Product Description
CMT 824.121.00 Slot Cutter Arbor by CMT is a precision steel arbor designed to mount CMT 823 series slot cutter blades with a 45 deg. bore. With a 1/2 in. shank and a total length of 2 11/64 in., this arbor provides a solid, stable platform for cutting clean, consistent slots in a wide range of woodworking applications. Whether you are setting up a handheld router, a router table, or a CNC routing machine, this arbor delivers the rigid connection needed between your router and your slot cutter blade - keeping your cuts accurate and your setup repeatable.
Key Features
- Steel construction - provides the rigidity and durability needed to handle the lateral forces generated during slot cutting, reducing flex and vibration at the cutter head.
- 1/2 in. shank - fits standard 1/2 in. router collets found on most mid-range and professional routers and router tables, giving you broad compatibility across your existing equipment.
- 2 11/64 in. total length - offers sufficient reach to properly seat CMT 823 series cutter blades while keeping the setup compact and balanced for precise control.
- Designed for CMT 823 slot cutters with 45 deg. bore - ensures a correct, manufacturer-matched fit with CMT 823 series blades, eliminating guesswork and reducing the risk of improper blade seating.
- Without bearing or stop collar - gives you flexibility to configure your slot cutter setup with your own bearing or collar selection, so you can tailor the cutting depth and bearing arrangement to your specific project requirements.
Why This Product
- If you already own CMT 823 series slot cutter blades with a 45 deg. bore, this arbor is the manufacturer-matched mounting solution - no adapters or workarounds needed for a secure, properly aligned fit.
- The absence of a pre-installed bearing or stop collar means you retain full control over your slot cutter configuration, making this arbor ideal when you want to select a specific bearing size or use an existing collar from your setup.
- Steel construction at this arbor length keeps runout to a minimum, which translates directly to cleaner slot edges and better-fitting joints in solid hardwood, plywood, MDF, and similar materials.
- The 1/2 in. shank maximizes grip in your router collet, reducing slippage risk during the sustained lateral cutting passes typical of slot and groove routing operations.
Specifications
- Manufacturer Part Number: 824.121.00
- Brand: CMT Orange Tools
- Total Length: 2 11/64 in.
- Shank: 1/2 in.
- Material: Steel
- Product Type: Slot Cutter Arbor
- Bearing Included: No
- Stop Collar Included: No
Approved Applications
- Mounting CMT 823 series slot cutter blades with 45 deg. bore
- Slot cutting and groove routing in woodworking
- Use with handheld routers equipped with a 1/2 in. collet
- Use with router tables accepting 1/2 in. shank tooling
- Use with CNC routing machines configured for 1/2 in. shank bits
Frequently Asked Questions
Which CMT slot cutter blades are compatible with this arbor?
This arbor is specifically designed for CMT 823 series slot cutter blades that feature a 45 deg. bore. Always verify your blade's bore specification matches before assembling your slot cutter setup.
Does this arbor include a bearing or stop collar?
No - this model is sold without a bearing or stop collar. This allows you to select and pair your own bearing size and collar to match your specific slot depth and cutter configuration requirements.
What router collet size does this arbor require?
This arbor has a 1/2 in. shank and requires a router or router table with a 1/2 in. collet. It is not compatible with 1/4 in. collet routers without a reducer, and reducers are generally not recommended for slot cutting applications due to the lateral forces involved.
What is the total length of this slot cutter arbor?
The total length of the CMT 824.121.00 arbor is 2 11/64 in. This length is engineered to properly seat CMT 823 series cutter blades while maintaining a compact and balanced profile in your router setup.
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