Product Description
CMT Mortising Bit with Bearing - 5/8" Diameter x 3/4" Cutting Height, 1/4" Shank is a precision router bit engineered for clean, flat-bottom mortise routing in solid wood and wood composites. Designed by CMT for hinge mortising, lock pocket routing, and template-guided sign work, this carbide-tipped bit delivers smooth, splinter-free results with its negative shear angle geometry and top-mounted bearing guide. Whether you are cutting hinge recesses in hardwood doors or routing precise slots for loose-tenon joinery, this mortising bit handles both natural wood and engineered panels with equal confidence.
Key Features
- Thick carbide tips with negative shear angle design - produces flat, smooth mortise bottoms with no splintering, so hinge seats and lock pockets require little to no clean-up after routing.
- Top-mounted bearing guide included - rides along a template or workpiece edge to maintain consistent depth and alignment, making this bit ideal for sign making, template routing, and repeat hinge mortising tasks.
- 2-flute (2-tooth) cutting geometry - balances chip removal and cut quality, helping maintain clean edges even in demanding hardwood applications.
- Right-hand rotation - compatible with standard handheld routers, router tables, and CNC routing machines without any configuration changes.
- 1/4" shank diameter - fits a wide range of compact and mid-size routers, giving you flexibility across job sites and workshop setups.
- Hardwood-grade carbide material (HW) - engineered to sustain cutting performance through both solid hardwood and wood composite panels, reducing the need for frequent bit changes.
Why This Product
- Purpose-built for hinge and lock mortising - the negative shear angle and thick carbide tips work together to produce the flat bottoms and clean edges that hinge mortising demands, cutting down on hand-tool cleanup after routing.
- Template and sign-making ready - the included top bearing guide lets you follow patterns and templates precisely, making this bit a practical choice for repeatable sign-making and production routing workflows.
- Works across a broad range of panel materials - compatible with solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic, so one bit covers a wide variety of project types.
- Compact 1/4" shank with full 3/4" cutting height - provides enough depth capacity for most standard hinge and lock mortise applications while fitting the smaller collets found on trim routers and compact router tables.
Specifications
- Manufacturer Part Number: 801.158.11B
- Brand: CMT Orange Tools
- Product Type: Mortising Bit with Bearing
- Diameter: 5/8"
- Cutting Height: 3/4"
- Total Length: 2 1/4"
- Shank: 1/4"
- Number of Teeth: 2
- Material: Carbide-Tipped (HW)
- Rotation: Right-Hand (RH)
Approved Applications
- Hinge Mortising
- Lock Mortising
- Mortise Routing
- Slot Mortising
- Template Routing
- Sign Making
Frequently Asked Questions
What materials can this mortising bit cut?
This bit is designed to work with solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic. The thick carbide tips and negative shear angle geometry are engineered to handle both natural wood and wood composites without splintering edges or leaving rough bottoms.
What is the purpose of the top bearing guide on this bit?
The top-mounted bearing guide rides along the edge of a template or workpiece to control lateral movement and maintain consistent positioning during the cut. This makes the bit particularly well suited for template routing, sign making, and any application where repeatable, precise mortise placement is required.
Is this bit compatible with a handheld router, or does it require a router table?
This bit is compatible with handheld routers, router tables, and CNC routing machines. The 1/4" shank fits the collets found on a wide range of compact and standard router models, so you are not limited to a single machine type.
What cutting depth can I achieve with this mortising bit?
The cutting height of this bit is 3/4", which provides sufficient depth capacity for most standard hinge mortise and lock pocket applications. The total length of the bit is 2 1/4", and the shank diameter is 1/4".
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