Product Description
The CMT Hinge Boring Bit 32 x 57.5mm RH is a precision-engineered carbide-tipped boring tool designed for drilling flat-bottom hinge cup holes in cabinet doors and face frames. Built around a tungsten carbide (HW) cutting head and a super-strength steel body with a PTFE-coated cutter portion, this right-hand rotation bit delivers clean, accurate 32mm bores required for European-style concealed hinge installation. With a parallel shank featuring a driving flat and length adjusting screw, it is compatible with boring machines equipped with adaptors or chucks, making it a reliable choice for cabinetry production and panel processing applications.
Key Features
- HW (Tungsten Carbide) Cutting Head with Precision Balanced Centre Point - ensures accurate entry on each bore and reduces walkout, producing consistently positioned hinge cup holes even in repeated production runs.
- 2 Precision Ground HW Cutting Edges (Z2) - dual carbide cutting edges deliver a flat-bottom bore geometry essential for European concealed hinge seating, leaving a clean, finished hole without secondary cleanup.
- 2 Negatively Ground Spurs (V2) - the negative grind geometry scores the material perimeter before the main cutters engage, preventing tearout and producing clean bore walls in solid hardwood, chipboard, MDF, and plywood.
- PTFE-Coated Cutter Portion - the orange or black PTFE coating on the cutter resists pitch and adhesive buildup, reducing friction and extending service life during high-volume hinge boring operations.
- Super-Strength Steel Body - the robust steel construction handles the lateral stresses of production boring without deflection, maintaining dimensional accuracy across the full 57.5mm tool length.
- Parallel Shank with Driving Flat and Length Adjusting Screw - the 10 x 26mm shank seats securely in machine adaptors or chucks, and the length adjusting screw allows precise depth setting for consistent hinge cup depth across all bored holes.
- Right-Hand (RH) Rotation - matches the standard spindle direction of multi-spindle CNC boring machines and drill presses, ensuring compatibility with the widest range of production and benchtop equipment.
Why This Product
- The 32mm diameter and flat-bottom bore geometry meet the exact requirements for European concealed hinge cup installation - eliminating the need for secondary operations or fitting adjustments.
- The combination of negatively ground spurs and precision-ground carbide cutting edges produces clean entry and exit points in composite panel materials such as MDF and chipboard, where tearout is a common challenge with lower-grade bits.
- The PTFE coating on the cutter portion actively resists resin and glue accumulation during prolonged boring sessions, helping maintain cutting performance without frequent cleaning interruptions.
- The parallel shank with driving flat and length adjusting screw provides repeatable depth control across production runs - critical for cabinetmakers who need uniform hinge cup depth on every door panel.
Specifications
- Manufacturer Part Number: 317.320.11
- Brand: CMT Orange Tools
- Product Type: Hinge Boring Bit
- Diameter: 32mm
- Total Length: 57.5mm
- Shank: 10 x 26mm
- Rotation: Right-Hand (RH)
- Number of Cutting Edges: 2
- Number of Spurs: 2
- Spur Geometry: Negatively ground spurs
- Material: HW (Tungsten Carbide)
Approved Applications
- Drilling flat-bottom hinge cup holes for European concealed hinge installation
- Cabinet door hinge mortising and hinge cup boring
- Face frame hinge mounting preparation
- Panel processing on boring machines equipped with adaptors or chucks
- Production boring in solid hardwood, softwood, chipboard, MDF, and plywood
Frequently Asked Questions
What shank size does this hinge boring bit use, and what machines is it compatible with?
This bit uses a 10 x 26mm parallel shank with a driving flat and length adjusting screw. It is designed for boring machines equipped with adaptors or chucks, including multi-spindle CNC boring machines and boring centers with compatible chuck or adaptor systems.
Why does this bit use negatively ground spurs instead of standard spurs?
Negatively ground spurs score the material at the perimeter of the bore before the main cutting edges engage. This approach severs the surface fibers cleanly prior to chip removal, which significantly reduces tearout and produces cleaner bore walls - particularly important when working with chipboard, MDF, and veneered panels where surface quality matters.
What is the purpose of the PTFE coating on the cutter portion?
The orange or black PTFE coating applied to the cutter portion prevents pitch, resin, and adhesive from bonding to the tool surface during boring operations. This reduces friction buildup, keeps the cutting edges performing consistently, and extends the service life of the bit in production environments.
Is there a left-hand rotation version of this bit available in the CMT 317 series?
This specific model, the 317.320.11, is a right-hand (RH) rotation bit. CMT offers hinge boring bits in both right-hand and left-hand rotation configurations within the 317 series to match the spindle direction requirements of different machine setups - consult the full CMT 317 series lineup for the corresponding left-hand model.
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.