Product Description
The CMT 515.001.51 Steel Step Drill Bit with 3/8 in. Right-Hand Rotation is a high-speed steel (HSS) boring tool engineered for the CMT Pocket-Pro joinery system as a precision spare part. Designed to drill through wood, sheet metal, plastic, and similar materials in a single step-down operation, this step drill bit eliminates the time-consuming process of swapping between multiple bits when working through varying hole diameters. With a 55mm cutting height and a generous 178mm total length, it reaches into workpieces where shorter bits fall short - making it a practical choice for pocket-hole joinery work, sheet metal fabrication, and general-purpose step drilling tasks.
Key Features
- High-Speed Steel (HSS) construction - delivers the hardness and heat resistance needed to cut cleanly through metal, wood, and plastic without premature dulling during repeated use.
- Step drill geometry - allows multiple hole diameters to be bored in a single plunge, reducing tool changes and speeding up work on sheet metal and thin-stock applications.
- 3/8 in. diameter with 4.3mm small-step diameter - provides a defined size progression that creates clean, burr-minimized entry points across the full cutting range.
- 55mm cutting height - gives the bit enough usable cutting length to work through thicker material stacks or layered assemblies without bottoming out the shank.
- 178mm total length - extends reach for use in drill presses and hand drills where depth clearance is a factor, keeping the chuck away from the workpiece surface.
- Right-hand (RH) rotation - compatible with standard drill chucks and drill presses, requiring no special tooling or adapters for everyday use.
- CMT Pocket-Pro joinery system compatibility - functions as a direct spare part replacement, restoring the pocket-hole system to full operation without guesswork or improvised substitutions.
Why This Product
- Pocket-Pro system owners can source this bit as an exact OEM spare part - preserving the precision alignment and fit that the joinery system was designed around, rather than settling for a generic substitute that may alter hole placement or depth.
- The step drill design means a single bit handles both the pilot and the stepped bore in one motion, cutting down on setup time when drilling sheet metal, thin wood panels, or plastic sheet stock.
- High-speed steel construction means the bit holds a usable edge through demanding repetitive drilling sessions, making it a dependable choice for production joinery work or high-volume sheet metal applications.
- At 178mm total length and right-hand rotation, this bit works directly with standard hand drills and drill presses without modification - getting a replacement into service quickly after a worn bit is retired.
Specifications
- Brand: CMT Orange Tools
- Order Number: 515.001.51
- Description: STEP DRILL BIT 3/8 in. RH
- Diameter: 3/8 in.
- Small Diameter: 4.3mm
- Cutting Height: 55mm
- Total Length: 178mm
- Rotation: Right-Hand (RH)
- Material: High-Speed Steel (HS)
Approved Applications
- Pocket-Pro joinery system step drilling - replacement spare part use
- Sheet metal drilling
- Wood drilling
- Plastic drilling
- Multi-diameter step drilling in a single operation
Frequently Asked Questions
What joinery system is the CMT 515.001.51 designed to work with?
This step drill bit is listed as a spare part for the CMT Pocket-Pro joinery system. It is the correct replacement bit when the original drill requires servicing or replacement within that system.
What is the difference between the large and small diameters on this bit?
The bit has a 3/8 in. (large step) diameter and a 4.3mm small diameter. The stepped profile allows the bit to bore both the pilot hole and the larger stepped diameter in a single drilling pass, without repositioning or changing bits.
Is this bit compatible with a standard drill press or hand drill?
Yes. The right-hand (RH) rotation of this bit is compatible with standard drill chucks used in both hand drills and drill presses. No special adapters or non-standard tooling are required.
What materials can this step drill bit cut through?
The high-speed steel (HSS) construction makes this bit suitable for drilling wood, sheet metal, plastic, and similar workpiece materials commonly encountered in joinery and fabrication work.
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