Product Description
The CMT Stop Collar for 3/8" Shanks is a precision accessory designed to work with top bearing router bits, giving woodworkers and CNC operators reliable, repeatable depth control on every pass. By locking firmly onto a 3/8" shank, this collar sets a fixed travel limit so the bit cannot be pulled through the collet or chuck under load - protecting both your tooling and your workpiece while delivering consistent results across repeated operations.
Key Features
- Designed for top bearing router bits - engineered specifically for use with top bearing bit configurations, ensuring secure positioning and reliable performance during routing operations.
- 3/8" shank compatibility with 9.52mm bore diameter - the precisely machined bore fits 3/8" shanks accurately, preventing slippage and maintaining a stable, locked position throughout the cut.
- Depth control capability - limits bit travel to a set cutting depth, allowing you to repeat the same depth of cut pass after pass without re-measuring or re-adjusting.
- Prevents bit pullout - holds the bit securely in place under cutting load, reducing the risk of the shank being drawn through the collet or chuck and protecting both the tool and the machine.
Why This Product
- If you run repeated cuts at the same depth - such as dadoes, rabbets, or template routing - this stop collar eliminates the need to re-measure between passes, saving setup time and reducing error.
- The 9.52mm bore is sized precisely for 3/8" shanks, making it a direct match for the shank diameter rather than a loose or improvised fit, which means more consistent bit positioning under tool load.
- Bit pullout is a real risk when routing dense materials or running aggressive feed rates - this collar acts as a physical stop that keeps the shank anchored in the collet, adding a layer of safety to your setup.
- Compatibility with top bearing router bits makes this a natural pairing for template and pattern routing workflows where the bearing rides a guide and cutting depth must be precisely maintained.
Specifications
- Manufacturer Part Number: 541.006.00
- Brand: CMT Orange Tools
- Product Type: Stop Collar
- Compatible Shank Size: 3/8"
- Bore Diameter: 9.52mm
- Country of Origin: Made in Italy
Approved Applications
- Setting a repeatable cutting depth on router bits and drill shanks
- Preventing bit pullout through the collet or chuck under cutting load
- Template and pattern routing with top bearing router bits
- Use with routers, drill presses, and CNC routing machines
Frequently Asked Questions
What shank size does this stop collar fit?
This stop collar is designed for 3/8" shanks and features a bore diameter of 9.52mm to match that shank size precisely.
What type of router bits is this stop collar designed for?
According to the product data, this stop collar is specifically designed for use with top bearing router bits, where it helps maintain consistent depth of cut and bit position.
How does a stop collar prevent bit pullout?
The collar locks onto the shank and acts as a physical stop against the collet or chuck face. This prevents the bit from being drawn further into - or pulled through - the collet under the forces generated during cutting.
Can this collar be used on a drill press or CNC machine, not just a router?
Yes. The stop collar is compatible with any machine that accepts a 3/8" shank tool, including routers, drill presses, and CNC routing machines, wherever repeatable depth control is needed.
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