Product Description
CMT 311.080.11 Dowel Drill 5/16" x 35 x 70mm RH by CMT is a precision-engineered, right-hand rotation boring tool built for clean, accurate blind hole drilling in panel processing and furniture manufacturing applications. Designed with a 2-flute, long-series configuration and a tungsten carbide (HW) cutting head, this dowel drill delivers flat-bottom holes with crisp bore walls in chipboard, MDF, solid wood, plastics, and laminates. The spiral portion is coated with P.T.F.E. to reduce friction and resist pitch and adhesive buildup, keeping the tool running clean through demanding production cycles. Whether used in a multi-spindle CNC boring machine or a panel boring center with an adapter, this 5/16" dowel drill is sized and balanced for repeatable dowel joinery in cabinet making and furniture assembly lines.
Key Features
- Carbide (HW) cutting head with 2 precision-ground cutting edges - tungsten carbide construction maintains a sharp edge through high-volume boring in abrasive sheet materials like MDF and chipboard, reducing regrind frequency and extending tool life.
- 2 negatively ground spurs (V2 configuration) - the negative grind geometry shears panel fibers cleanly at the perimeter of the hole, producing flat-bottomed blind holes with minimal tearout on coated and laminated panels.
- P.T.F.E. coating on the spiral flutes - the low-friction orange or black coating prevents resin, pitch, and glue from bonding to the flute surfaces, reducing clogging and keeping chip evacuation efficient during continuous boring operations.
- Precision-balanced centre point - the HW centre point registers accurately on the panel surface, preventing walking at the start of the bore and ensuring hole placement consistency for tight-tolerance dowel connections.
- 2-flute spiral design with 35mm cutting height - two spiral flutes in the long-series 70mm body allow for deeper blind hole boring, giving clearance for full-depth dowel insertion without bottoming out the shank.
- Parallel 10x30mm shank with driving flat and length adjusting screw - the driving flat prevents shank rotation in the chuck or collet, while the length adjusting screw enables precise depth setting, critical for consistent dowel depth across multi-spindle setups.
- Super-strength steel body - the high-strength steel shaft absorbs the torsional stresses of production boring while keeping the overall tool weight low for balanced spindle performance.
- Right-hand (RH) rotation - designed for standard right-hand spindle direction, compatible with the majority of CNC boring centers and multi-spindle panel drilling machines.
Why This Product
- Long-series length for full-depth dowel holes - at 70mm overall length with a 35mm cutting height, this drill accommodates deeper blind holes than standard-series dowel drills, making it the right choice when longer dowels or thicker panel stacks require extra boring depth without repositioning the workpiece.
- Optimized for coated and engineered panels - the combination of negatively ground spurs and P.T.F.E.-coated flutes specifically addresses the demands of laminated, coated, and resin-saturated materials where tearout and pitch buildup are the most common causes of poor hole quality and shortened tool life.
- Precision shank for machine-ready installation - the 10x30mm parallel shank with driving flat and adjusting screw is engineered for direct installation into multi-spindle boring heads and CNC boring centers, eliminating adapter fitment concerns and supporting accurate, repeatable depth control across production runs.
- Balanced construction for high-cycle boring accuracy - the precision-balanced centre point and carbide cutting geometry work together to maintain bore position accuracy across large panel batches, reducing cumulative alignment error in dowel-jointed furniture and cabinet carcass production.
Specifications
- Manufacturer Part Number: 311.080.11
- Brand: CMT Orange Tools
- Diameter: 5/16"
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10x30mm parallel shank with driving flat and length adjusting screw
- Number of Flutes: 2
- Number of Spurs: 2
- Spur Grind: Negatively ground spurs
- Blade Material: HW (tungsten carbide)
- Rotation: RH (right-hand)
- Coating: P.T.F.E. on spiral portion (orange or black)
Approved Applications
- Blind hole drilling for dowel joinery connections
- Panel drilling in furniture manufacturing
- Cabinet carcass and case goods production
- Boring in chipboard and particleboard panels
- Boring in MDF and HDF sheet materials
- Drilling in solid hardwood and softwood
- Boring in plywood and coated panels
- Drilling in plastics and laminates
- Multi-spindle CNC boring machine operations
- CNC boring center and panel processing center use
- Boring machine use with adapter or chuck
Frequently Asked Questions
What is the difference between this long-series dowel drill and a standard-series dowel drill?
This drill has a 70mm total length with a 35mm cutting height, which is the long-series configuration. This allows it to bore deeper blind holes than shorter-series dowel drills, making it suitable for applications where longer dowels or deeper hole depths are required without repositioning the workpiece or tool.
What does the P.T.F.E. coating on the spiral do?
The P.T.F.E. coating applied to the spiral portion of the drill creates a low-friction surface that resists adhesion of pitch, resin, and glue. This reduces material buildup in the flutes during boring, keeps chip evacuation efficient, and helps maintain cutting performance over extended use in resin-rich or adhesive-coated panel materials.
What does "negatively ground spurs" mean and why does it matter?
Negatively ground spurs are sharpened with a geometry that causes the spur to shear panel fibers inward at the perimeter of the bore rather than pushing them outward. This produces cleaner hole edges with less tearout, which is especially important when drilling coated, laminated, or veneered panels where surface quality at the bore mouth is critical for finished furniture and cabinet assembly.
What machines is the 10x30mm parallel shank compatible with?
The 10x30mm parallel shank with driving flat and length adjusting screw is designed for use in multi-spindle CNC boring machines, CNC boring centers, and panel processing centers. It can also be used in boring machines fitted with an appropriate adapter or chuck that accepts a 10mm parallel shank with driving flat.
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.