Product Description
CMT Hinge Boring Bit 20 x 57.5mm Right-Hand by CMT is a precision-engineered brad-point boring bit designed specifically for drilling flat-bottom hinge cup holes in cabinet doors, face frames, and panel components. Built for use on boring machines equipped with adaptors or chucks, this 20mm diameter bit delivers the clean, flat-bottomed bores required for European-style concealed hinge installation. Its tungsten carbide (HW) head, PTFE-coated cutter body, and negatively ground spurs make it a reliable choice for cabinetmakers and woodworking shops processing hardwood, MDF, chipboard, and plywood.
Key Features
- HW (Tungsten Carbide) Head with Precision Balanced Centre Point - the carbide tip stays sharp through high-volume boring cycles, maintaining accurate hole placement and reducing repositioning errors on production runs.
- 2 HW Precision Ground Cutting Edges (Z2) - dual carbide cutting edges provide balanced cutting forces that reduce vibration and produce consistently flat-bottomed hinge cup bores with minimal tearout.
- 2 Negatively Ground Spurs (V2) - the negative grind geometry scores the wood fibers ahead of the cutters, creating clean bore walls and crisp entry edges that require little to no sanding before hinge installation.
- PTFE Coating on Cutter Portion - the orange or black P.T.F.E. coating prevents pitch and glue buildup on the bit body, reducing friction and extending tool life between sharpenings.
- Super-Strength Steel Body - the rigid steel construction resists deflection under load, supporting the carbide head and keeping bores true to the intended 20mm diameter.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 26mm shank locks securely in adaptors or chucks and allows fine depth adjustment so each hinge cup is bored to a consistent depth across every panel.
- Right-Hand (RH) Rotation - compatible with standard right-hand spindle boring machines, CNC boring centers, and drill presses, making it straightforward to integrate into existing shop setups.
Why This Product
- The flat-bottom bore geometry produced by the precision carbide head and negatively ground spurs is the exact profile required for European concealed hinges - eliminating the rework that results from using general-purpose twist bits or forstner bits on hinge cup applications.
- The 10 x 26mm parallel shank with driving flat and length adjusting screw allows the bit to seat securely in boring machine adaptors or chucks, giving shops working on multi-spindle CNC boring centers or drill presses a single, versatile mount option.
- The P.T.F.E. coating on the cutter portion actively resists pitch and adhesive residue buildup, keeping the bit running efficiently through production runs on materials like MDF, chipboard, and glue-laminated panels without frequent cleaning stops.
- At 20mm diameter and 57.5mm total length, this bit matches the standard hinge cup dimensions used across European cabinet hardware systems, supporting direct drop-in compatibility with 35mm concealed hinges commonly used in cabinet door and face frame applications.
Specifications
- Manufacturer Part Number: 317.200.11
- Brand: CMT Orange Tools
- Diameter: 20mm
- Total Length: 57.5mm
- Shank: 10 x 26mm
- Rotation: Right-hand (RH)
- Number of Spurs: 2
- Number of Teeth: 2
- Spur Geometry: Negatively ground spurs
- Head Material: HW (Tungsten Carbide)
- Cutter Coating: Orange or black P.T.F.E.
- Shank Feature: Parallel shank with driving flat and length adjusting screw
- Product Type: Hinge Boring Bit
Approved Applications
- Drilling flat-bottom hinge cup holes for European-style concealed hinge installation
- Cabinet door hinge cup boring
- Face frame hinge mounting bores
- Panel processing on multi-spindle CNC boring machines and boring centers
- Use on boring machines equipped with adaptors or chucks
Frequently Asked Questions
What machines is this hinge boring bit compatible with?
This bit is designed for boring machines equipped with adaptors or chucks. The 10 x 26mm parallel shank with driving flat makes it compatible with multi-spindle CNC boring machines, CNC boring centers, panel processing centers, and drill presses that accept this shank size and style.
Why are negatively ground spurs important for hinge cup boring?
The 2 negatively ground spurs score wood fibers at the perimeter of the hole before the main cutters remove material. This shearing action prevents splintering and tearout at the bore edge, which is critical when boring into finished cabinet door faces where a clean entry is visible after hinge installation.
What is the purpose of the P.T.F.E. coating on the cutter portion?
The orange or black P.T.F.E. coating on the cutter portion prevents pitch and glue from adhering to the bit body during use. This reduces friction and keeps the bit running cleanly through high-volume production work on materials like MDF, chipboard, and wood composites that tend to release adhesives under heat.
What does the length adjusting screw on the shank do?
The length adjusting screw, part of the parallel shank design, allows the operator to fine-tune the boring depth so that every hinge cup is bored to a consistent depth across all panels. This is especially useful when running matched sets of cabinet doors where uniform hinge cup depth is required for proper hinge alignment and door swing.
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.