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Rockler Router Bit Center/Depth Gauge

Quickly set your router table fence a precise distance from the center of the bit—also works as a depth gauge for bits and blades.

Item #
55010
Rating:
92% of 100

When setting up your router table or freehand router, there are two primary adjustments to make: the fence distance and the bit height. Our Center/Depth Gauge makes setting both easy and accurate. Just set the hairline indicator for the distance you need from the fence to the center of the bit, hook it onto the bit shank, then slide the fence over until it touches the gauge. To use it as a height gauge, simply set it at your bit height, lay the foot flat on the table and raise the bit until it touches the arm. Half-round notches let you register the gauge to the center of 1/4'' and 1/2'' shank router bits. Alternatively, you can use the ''depth'' portion to measure to the edge of the cutter, rather than the middle of the shank.

Features:

  • Easily set your router table fence a precise distance from the center of your router bit—ideal for routing dados and flutes
  • Also doubles as a height gauge for setting the heights of router bits and blades
  • Half-round notches register to the center of 1/4'' and 1/2'' shanks
  • Broad foot rests against router table fence, and is offset so the fence opening isn't a problem
  • Hairline indicator adjusts for dead-on accuracy
  • 12'' long steel ruler features metric and imperial measurements
  • Nylon-tipped knurled knob secures gauge without marring ruler
  • (1) Rockler Router Bit Center/Depth Gauge
More Information
Brand Rockler
Weight 0.5500
Tech Spec
  • Length: 12''
  • Ruler Material: Steel
  • Graduations: Metric and imperial
4.6 / 5.0
121 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
91
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11
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1
Center/Depth guide
I have not used it yet, but with the current project, I will use it.
June 4, 2020
Purchased
5 months ago
Woodworking Experience:
Advanced
Great product
Have used it for the router table, regular router, circular saw and table saw blade set up and it works so nice! I wish I had it from the start of a previous project, it would have saved so much time in set up
May 31, 2020
Purchased
1 month ago
Makes dado setup for cabinet work so much faster to
setup and change , great tool, love it.
May 26, 2020
Purchased
1 month ago
Woodworking Experience:
Advanced
This tool is perfect. I need to cut slots in the middle of wood slats to a precise depth. I tried to eyeball the first cut but was off by 1/16". Using this tool I was dead on in both the distance from the edge of the material and the depth of cut. It made the job so much easier.
May 25, 2020
Purchased
9 months ago
Woodworking Experience:
Intermediate
Easy to use
Gonna make set up much quicker and accurate
May 24, 2020
Purchased
1 month ago
Woodworking Experience:
Intermediate
Works well
May 21, 2020
Purchased
6 months ago
Woodworking Experience:
Intermediate
very good measurement tool!
I use this for all sorts of things. Handy little gadget to have!
May 19, 2020
Purchased
2 months ago
Woodworking Experience:
Intermediate
Used it several times and so far it’s definitely been a benefit to have
Used it several times and so far it’s definitely been a benefit to have
May 18, 2020
Purchased
2 months ago
Bit centering jig
Simplifies and very accurate router fence placement in relation to bit.
May 17, 2020
Purchased
2 months ago
Woodworking Experience:
Intermediate
router bit center gauge
simple to use, accurate measurements , inexpensive.
May 17, 2020
Purchased
2 months ago
Woodworking Experience:
Intermediate
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions and 60 answers
Why did you choose this?
Rockler Store
I'm getting this now for his birthday as I am hoping to buy the router table later
D D on Jun 4, 2020
To help set my fence location and bit depth for sliding dovetails
chris W on Jun 3, 2020
I'm getting this now for his birthday as I am hoping to buy the router table later
D D on Jun 4, 2020
Need to accurately be able to center bits, etc.
Andrew J on Jun 4, 2020
To help set my fence location and bit depth for sliding dovetails
chris W on Jun 3, 2020
I didn’t know there was such a gauge and saw it in Better Homes and Garden WOOD magazine and I had to buy it. It’s going to save a lot of time setting and checking my router cuts
Greg B on Jun 2, 2020
FOR ITS USE
GENE B on Jun 2, 2020
I work with routers
Juan V on May 31, 2020
Appears to be a unique way of setting up a router table for exact cuts.
Wayne R on May 31, 2020
Very handy gauge for the router table.
Earl M on May 31, 2020
I plan to do a lot of router table work this summer. It seems to be a good time saver.
Patrick H on May 30, 2020
EASY ALIGNMENT AND HEIGHT ADJUSTING
JD on May 29, 2020
great for my router and table saw
anthony m on May 29, 2020
Ease of use
R C on May 28, 2020
New product, and it is something I could use instead of squares and ruler.
Joe R on May 28, 2020
easy of setting up my router table bits
Edward B on May 27, 2020
Always was looking for something like this to measure my bits from the table
ROBERT J G on May 24, 2020
Hopefully this will save a lot of set up time and make router cuts more accurate and repeatable. We shall see, just ordered.
William P on May 20, 2020
Appears to be very helpful in setting up some of my difficult router setups
Dan N on May 19, 2020
The reviews were good so i figured I'd try it.
TIMOTHY F on May 18, 2020
Easier to see how depth or right bit sizes etc...
Stephanie C on May 16, 2020
Looks like an easy setup tool and thought i would give it a try
John G on May 15, 2020
Hoping it helps with precision
JASON EARL G on May 15, 2020
Reasonable price and have been looking for this type of tool for a while.
Steven D on May 14, 2020
ease in setup for routers
Bill D on May 14, 2020
Trying to reduce the time when you setup and text for accurracy
James H on May 14, 2020
Playing the adjust, test on scrap, repeat game gets old. I hope this will make setup easier.
James S on May 13, 2020
measurement for track locations
Gary P on May 13, 2020
Needed it
Mike S on May 13, 2020
To assist with a project.
Jim H on May 13, 2020
to help set fence
Joseph L on May 13, 2020
Time and energy saver
Shane M on May 13, 2020
Simplify setup.
John C on May 12, 2020
appears to be a time saver and accurate
Michael M on May 12, 2020
increase precision
Steven T on May 11, 2020
Good tool
Walt Hoesing O on May 11, 2020
To complete my router table
Peter R on May 11, 2020
intriguing tool
Greg A on May 11, 2020
Time Saver
Tim S on May 11, 2020
I spend too much time with alignment and depth
James K on May 10, 2020
it has to be more convenient than trying to eyeball measure.
Craig W on May 10, 2020
Thought it would help set consistent router setups easier.
Kyle G on May 10, 2020
Speed set up with good accuracy
Dale G on May 8, 2020
hopefully it'll make the router fence set up easier.
Adam T on May 8, 2020
It will help me with setting up for dovetails on the original Incra Jig. You need to center bit on the board to reference the template and jig for the the cuts.
James P on May 8, 2020
Looked like a tool that would be handy for router and saw set ups.
gerald w on May 7, 2020
This is a quick way to measure the center of your router bit to the router fence
John S on May 7, 2020
Great for making mortise templates.
John T on May 6, 2020
This looks like a nifty solution, hope it will work.
Paul A on May 6, 2020
TO PLAY WITH
timothy p on May 6, 2020
I have a complete rockler table and cabinet set up.
Dale B on May 6, 2020
Tired of NOT being able to achieve the correct measurement "Accurately"
Rob M on May 6, 2020
Need to accurately be able to center bits, etc.
Andrew J on Jun 4, 2020
I didn’t know there was such a gauge and saw it in Better Homes and Garden WOOD magazine and I had to buy it. It’s going to save a lot of time setting and checking my router cuts
Greg B on Jun 2, 2020
Hi, does it have any magnets built in?
Randy F on Aug 18, 2019
BEST ANSWER: No, the foot and sidearm are plastic, with metal hardware and ruler. The metal parts will attach to a magnet but are not independently magnetic.
Is there a minimum distance this tool will measure? Can you set it to say, 1/64 from center?
Tim A on Aug 28, 2019
BEST ANSWER: the answer is 2 fold. No there is no minimum and yes you "could" set it @ 1/64th from center...however.
The gauge will go to flush or zero with the fence or table. The ruler markings are in 1/16th and millimeter increments except the first inch is in 1/32nds. The gauge has a flat edge for setting edge depth, along with the 1/4 & 1/2 hollows for center measures.
I seem to most often want to position the fence from the edge of the cut, not the center of the tool. Am I not seeing something important here?
Ed O on Aug 19, 2019
BEST ANSWER: diameter of the bit varies, center is always in the same place, add or subtract bit radius for edge of cut line
Why doesn't the gauge have an edge for measuring between the inside cutter edge of the router bit and the fence? That will be the distance of the cut from the edge of the board and the measure I want to set up most often.
Larry D on Apr 3, 2020
BEST ANSWER: If you know the diameter of the router bit you can use this device to set the fence to the inside edge of the bit.
The cursor in the picture looks well back of the center. It also looks like it is adjustable. Does the center point have to be found and the cursor adjusted to center before the gauge can be used as intended?
Joe M on Aug 19, 2019
BEST ANSWER: If you look at the pictures, you can see the ruler starts at 0, but there's an offset from the fence measurement because of the foot that squares up with the fence. I would guess the offset of the cursor is set up to negate the offset of the foot.
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