Product Description
CMT 307.080.11 Dowel Drill 5/16" x 40 x 67mm RH by CMT is a precision-engineered boring tool built for clean, accurate blind-hole drilling in furniture panels, cabinet components, and solid wood assemblies. Featuring a tungsten carbide (HW) cutting head mounted on a super-strength steel body, this right-hand rotation dowel drill delivers flat-bottomed holes with consistent wall quality - making it the right choice for production dowel joinery in chipboard, MDF, hardwood, and coated panel materials. The 5/16" diameter and 40mm cutting height suit panel processing applications where a medium boring depth is required, while the 8x20mm parallel shank fits standard multi-spindle boring machine chucks and CNC boring centers.
Key Features
- HW (Tungsten Carbide) Cutting Head on Super-Strength Steel Body - carbide hardness maintains a sharp cutting edge through high-volume panel runs, reducing regrinding frequency and keeping cycle times consistent.
- 2 Precision-Ground HW Cutting Edges (Z2) - dual carbide edges share the cutting load symmetrically, producing smooth bore walls and minimizing heat buildup that could cause tearout or burning in laminates.
- 2 Negatively Ground Spurs (V2) - the negative grind geometry scores the perimeter of the hole before the cutting edges lift material, delivering a clean, chip-free entry point with no splintering on coated or veneered surfaces.
- Precision Balanced Centre Point - the centring point registers accurately on the workpiece before the spurs engage, preventing bit walk and ensuring each hole is drilled exactly on layout - critical in multi-spindle dowel boring operations where hole alignment directly affects joint fit.
- Right-Hand (RH) Rotation - standard right-hand rotation is compatible with the overwhelming majority of multi-spindle boring machines and CNC boring centers, making this drill a direct fit into most production setups without adapter changes.
- 8x20mm Parallel Shank - the precision-ground parallel shank with driving flat seats securely in standard boring machine chucks, eliminating slippage under load and maintaining consistent hole depth across a full production run.
- 40mm Cutting Height / 67mm Overall Length - the medium-series body length provides sufficient boring depth for blind dowel holes in furniture panels while keeping the tool compact enough for tight spindle spacing on multi-row boring heads.
Why This Product
- The negatively ground spur geometry is specifically suited to laminated and coated panels - where a positively ground or aggressive spur would chip the decorative surface - giving furniture manufacturers clean hole entries on melamine, HPL, and veneer-faced boards without secondary finishing.
- With a 5/16" diameter, 40mm cutting height, and 8x20mm shank, this tool matches the standard dimensional requirements for dowel boring in flat-pack and cabinet carcass construction, fitting directly into existing multi-spindle boring heads without custom adapters.
- Dual HW carbide cutting edges (Z2) combined with 2 precision-ground carbide spurs (V2) mean the tool maintains geometry longer than high-speed steel equivalents - reducing per-hole tool cost in chipboard and MDF applications where abrasive binders cause rapid HSS wear.
- The precision balanced centre point ensures repeatable hole positioning from the first hole to the last in a production batch - an important factor in dowel-jointed furniture where even small positional errors accumulate into misaligned assemblies.
Specifications
- Manufacturer Part Number: 307.080.11
- Brand: CMT Orange Tools
- Product Type: Dowel Drill
- Diameter: 5/16"
- Cutting Height: 40mm
- Total Length: 67mm
- Shank: 8x20mm
- Number of Cutting Edges: 2 (Z2)
- Number of Spurs: 2 (V2)
- Spur Sharpening: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Right-Hand (RH)
Approved Applications
- Blind hole drilling for dowel connections in furniture panels
- Cabinet carcass boring and panel processing
- Flat-pack furniture component drilling
- Multi-spindle CNC boring machine operations
- CNC boring center and panel processing center applications
- Boring machine operations using adapter or chuck
Frequently Asked Questions
What materials can this dowel drill be used on?
This dowel drill is designed for blind hole boring in solid wood (hardwood and softwood), chipboard, MDF, HDF, plywood, laminates, and coated panels. The negatively ground carbide spurs are particularly effective on laminated and coated surfaces where clean, chip-free hole entries are required.
What does "negatively ground spurs" mean, and why does it matter?
Negatively ground spurs have a geometry that scores and severs the surface fibers around the perimeter of the hole before the main cutting edges remove material. This produces a clean, defined hole rim with minimal tearout - an important characteristic when boring melamine-faced chipboard, HPL panels, or veneered surfaces where splintering at the hole entry would be visible or would compromise the finished joint.
What machines is the 8x20mm shank compatible with?
The 8x20mm parallel shank with driving flat is the standard shank format for multi-spindle CNC boring machines, CNC boring centers, and panel processing centers used in furniture and cabinet manufacturing. It can also be used in single-spindle boring machines fitted with a compatible chuck or adapter.
What is the difference between a 4-flute dowel drill and a standard twist drill for boring dowel holes?
A 4-flute dowel drill like this CMT tool is specifically designed for flat-bottomed blind holes - the format required for dowel joints. It uses a precision balanced centre point to register accurately, 2 carbide cutting edges for smooth side walls, and 2 negatively ground spurs to score the hole perimeter cleanly. A standard twist drill produces a pointed-bottom hole and does not score the perimeter, making it unsuitable for production dowel boring in panel materials where clean, flat-bottomed holes and chip-free entries are required.
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.