A Radius Gauge made of orange plastic, marked with measurements from 25 mm to 150 mm, lies on a gray background.
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Radius Gauge

(18 Reviews)

$22.00

NEW 2nd generation includes a 5mm increment rule scale on the bottom side.

A simple but handy tool for marking out tenons while between centers.

In stock (can be backordered)

SKU: MT036 Categories: , Tags: , , Brand:

Product Info

The Radius Gauge is designed and 3D printed in house by me (Tod Raines). This handy tool will aid in marking tenon diameters wile your turning is between centers.  The hook part rests on a 3/4″ diameter thread of your live center. The 2nd generation design now incudes a simple rule on the bottom side. This handy scale with 5mm increments allows you to measure the chuck jaws with this tool. More convenient now as two uses in one.

The top marking scale is in millimeters with a pencil trough every 5 mm. Why millimeters? Since this is a radius gauge, dividing your tenon diameter in half is much easier. For example, a 60mm tenon requires a 30mm radius. However a 2 3/8″ tenon would require a 1 3/16″. It just seems too hard for me to split fractions in half.

A small magnet on the back makes it handy to store right at the lathe.

Additional information

Weight 0.5 lbs
Dimensions 8 × 1 × 0.75 in

Customer Product Reviews

Radius Gauge
Ian
Rating: 5/5
great Service
Service could not be better. Can review products once received.
Mon Sep 14 2026 17:13:19 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Dave P.
Rating: 5/5
Great Tool!
Much more convenient to use when marking out a radius than having to set calipers. I use it for more than just marking out tenons for my chuck jaws. I made a set of furniture coasters and used this to mark out the diameters.
Thu Aug 13 2026 00:01:35 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Jim Lambie
Rating: 5/5
Radius gauge
Great product,easy to use and accurate
Fri Feb 27 2026 20:25:01 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Todd Bowen
Rating: 5/5
Love this product. So easy.
this is made my workflow on delay much faster. Note of caution it is a little fragile, but not so much that it should stop you from making the purchase. Just treat it with care.
Thu Feb 19 2026 15:15:37 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Mark Gist
Rating: 5/5
No Review
Fri Sep 26 2025 05:00:00 GMT+0000 (Coordinated Universal Time)
Radius Gauge
David Rose
Rating: 5/5
What a great idea. Great item, made to a high quality and standard. Fast shipping.
Tue Sep 16 2025 05:00:00 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Gordon Kincheloe
Rating: 5/5
This tool provides instant help in setting up the location tenon identification. Sure beats getting out the calipers and it is much safer. Easy to store and has a simple setup. Highly recommend!!
Tue Sep 16 2025 05:00:00 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Andy Henderson
Rating: 5/5
Great Tool!
This tool is great, a very easy way to mark the correct diameter for the tenon. Much better and safer than using dividers.
Mon Sep 15 2025 05:00:00 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Richard Davis
Rating: 5/5
No Review
Sun Aug 24 2025 05:00:00 GMT+0000 (Coordinated Universal Time)
Radius Gauge
Gregg Miller
Rating: 5/5
RAdius Gauge
Great little tool! As easy to use as it looks. Thanks Tod for creating this.
Thu Jun 26 2025 05:00:00 GMT+0000 (Coordinated Universal Time)

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