Product Description
The CMT Hinge Boring Bit 38 x 57.5mm RH is a precision tungsten carbide-tipped boring bit engineered for drilling flat-bottom hinge cup holes in cabinet doors, face frames, and panel components. Designed for use with boring machines equipped with adaptors or chucks, this right-hand rotation bit delivers the clean, accurate bore geometry required for European-style concealed hinge installation. With a 38mm cutting diameter, a 10x26mm parallel shank with driving flat and length adjusting screw, and a total length of 57.5mm, it is built for consistent, repeatable performance in cabinet and furniture manufacturing environments.
Key Features
- Tungsten Carbide (HW) Cutting Head with Precision-Balanced Centre Point - the carbide construction resists wear and maintains sharpness through extended production runs, while the balanced centre point ensures the bit starts cleanly and accurately without wandering.
- 2 Precision-Ground HW Cutting Edges (Z2) - dual carbide cutting edges produce a flat-bottom bore with smooth side walls, meeting the exact geometry required for European concealed hinge cups.
- 2 Negatively Ground Spurs (V2) - negatively set spurs score the workpiece surface cleanly before the cutters engage, minimizing tearout and chip-out on cabinet doors and veneered panels.
- Super-Strength Steel Body with PTFE Coating - the cutter portion is coated with orange or black P.T.F.E., which prevents pitch and resin buildup during boring operations, reducing cleaning downtime and prolonging tool service life.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10x26mm parallel shank with driving flat provides secure, slip-free seating in adaptors or chucks, and the length adjusting screw allows precise depth setting for consistent hinge cup depth across every workpiece.
- Right-Hand (RH) Rotation - matched to standard boring machine spindle direction, ensuring compatibility with conventional multi-spindle and CNC boring equipment without special setup.
Why This Product
- Flat-bottom bore geometry purpose-built for concealed hinges - the combination of a balanced carbide centre point, dual cutting edges, and negatively ground spurs produces the precise flat-bottom cup profile that European-style concealed hinges require for a flush, functional fit.
- PTFE coating extends tool life in high-volume production - the P.T.F.E. coating on the cutter portion actively resists pitch and adhesive buildup when boring chipboard, MDF, and wood composites, reducing mid-run cleanings and keeping cycle times consistent.
- Depth-adjustable parallel shank for repeatable hinge cup depth - the length adjusting screw and driving flat let operators dial in exact boring depth once and hold it across an entire production batch, reducing rejects and rework on cabinet door lines.
- Compatible with a wide range of boring equipment - the parallel shank design works with boring machines equipped with adaptors or chucks, making this bit a flexible choice for both dedicated hinge boring machines and multi-purpose boring centers.
Specifications
- Manufacturer Part Number: 317.380.11
- Brand: CMT Orange Tools
- Diameter: 38mm
- Total Length: 57.5mm
- Shank: 10x26mm
- Rotation: RH (Right-Hand)
- Number of Teeth: 2
- Spurs: 2
- Sharpening Geometry: Negatively ground spurs
- Material: HW (Tungsten Carbide)
Approved Applications
- Drilling flat-bottom hinge cup holes in cabinet doors and face frames
- European concealed hinge installation
- Cabinet door hinge mounting in solid hardwood, softwood, chipboard, MDF, and plywood
- Panel processing and furniture component boring
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 10x26mm parallel shank with driving flat is compatible with a wide range of dedicated hinge boring machines, multi-spindle CNC boring machines, and boring centers that accept this shank configuration.
Why does a hinge boring bit need a flat-bottom geometry?
European-style concealed hinges require a flat-bottom cup hole for the hinge cup to seat flush and function correctly. The combination of a precision-balanced centre point, 2 carbide cutting edges, and 2 negatively ground spurs in this bit produces the clean flat-bottom bore and smooth side walls that this hinge style demands.
What does the PTFE coating on the cutter do?
The P.T.F.E. coating applied to the cutter portion prevents pitch, resin, and glue from adhering to the bit during boring. This is particularly beneficial when working with chipboard, MDF, and other engineered wood panels that tend to release adhesive resins, as it reduces buildup and extends the time between cleanings.
Can the boring depth be adjusted on this bit?
Yes. The parallel shank includes both a driving flat and a length adjusting screw, allowing operators to set precise boring depth. This is essential in production cabinet making where consistent hinge cup depth must be maintained across large batches of doors.
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.