Product Description
The CMT Four Flute Dowel Drill - 5/16" x 65 x 105mm Left-Hand is a premium carbide-tipped boring tool engineered for deep blind hole drilling in furniture manufacturing, cabinet making, and panel processing applications. Built on a super-strength steel body with a tungsten carbide (HW) head, this extra-long left-hand rotation drill delivers consistent, flat-bottom bores in chipboard, MDF, hardwood, softwood, laminates, and coated panels. The four spiral flutes and PTFE-coated cutter portion make it a reliable choice for high-volume CNC boring centers and multi-spindle panel processing equipment where precision and tool longevity are essential.
Key Features
- HW (Tungsten Carbide) Cutting Head on Super-Strength Steel Body - delivers long-lasting cutting performance and resistance to wear even in abrasive engineered wood materials like MDF and chipboard.
- PTFE Coating on the Cutter Portion - the black or orange PTFE screw coating prevents pitch and adhesive buildup in the flutes, reducing cleaning time and extending tool life between sharpenings.
- 2 Precision-Ground Cutting Edges (Z2) - hardened carbide cutting edges provide consistently clean bore walls and flat-bottom holes across repeated production cycles.
- 2 Negatively Ground Spurs (V2) - negatively ground spurs score the material cleanly ahead of the cutting edges, eliminating tearout and producing smooth, splinter-free hole entry points in laminates and coated panels.
- Precision Balanced Centre Point - promotes accurate hole placement and reduces wandering during plunge, which is critical when drilling tight-tolerance dowel connection patterns on CNC boring centers.
- 4 Spiral Flutes - effective chip evacuation from four flutes keeps the bore clear during deep drilling, reducing heat buildup and improving hole quality in blind-hole applications.
- 10x30mm Parallel Shank with Driving Flat and Length Adjusting - the driving flat resists torque-induced slippage in the chuck, and the length-adjusting feature allows precise depth setting on multi-spindle machines.
- Left-Hand (LH) Rotation - matches the spindle orientation of left-hand boring units on CNC machining centers and panel processing lines, ensuring the tool cuts correctly rather than pulling out of the workpiece.
- 65mm Cutting Height in a 105mm Total Length Extra-Long Format - the extended reach allows deep blind holes without repositioning the workpiece, supporting efficient single-pass dowel boring on thick panel stock.
Why This Product
- For CNC boring centers and multi-spindle panel processing machines equipped with left-hand spindle positions, this LH-rotation drill fits directly into the machine's left-hand boring units - no adapters or workarounds needed for proper cutting direction.
- The combination of negatively ground spurs and a precision-balanced carbide centre point means blind holes are dimensionally accurate and surface-clean on entry, which is critical for tight-fitting dowel connections in furniture assembly and cabinet construction.
- At 105mm overall length with a 65mm cutting depth, this drill reaches deep blind holes in a single pass - reducing cycle time on panel lines where repositioning or multi-pass operations would slow throughput.
- The PTFE coating on the spiral cutter portion addresses one of the most common maintenance issues in production boring - pitch and glue adhesion - helping maintain cutting efficiency and reducing unplanned tool downtime.
Specifications
- Manufacturer Part Number: 372.080.12
- Brand: CMT Orange Tools
- Diameter: 5/16"
- Cutting Height: 65mm
- Total Length: 105mm
- Shank: 10x30mm
- Number of Flutes: 4
- Number of Cutting Edges: 2 (Z2)
- Number of Spurs: 2 (V2)
- Spur Grind: Negatively ground spurs
- Blade Material: HW (Tungsten Carbide)
- Rotation: Left-Hand (LH)
- Shank Style: Parallel shank with driving flat and length adjusting
Approved Applications
- Drilling blind holes for dowel connections in furniture and cabinet assembly
- Panel drilling on CNC boring centers and multi-spindle boring machines
- Boring in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
- Left-hand spindle positions on large CNC boring centers and panel processing centers
- Boring machines with adapter or chuck compatibility
Frequently Asked Questions
Why does this dowel drill use left-hand (LH) rotation?
CNC boring centers and multi-spindle panel processing machines often have dedicated left-hand spindle positions that rotate counter-clockwise. A left-hand rotation drill is required in those positions so the cutting edges engage the material correctly. Using a right-hand drill in a left-hand spindle would cause the tool to rub rather than cut, resulting in poor hole quality and rapid tool wear.
What is the purpose of the negatively ground spurs on this drill?
The 2 negatively ground spurs score the surface of the workpiece just ahead of the main cutting edges. This pre-scores the material fiber before the body of the drill removes material, which prevents tearout and produces a clean, smooth entry point - particularly important when drilling laminates, coated panels, and veneered surfaces where surface quality is critical.
What does the PTFE coating on the cutter portion do?
The black or orange PTFE coating applied to the spiral cutter portion reduces friction between the tool surface and the workpiece material. In production environments where adhesives and resins are present - such as when drilling MDF, chipboard, or laminates - this coating helps prevent pitch and glue from bonding to the tool, keeping the flutes clear and maintaining cutting efficiency over longer production runs.
What is the function of the driving flat on the 10x30mm parallel shank?
The driving flat is a machined flat surface ground into the parallel shank. When the drill is mounted in a boring unit or chuck, a set screw or clamping mechanism bears against this flat to resist rotational slippage under torque. This ensures the drill stays securely locked in the correct angular position during operation, which is especially important on high-cycle CNC boring equipment. The length-adjusting feature on the shank also allows the operator to fine-tune the drill's depth projection within the boring unit.
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.