Product Description
CMT 308.110.12 Dowel Drill - 7/16" x 1-3/16" x 2-17/64" Left-Hand Rotation is a precision carbide-tipped boring tool engineered for clean, flat-bottom blind holes in panel processing and cabinetmaking applications. Built with a hardmetal (HW) cutting edge and negatively ground spurs, this left-hand dowel drill delivers accurate, splinter-free bores in solid wood, chipboard, MDF, HDF, plywood, laminates, and coated panels. With an 11mm cutting diameter, 30mm cutting height, and a 57.5mm total length, it is sized for the short-series boring stations found on multi-spindle CNC boring machines and panel processing centers.
Key Features
- Hardmetal (HW) Carbide Cutting Edge - tungsten carbide material maintains a sharp, durable edge through high-volume production runs, reducing downtime for tool changes and resharpening cycles.
- Negatively Ground Spurs - the precision-sharpened spur geometry scores the material boundary before the main cutters engage, producing clean bore walls and flat-bottom holes with no tearout or rough edges on laminates and coated panels.
- Left-Hand (LH) Rotation - designed specifically for left-hand spindle positions on multi-spindle boring heads, ensuring correct chip evacuation direction and consistent hole quality across the full drilling pattern.
- 2-Spur, 2-Tooth Configuration - dual cutting teeth paired with dual spurs balance cutting forces evenly, contributing to smooth entry and a uniform bore finish in chipboard, MDF, and hardwood.
- 10x20mm Parallel Shank with Driving Flat - the standardized shank dimensions provide secure, repeatable seating in compatible boring machine chucks and adapters, minimizing runout and maintaining hole-position accuracy.
- Short-Series Length (57.5mm Total) - the compact 57.5mm overall length fits the tight spindle spacing of multi-row boring heads, making it a practical choice for cabinet-side and shelf-pin hole patterns.
- 30mm Cutting Height - sufficient cutting depth for standard dowel joint pocket depths, accommodating a wide range of blind-hole boring applications without repositioning the workpiece.
Why This Product
- Purpose-Built for Left-Hand Spindle Stations - many multi-spindle boring heads include dedicated LH spindles for symmetrical hole patterns. This drill is designed expressly for that rotation direction, so chip flow, spur engagement, and bore quality are all optimized for LH operation rather than adapted from a right-hand tool.
- Clean Results on Finished Panel Surfaces - the negatively ground spur design prioritizes surface integrity at the hole entrance, which is critical when boring into pre-laminated or pre-coated panels where tearout at the face is unacceptable.
- Consistent Depth Control for Blind Holes - the 30mm cutting height and flat-bottom geometry make this drill well-suited for dowel joint pockets where precise depth directly affects joint fit and assembly quality.
- Broad Material Compatibility - the HW carbide construction handles the full range of engineered wood panel materials - chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels - making it a versatile tool for mixed-production environments.
Specifications
- Manufacturer Part Number: 308.110.12
- Brand: CMT Orange Tools
- Description: Dowel Drill 7/16" x 1-3/16" x 2-17/64" LH
- Diameter: 11mm (7/16")
- Cutting Height: 30mm (1-3/16")
- Total Length: 57.5mm (2-17/64")
- Shank: 10x20mm
- Number of Spurs: 2
- Number of Teeth: 2
- Sharpening: Negatively ground spurs
- Blade Material: HW (Hardmetal Carbide)
- Rotation: Left-Hand (LH)
- Series: Short Series
Approved Applications
- Blind hole dowel joint boring in cabinet and furniture production
- Chipboard and particleboard panel processing
- MDF and HDF boring
- Hardwood and softwood dowel pocket drilling
- Plywood panel boring
- Laminate and coated panel drilling where surface integrity is required
- Multi-spindle CNC boring machine left-hand spindle stations
- CNC boring centers and panel processing centers
- Boring machines equipped with compatible adapters or chucks
Frequently Asked Questions
What does left-hand (LH) rotation mean, and how do I know if this drill fits my machine?
Left-hand rotation means the spindle turns counter-clockwise when viewed from the tip end. Multi-spindle boring heads use a combination of right-hand and left-hand spindles to allow mirror-image hole patterns on both faces of a panel. Check your machine's spindle layout chart to confirm which positions require LH tooling before ordering. This drill is designed exclusively for LH spindle positions.
What is the shank size, and will it fit a standard boring machine chuck?
The shank measures 10x20mm - a 10mm diameter parallel shank with a 20mm grip length and a driving flat. This is a widely used standard dimension for dowel drills on multi-spindle and CNC boring equipment. Verify that your machine's chuck or collet accepts a 10mm shank before installation.
What is the maximum boring depth this drill can achieve?
The cutting height is 30mm, which represents the usable boring depth. This is the specified cutting height as listed in the product data and defines the deepest blind hole the tool can produce in a single pass without bottoming the shank in the bore.
Can this drill be used on laminated or pre-coated panels without causing surface damage?
Yes. The negatively ground spurs are designed to score the material cleanly at the perimeter of the hole before the main cutting teeth remove the core material. This spur-first action minimizes chipping and tearout at the face of laminates and coated panels, helping preserve the finished surface around the bore entrance.
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.