Product Description
CMT Flush Trim Bits with Insert Knives - 3/4" Diameter x 1-31/32" Cutting Height, 1/2" Shank from CMT are precision router bits engineered for flush trimming, pattern routing, and template routing across a wide range of materials. With a generous 1 31/32 in. cutting height, this bit handles thick laminates, edge banding, hardwood, softwood, plywood, MDF, chipboard, and plastics in a single pass - making it a reliable choice for both hand router and router table setups.
Key Features
- Two Replaceable Insert Knives - each knife is a two-sided reversible insert, so when one edge dulls you flip it to expose a fresh cutting surface, significantly reducing tooling cost and downtime compared to non-replaceable bits.
- TORX Screw Fastening System - special TORX screws lock the insert knives firmly in position during high-speed routing, providing secure knife retention and consistent, repeatable cuts.
- 1 31/32 in. Cutting Height - the extended cutting length allows the bit to flush trim thicker stock and edge banding in one clean pass, eliminating multiple setups or repeated passes.
- 3/4 in. Cutting Diameter - compact diameter is well suited for precise flush trimming and template routing work where controlled material removal is needed.
- 1/2 in. Shank - the larger shank diameter provides superior rigidity and reduced vibration compared to 1/4 in. shank bits, resulting in smoother cuts and improved bit stability at the router.
- Right-Hand Rotation - standard right-hand rotation is compatible with conventional hand routers and router tables, ensuring straightforward setup without special tooling.
- Hardwood (HW) Insert Knives - the HW-grade insert knives are matched to demanding routing tasks including hardwood, MDF, chipboard, laminates, and plastics, staying sharp longer under typical workshop use.
- 4 13/32 in. Total Length - the overall bit length provides adequate clearance for router table setups and hand routing operations without interfering with collet grip.
Why This Product
- The replaceable two-sided insert knife design means you get multiple fresh cutting edges from a single set of knives - reducing the need to purchase replacement bits as frequently and keeping your routing operation cost-efficient.
- The 1 31/32 in. cutting height gives this bit the reach to handle thick laminate panels, solid wood edging, and stacked materials in one pass, cutting workflow time compared to shorter flush trim bits that require multiple passes.
- The 1/2 in. shank is compatible with both hand routers and router tables equipped with 1/2 in. collets, making this a versatile choice for professional shops and serious hobbyists who work with multiple machine setups.
- TORX screw fastening provides a secure, tool-assisted knife clamping method that keeps insert knives locked at operating speed - giving you confidence during demanding flush trim and pattern routing tasks.
Specifications
- Manufacturer Part Number: 657.992.11
- Brand: CMT Orange Tools
- Cutting Diameter: 3/4 in.
- Cutting Height: 1-31/32 in.
- Shank Diameter: 1/2 in.
- Total Length: 4-13/32 in.
- Number of Knives: 2
- Knife Material: HW (Hardwood grade insert knives)
- Rotation: Right-Hand
Approved Applications
- Flush Trimming
- Pattern Routing
- Template Routing
- Edge Banding Trimming
- Laminate Trimming
Frequently Asked Questions
Can the insert knives be replaced when they become dull?
Yes. This bit is specifically designed with two replaceable insert knives secured by special TORX screws. When a cutting edge dulls, you can flip the knife to use the second cutting side, or remove and replace the insert knives entirely - restoring the bit to full cutting performance without replacing the entire bit body.
Is this bit compatible with a 1/2 in. router collet on a router table?
Yes. The 1/2 in. shank is directly compatible with hand routers and router tables equipped with a 1/2 in. collet. The 1/2 in. shank also provides greater rigidity and reduced vibration compared to smaller shank sizes, which is beneficial for flush trimming and pattern routing applications.
What materials can this flush trim bit cut through?
This bit is suited for routing hardwood, softwood, plywood, MDF, chipboard, laminates, and plastics. The HW-grade insert knives are designed to handle the demands of these varied materials in typical flush trim and template routing operations.
Does this bit include a ball bearing guide for flush and pattern routing?
The CMT product data notes that guided flush trim bits of the 657.1 type are equipped with ball bearing guides. Refer to the specific model variant in the 657.1 series for ball bearing guide specifications, as individual configurations may vary by model number.
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