Product Description
The CMT Contractor Straight Bit with a 5/8" cutting diameter and 1" cutting height is a two-flute, carbide-tipped routing bit engineered for making precise slots, dadoes, grooves, and channels in wood and wood composite materials. Designed for use in handheld routers, router tables, and CNC routing machines, this 1/4" shank bit delivers smooth, efficient material removal with hi-density carbide-tipped cutting edges that produce clean, accurate results on every pass. Whether you are routing joinery in plywood, cutting mortises in solid hardwood, or channeling MDF for cabinetry or millwork applications, this contractor-grade straight bit offers the performance and durability to get the job done right.
Key Features
- Hi-Density Carbide-Tipped Cutting Edges - deliver smooth performance and a precise cut through wood and wood composites, reducing tearout and improving finished surface quality.
- Engineered for Efficient Chip Clearance - the two-flute geometry removes waste material quickly, reducing heat buildup and helping maintain consistent cut quality throughout the full 1" cutting height.
- Designed for Slots and Routing Channels - purpose-built geometry makes this bit the right choice for dadoes, grooves, rabbets, and mortise work in solid hardwood, softwood, plywood, and wood composites.
- Right-Hand Rotation - compatible with standard right-hand routers used in handheld, table-mounted, and CNC routing setups, making integration with existing equipment straightforward.
- 1/4" Shank Diameter - fits the widest range of router collets, giving woodworkers and contractors flexibility across multiple machines without requiring collet adapters.
- Hardwood (HW) Carbide Material - the cutting edges are manufactured from a hard-wearing carbide grade suited to demanding production and job-site routing tasks, extending the usable life of the bit.
Why This Product
- The 5/8" cutting diameter paired with a full 1" cutting height allows woodworkers to rout standard dado widths and deep grooves in a single pass, reducing setup time and improving workflow efficiency.
- The hi-density carbide-tipped construction handles wood composites like MDF, chipboard, melamine, and plywood in addition to solid wood species, giving contractors and shop professionals a single bit that covers a wide range of substrate types.
- The efficient chip clearance design keeps the cutting zone clear during extended routing operations, which helps prevent burning and maintains dimensional accuracy across long cuts or repeated production runs.
- With a compact 2-3/16" total length and a 1/4" shank, this bit fits handheld routers, benchtop router tables, and CNC machines equally well - offering versatility across job-site and shop environments without sacrificing precision.
Specifications
- Manufacturer Part Number: CMT-81125
- Brand: CMT Orange Tools
- Diameter: 5/8"
- Cutting Height: 1"
- Total Length: 2-3/16"
- Shank: 1/4"
- Number of Teeth: 2
- Material: HW (Carbide-Tipped)
- Rotation: Right-Hand (RH)
Approved Applications
- Making slots and routing channels in wood and wood composites
- Straight cuts - dadoes, grooves, and rabbets
- Mortising
- Template routing
- Plywood joinery
Frequently Asked Questions
What router collet size is required for this bit?
This bit has a 1/4" shank, so it requires a router fitted with a 1/4" collet. Many handheld routers and router table setups accept 1/4" shanks as a standard collet option, making this bit compatible with a wide range of common routing equipment.
How deep of a cut can this straight bit make in a single pass?
The cutting height of this bit is 1", which represents the maximum depth achievable in a single routing pass. For harder materials or production work, it is generally advisable to make multiple progressively deeper passes to reduce stress on the bit and achieve the cleanest possible cut.
What materials can this bit cut through?
This bit is designed for making slots and routing channels in wood and wood composites. Compatible materials include solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and similar engineered wood products. The hi-density carbide-tipped cutting edges are well suited to handle the abrasive nature of composite sheet goods as well as solid timber.
Can this bit be used on a CNC routing machine?
Yes. This straight bit is compatible with handheld routers, router tables, and CNC routing machines. The right-hand rotation, 1/4" shank, and two-flute carbide construction make it appropriate for use across all three machine types, provided the CNC machine accepts a 1/4" collet and operates with right-hand spindle rotation.
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