Product Description
The CMT Contractor Straight Bit - 1/4 in. Diameter x 5/8 in. Cutting Height, 1/4 in. Shank is a single-flute, carbide-tipped routing bit engineered for making clean slots, dadoes, grooves, and channels in wood and wood composite materials. With a compact 1 7/8 in. total length and right-hand rotation, this straight bit is well suited for use in handheld routers, router tables, and CNC routing machines wherever a 1/4 in. shank is required. The hi-density carbide-tipped cutting edge delivers smooth, precise results while the bit geometry promotes efficient chip clearance - keeping cuts clean and reducing heat buildup during operation.
Key Features
- Hi-density carbide-tipped cutting edge - provides smooth performance and a precise cut, meaning less tearout and cleaner slot walls in wood and wood composites
- Designed for slots and routing channels - purpose-built geometry for dadoes, grooves, and mortises so the bit tracks accurately and removes material efficiently
- Engineered for efficient chip clearance - the single-flute (1-tooth) design keeps the flute path open, reducing material packing and heat buildup during extended routing passes
- 1/4 in. shank - fits the widest range of consumer and professional routers, making this bit a versatile addition to any woodworking shop or job site setup
- Right-hand rotation (RH) - matches standard router spindle direction so the bit engages material correctly and tracks predictably along a guide or template
- Compact 1 7/8 in. total length - low profile reduces vibration and runout, helping maintain straight, consistent cuts across the full 5/8 in. cutting height
Why This Product
- The 1/4 in. cutting diameter is ideal for narrow dadoes, small mortises, and fine joinery work where a larger bit would remove too much material - giving woodworkers precise control over slot width.
- The 5/8 in. cutting height provides enough depth for common dado and groove applications in plywood and solid wood without requiring multiple plunge passes, saving time and setup effort.
- The hi-density carbide tip is matched to the hardness demands of wood composites like MDF and chipboard, materials that are notoriously abrasive and quick to dull lower-grade tooling.
- The single-flute design paired with efficient chip clearance engineering means this bit stays cooler during continuous routing operations, helping extend cutting life and maintain edge quality over time.
Specifications
- Manufacturer Part Number: 81108
- Brand: CMT Orange Tools
- Diameter: 1/4 in.
- Cutting Height: 5/8 in.
- Total Length: 1 7/8 in.
- Shank: 1/4 in.
- Number of Teeth: 1
- Rotation: Right-hand (RH)
- Blade Material: HW (Carbide-Tipped)
- Product Type: Contractor Straight Bit
Approved Applications
- Straight cuts - dadoes, grooves, and rabbets in wood and wood composites
- Routing channels and slots
- Mortising
- Template routing
- Plywood joinery and panel work
Frequently Asked Questions
What materials can this straight bit cut?
This bit is designed for making slots and routing channels in wood and wood composites. That includes solid hardwood, softwood, plywood, MDF, and chipboard - any wood-based panel or dimensional lumber where a clean dado, groove, or mortise is needed.
What type of router is this bit compatible with?
The 1/4 in. shank fits the collet of most standard handheld routers and router tables that accept 1/4 in. tooling. It can also be run in CNC routing machines equipped with a 1/4 in. collet. Always verify your router's collet size and maximum RPM rating before use.
Why does this bit have only one tooth (single flute)?
The single-flute design is engineered for efficient chip clearance. With one flute, the chip evacuation path stays open longer between passes, which reduces heat buildup and material packing - especially important when routing softer composites or making deeper passes in a single direction.
What is the maximum depth of cut this bit can achieve?
The cutting height is 5/8 in., which is the maximum depth of material the carbide-tipped edge can engage in a single pass. For depths greater than 5/8 in., multiple progressive passes are recommended to maintain cut quality and reduce stress on the bit.
Reviews
FAQs
Standard Shipping is free on most orders over $50 within the contiguous US. If the order is under $50.00, the shipping is $9.99 set fee for shipping within the contiguous US.
Most of our products will ship within 1 to 3 Business Days. Some Special order products will ship within 2 to 5 Business Days. Preorders will be shipped to you on a first come first serve basis as soon as available from the manufacturer. Items that are "Made-to-Order" (Custom order products) will be shipped when fabrication is completed, shipping and delivery times will vary and depend on manufacturing.
Products that are shipped directly from the manufacturer will have processing and fulfilment times subject to manufacturer availability.
Preorders are shipped on a first come first serve basis as soon as available from the manufacturer, the sooner you place your Preorder the sooner your order will ship.
Freight shipping Policy:
Orders/Items too large or heavy may require special handling/Shipping and may require to be sent by truck. Someone must be present to accept truck deliveries. Standard truck delivery is to a dock facility designed to receive freight. You will be notified within 24 hours of ordering to confirm delivery. Lift gates for deliveries are available for an additional fee.
We offer Financing options through Clicklease
Please email your Return request to info@FactoryDirectSupplyOnline.com
Include the order number and the reason for your return.
All returns, regardless of their categorization, must include all original parts, be in their original packaging, and in the condition in which they were received. You may not qualify to receive a refund If the returned item is used, damaged, missing any parts, or is damaged during return shipping.
Checkout our complete Return policy
You can contact us through our contact page! We will be happy to assist you.