and it made a perfect joint on the first cut. I love it.
April 14, 2019
Woodworking Experience:
Beginner
Surprisingly easy to use, great results
Based on some of the comments and online videos I expected a very protracted setup. Was surprised by the ease of use. After only 2-3 test passes was producing high quality boxes in both 3/4" poplar and 1/2" maple. Tight joints, very strong. Highly recommend. One caveat - I am using a router lift and Incra micro-adjustable fence, and those gave the the ability to make very exact and minute adjustments - I'm sure this helped.
February 20, 2019
Woodworking Experience:
Intermediate
Worked great
Bought the bit to make columns for new screen porch. Used 1/2” pvc sheet stock and made four 8”x8’ sides. Routed both edges and put the columns together. Corners were very tight and sharp. Very pleased with the results.

Set up is a little tedious. Used two test pieces and slowly tweaked it till it was right. Made a set up block for the future. Download the set up instructions. Page 2 was very helpful.
September 6, 2018
Purchased
10 months ago
Woodworking Experience:
Advanced
45 degree miter bit
Design well and cuts very well. would recommend.
June 14, 2018
Purchased
1 year ago
Woodworking Experience:
Intermediate
Works like a dream
This was a bit touchy to set up but once you have it dialed in it’s just perfect. I’ll be using this bit all the time.
May 11, 2018
Purchased
1 year ago
Rockler lock miter bits
Excellent bit very clean-cuts. Just make sure to route in increments when doing lock miter projects.
March 6, 2018
Purchased
over 2 years ago
Woodworking Experience:
Intermediate
lock miter bit
Worked perfect first time on practice piece. You must use the set jig to get right. Put the jig to the bit and set height and then without moving jig bring the fence to the jig lock it down and go.
February 27, 2018
Purchased
1 year ago
Woodworking Experience:
Intermediate
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 37 questions Browse 37 questions and 122 answers
Why did you choose this?
Rockler Store
specific projects for my class
Paul W on Jul 12, 2018
making draws
dale t on Jun 17, 2018
specific projects for my class
Paul W on Jul 12, 2018
To make box shelves
Thomas H on Jul 1, 2018
making draws
dale t on Jun 17, 2018
I intend to make funeral urns for veterans.
Bruce B on May 30, 2018
Recommendation of a friend who has this bit.
Bruce L on May 23, 2018
Upcoming project...5' candle stand for church.
Larry W on May 10, 2018
need this for upcoming project.
Ken G on Mar 29, 2018
It seemed to be the best router bit for the job I want to do.
Wanda D on Mar 21, 2018
To make drawers
Bruce W on Mar 17, 2018
Want to make some frames and boxes.
PAULA B on Mar 17, 2018
I wish to make drawers
Mr. G on Mar 16, 2018
Look like a great bit for picture frames.
Dan N on Mar 11, 2018
Can't get a good miter cut from miter or table saw so this is my next attempt!
Randy C on Mar 8, 2018
i want to try it.
steven B on Mar 7, 2018
cabinetry
Frederick C on Mar 5, 2018
Right bit for a special project.
Avelino F on Mar 3, 2018
I have the larger one and wanted the smaller on for smaller projects
Dan C on Mar 1, 2018
Want to try something new
John F on Feb 22, 2018
Boxes
Robert R on Feb 19, 2018
I am interested in seeing the quality of parts it can produce
Samuel L on Feb 12, 2018
we are builders and it will be helpful to our contractors
catherine c on Feb 10, 2018
It is for some work I am going to start in march
Ted C on Feb 10, 2018
because i am making a box and it looks neat
jason r on Feb 9, 2018
I love using my router table for projects and I think this bit will make upcoming drawer box construction much quicker
Dru S on Feb 9, 2018
Trust your products
Dan O on Feb 7, 2018
Needed It
Suzanne C on Feb 7, 2018
building some drawers
Emery C on Feb 5, 2018
OMG, who wouldn't? Mitering on a whole different level.
Claire C on Feb 4, 2018
better joints
Duane H on Feb 2, 2018
had the matching setup jig.
Yee B on Jan 31, 2018
I wanted another way to join corners.
Lynn N on Jan 23, 2018
to build column
Tim Z on Jan 18, 2018
Creates a nice strong joint for boxes and other wood working projects. It enables the wood's grain to be continuous around the corner.
Jim M on Jan 9, 2018
needed it for a beam box project
Glenn S on Dec 26, 2017
wanted it
craig s on Dec 22, 2017
For better looking and more accurate joints!
Norman T on Dec 14, 2017
cabinet and bookshelf construction
Larry A on Dec 13, 2017
Decorative joinery for frames and display cases. Miter saw does not cut exactly 40 degrees which resulted in open joints. Plus, mixing species of wood (walnut with maple) creates an intricate pattern.
David N on Dec 13, 2017
I LIKE THIS TYPE OF JOINT
ELDON C on Dec 12, 2017
Once the set up is complete it is easy to make many drawer parts in a relatively short period of time with good consistency.
Dwight S on Dec 9, 2017
Christmas gift
Charles F on Dec 6, 2017
just wanted it
chris g on Nov 28, 2017
I am building drawers with dado joints for the bottoms and want to conceal the dado on the corners.
Mark C on Nov 25, 2017
For a more secure and tight fitting miter corner
ARTHUR F on Nov 23, 2017
looking to make more use of my router table... starting to explore making small boxes and drawers
Susan S on Nov 3, 2017
Because I can use it for drawer and column, make tight córners every time.
Luis R D on Oct 23, 2017
Wanted to add a reliable bit to complete a project
Susan S on Oct 13, 2017
i love these lock type rockler router bits they do the job better than most of the competition
Bill M on Oct 2, 2017
I plan to use it for decorative boxes.
Julie P on Aug 31, 2017
I want to build drawers with this bit
Ronnie B on Aug 21, 2017
To make box shelves
Thomas H on Jul 1, 2018
I intend to make funeral urns for veterans.
Bruce B on May 30, 2018
Can the bit be used on 1- 1/2 PT stock?
A shopper on Jul 25, 2015
BEST ANSWER: Possibly if set up correctly. I used it 3/4" stock for bookcase carcasses.
What is each sized bit good for? I will probably be using mostly 3/4" and 1/2" plywood.
Concerned on Feb 16, 2016
BEST ANSWER: Rockler specs: small bit 3/8 to 3/4 stock, big bit 5/8 to 1-1/8 stock
I'm getting kickback from this bit. I'm using it to cut 1/2" oak, and even if I use a 1/4" spacer to cut in two passes, and go slow (so slow the wood burns) , I still sometimes get kickback. Any advice?
Bob A on Nov 26, 2017
Hi. I need to purchase a lock miter router bit. It's to cut Brazilian Walnut and Cumaru. The stock is a little over 5/8" (21/32"). Given that this thickness is in the sweet spot available to both #22627 and #91722 lock miter router bits, is there a benefit to using the smaller radius of #22627? Any further recommendations? Thanks.
Robert V on Feb 15, 2017
I seem to be getting a lot of chip out on the vertical cuts with my lock miter bit. Up to this point I've only been using poplar. What can I do to control the amount of chip out? There is no problem with the horizontal cuts.
traugh on Apr 19, 2016
BEST ANSWER: You are cutting across the grain with the vertical cuts. I would setup the bit correctly as others have said and then add two 1/4" thick fence spacers to effectively push the piece out 1/2" and make a pass with a stop block to push it through and feather boards. Once you make that pass, remove one 1/4" spacer and run it again. Then remove the last spacer and run it a final time. Once you set it up you don't want to move the fence from the correct position. Slow the router down and go fairly slow. You also need to keep the piece perfectly in place.
Can this bit be used on plywood?
A shopper on Jul 18, 2015
BEST ANSWER: I think there would be to much chip out. It works well with hard wood not so well with soft woods. The tenons don't hold up with with pine and poplar.
Can this bit be used to build columns and or beams?
A shopper on Jun 6, 2015
BEST ANSWER: I have not tried that but I believe after using it for a keepsake box it is possible and had considered that. 3/4 inch material and minor adjustments for set up are the key or buy the set up blocks from Rockler. Good Luck! Let us know how it works.
What is the recommended speed setting?
Ron D on Jun 28, 2016
BEST ANSWER: The short answer might be NO MORE THAN 18,000 RPM. The longer answer is best developed by carefully reading a web page found by searching for "router bit speeds" Now, this will take some interpretation, but, you should be able to come up with a safe working speed. I do recommend the set up jig Rockler item # 53817 as it will get you better results.
Can this bit (91722) be used for jointing picture frame corners?
ed g on May 6, 2016
BEST ANSWER: The bit creates a 90 degree box joint as shown. So creating a picture frame can be done with the bit, but it depends on the width of the picture frame sides. If the width exceeds the profile of the cutter, it will not work.
Has anyone used this router bit to make a locking joint on 1/2" clear acrylic sheet? Hoping to make a clear 4 sided tower that is 8 feet tall without a framework and wondering how well it performs.
Mike S on Sep 24, 2018
BEST ANSWER: Mike, I haven't used a Lock Miter Router Bit on acrylic sheet, but I have tried to mill a slot into acrylic sheet and it melts and even can burn to a dark brown. I probably was running at about 600 RPM. I would imagine a router spinning much faster would be worse. You might find a machine shop who could use the 45° Lock Miter bit in a mill running slower RPM and using a coolant/lubricant and get the job done, but dry is almost a sure thing to melt and gum up the bit. I would also expect a lot of chip out with it. You might try drilling some acrylic at different speeds and you can see the difference that RPM makes. I wish I had a better answer for you. If someone else does I'd love to hear it. Rockler does make the plastic setup jigs for the bits like the Lock Miter, but not with acrylic. They use HDPE which cuts much better than acrylic and has almost a lucubrating quality to it. Good luck with your project. It would be a great teaching tool for a wood class to have a clear example of how the joint goes together.
Anybody used this #22627 (sm one) on 3/8" thick stock?
Hank on May 5, 2018
Is there any way to use this bit with a fixed or plunge base? I do not have a router table.
Nathan G on Dec 20, 2015
BEST ANSWER: I don't believe I would recommend it due to the size of this bit in a handheld. A makeshift router table could be had from a hole in a Workmate top, a piece of 3/4 ply fastened to a bench, etc. This definitely require a fence to use correctly and safely though. Clamp a fence to your table securely!
How would this bit work for joining MDF?
Mark S on Mar 7, 2017
BEST ANSWER: I have used it to wrap posts using MiraTEC witch is like an exterior MDF I don't see why it wouldn't work on MDF with a good glue.
Does it work with plywood?
Jill L on Jan 7, 2019
BEST ANSWER: not sure , never tried it on plywood. Probably ok with backup to reduce splintering
Will this bit work with 3/8" hardwood stock, endjoints?
Big R on Sep 16, 2017
BEST ANSWER: No, it’s designed for 3/4 stock.
Can this be used on 1/2" thick stock?
Chili on Feb 15, 2016
BEST ANSWER: I completed my first drawer box using this bit on 1/2 inch stock. I had purchased a set up block only to learn that it is designed for three-quarter inch stock. To make the 1/2 inch cuts, I had to lower the bit to fit within the confines of that 1/2 inch. Once you have it set, make sure and make your own reference block for future cuts and go to town.
making a box frame; how to set up an end cut on the router table,using this bit?
Nick M on Oct 25, 2015
BEST ANSWER: There are some good videos on You Tube you can use as a reference but I would suggest the set up jig from Rockler as an indispensable tool. The Rockler site has a technical document that is well done and free for download also. Look up the bit and scroll down to the Technical document. Have fun and be safe.
Will the bit work on stock that is slightly larger or smaller than 3/4 inch?
Al H on Oct 23, 2015
BEST ANSWER: if you take care to place the tongue and groove of the lock mitre in the centre of the board then it will work as the rest of the cut is a straight up 45 degree. if the stock is too much larger then you might have to clean up with handplane or chisel. Not hard just fiddly. be sure that the stock is thick enough to get the tongues plus a few mm either side.
Do you have to have 2 different bits to make to joint?
Tom C on Feb 7, 2019
BEST ANSWER: No, watch video see how it’s vertical and then horizontal, look around on YouTube
Also the overview helps explain process. Does this help?
how can this bit do both side?
ron p on Mar 2, 2018
BEST ANSWER: You run 1 piece flat to the router table and the mating piece vertical against the fence.
There is a glue-up technique for miters by aligning the joint edges while on the flat, then tape the corners together, firmly, and still open. Flip it over to expose the 45's and apply glue. Fold the taped joints closed and "done" -- no clamps!.
I have an 8' 4x4 column I want to wrap in that manner and my question is: There Is an angle to the tendon and the mortar as well. Is it sufficient to allow the joint to swing together in such a taped manner?
David S on May 19, 2017
BEST ANSWER: If I'm understanding your question correctly you are intending to form a close fitting box surrounding a 4 x 4 using the lock miter for the joinery. If you mean to joint the mating surfaces of the lock miter then splaying them open to introduce the glue then taping instead of clamping. There is a risk of snapping off that little tenon but if you are very careful you might pull it off. The lock miter is a pretty good gripping joint if you cut the mating parts very well. I'm not sure why you are avoiding clamping but have your reasons. There are stretchy band type clamps available that would wrap around you four sided assembly you might look for. Another thought would be to assemble the whole thing and only glue two joints leaving one of the side dry and use clamps. when they cure you can glue and slip the remaining side in. Of course I may have your intent wrong. Seek some tension band and see if that might apply to your application.
Are the lock miter bits made in the USA?
Robert F on Dec 30, 2016
BEST ANSWER: I don't know i buy them and put them in my bit dwar till i find time to use them, tools are something you want to have when you want them on hand, not when you needed it yesterday.
Will this work with 3/4 Baltic birch or Maple plywood?
Jeff P on Aug 14, 2015
BEST ANSWER: yes but don't push it go slow so it will not brake out the wood.
Will this bit work on plywood?
Marvin P on Mar 27, 2019
BEST ANSWER: It should, although you may get some splintering depending on the quality of plywood you purchase. I used mine on solid wood and on plastic deck material and it worked great. I also purchased the plastic jig for setting up the router depth and found that to be quite helpful.
Which bit do I purchase for 3/4" material?
Richard B on Feb 19, 2019
BEST ANSWER: #22627 is for 3/8" to 3/4" thickness
Can you make a completely enclosed (six sided) box with this bit?
KMorrison on Jun 19, 2018
BEST ANSWER: I haven’t tried that, but it is a bit for 4 corners being as it’s a 45 degree but. Thanks
I was sent a router template that pertains to rpm. I created a router table using a conventional hand router. The highest speed setting is 3200 rpm. I bought this larger 45 degree 1/2 to use because I’m using a 1” board thickness. Can I use this larger bit, do I have enough rpm for it?
Roland G on May 17, 2018
BEST ANSWER: yes you do
I will be using this bit on 3/4 red oak. I understand that the pieces wood to be joined are routed vertically and horizontally. Is this bit designed to rout the wood in a single pass or multiple shallow passes?
Lou K on Apr 29, 2018
BEST ANSWER: I use multiple passes when I use this bit, but I really like the joints it makes. They are nice tight and square, it does take some time to get the height setup right. I made a template out of a teflon block to speed the setup time.
What speed should be used for this bit?
Tim Z on Jan 24, 2018
BEST ANSWER: I have found that it varies with material being used. Best way is to use scrap from your project and run samples for best results.
Can I use this on a compound angle ?
mark j on Aug 4, 2017
BEST ANSWER: I haven't tried, I don't know.