Product Description
CMT Dowel Drill for Through Holes - 7 x 35 x 70mm, Right-Hand Rotation by CMT is a precision-engineered, 2-flute carbide-tipped boring tool designed specifically for drilling clean through holes in panel materials used in furniture manufacturing, cabinet assembly, and dowel joinery. With a 7mm cutting diameter, a 35mm cutting height, and a 70mm overall length, this right-hand drill is sized for through-hole boring in panels up to the capacity of the cutting edge, delivering accurate, splinter-free entry and exit in chipboard, MDF, hardwood, softwood, plywood, laminates, and coated panels. The parallel shank with driving flat and length-adjusting screw ensures secure, repeatable seating in multi-spindle CNC boring machines, boring centers, and panel processing equipment.
Key Features
- HW (tungsten carbide) cutting head with precision-balanced centre point - stays on target from the moment contact is made, producing accurately positioned holes with no walking or drift, which is critical for dowel alignment in panel assembly.
- 2 precision-ground cutting edges (Z2) with 2 spiral flutes - dual cutting geometry shears material cleanly on both walls of the bore, reducing tearout and delivering smooth, tight-tolerance holes that accept dowels with minimal fitting.
- Spiral portion coated with orange or black P.T.F.E. (polytetrafluoroethylene) - the low-friction coating prevents pitch, resin, and adhesive buildup on the flutes, keeping chip evacuation efficient and extending tool service life between sharpenings.
- Super-strength steel body construction - provides the structural rigidity needed to withstand the high repetition cycle counts of production boring operations without deflection or premature fatigue.
- Parallel shank (10 x 26mm) with driving flat and length-adjusting screw - ensures positive drive engagement and allows precise depth setting in multi-spindle heads, reducing setup time and maintaining consistent hole depth across a full boring run.
- Right-hand (RH) rotation - matched to standard CNC boring spindle configurations, allowing direct drop-in replacement on compatible machines without special adapters.
- Designed for through-hole applications with 60 deg. sharpening geometry - the point geometry is optimized for clean exit on the back face of the panel, eliminating blowout that would compromise visible surfaces in finished furniture.
Why This Product
- Built for high-volume panel boring - the P.T.F.E.-coated spiral and carbide head combination handles the repetitive cycling of production CNC boring centers and multi-spindle machines, maintaining cut quality over long runs without constant tool changes.
- Precision dowel alignment starts with a precise hole - the balanced centre point and 2 precision-ground cutting edges hold the 7mm diameter to tight tolerances, so dowels seat correctly and panel joints assemble square the first time.
- Versatile material compatibility - one drill handles chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels, reducing the need to swap tooling between different panel types on the same job.
- Consistent depth control through the adjusting screw - the length-adjusting screw on the parallel shank lets operators dial in exact protrusion depth in the spindle chuck, eliminating guesswork and keeping all holes uniform across a production batch.
Specifications
- Manufacturer Part Number: 314.070.11
- Brand: CMT Orange Tools
- Diameter: 7mm
- Cutting Height: 35mm
- Total Length: 70mm
- Shank: 10 x 26mm (parallel shank with driving flat and length-adjusting screw)
- Number of Cutting Edges: 2
- Rotation: Right-Hand (RH)
- Blade Material: HW (tungsten carbide)
- Sharpening: Through holes 60
- Tool Class: BBDD
Approved Applications
- Through-hole drilling for dowel connections in panel assembly
- Furniture manufacturing and cabinet production
- Panel processing on CNC boring centers and multi-spindle boring machines
- Boring in chipboard, MDF, HDF, hardwood, softwood, plywood, laminates, and coated panels
Frequently Asked Questions
What is the difference between a through-hole dowel drill and a blind-hole dowel drill?
A through-hole dowel drill - like this 7 x 35 x 70mm CMT bit - is designed with a geometry optimized to exit the back face of the panel cleanly without blowout or tearout. The 60 deg. sharpening angle and precision-balanced centre point allow the cutting edges to complete the bore through the full panel thickness while keeping both the entry and exit surfaces clean. A blind-hole drill, by contrast, is engineered to stop at a precise depth without breaking through, and uses a flat-bottom geometry instead.
What machines is this drill compatible with?
This dowel drill is designed for use in multi-spindle CNC boring machines, CNC boring centers, and panel processing centers that accept a 10 x 26mm parallel shank with driving flat. The driving flat provides positive rotational engagement, and the length-adjusting screw allows fine-tuning of the drill protrusion depth within the spindle chuck. It can also be used in a boring machine fitted with a suitable adapter or chuck that accepts the 10 x 26mm shank size.
What does the P.T.F.E. coating on the spiral flutes do?
The P.T.F.E. (polytetrafluoroethylene) coating applied to the spiral portion of the drill acts as a low-friction barrier that prevents pitch, resin, and adhesive from bonding to the flute surfaces during cutting. This keeps chips moving freely out of the bore, reduces heat buildup, and extends the interval between sharpenings - which is especially valuable in production environments where the drill is running continuously through MDF, chipboard, laminates, and coated panels that can deposit adhesive residue on tooling.
How many times can this drill be resharpened?
CMT identifies this drill as compatible with through-hole sharpening at a 60 deg. angle. The HW (tungsten carbide) cutting head is precision-ground and can be resharpened when the cutting edges begin to dull, extending the overall service life of the tool. The number of sharpenings will depend on the materials being bored, the spindle speed, feed rate, and the volume of production cycles the drill experiences between services.
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