Evolution Power Tools
Evolution Power Tools SD-12 step drill 3/16 to 7/8 inch
Straight-flute step drill covers twelve sizes from 3/16 to 7/8 inch in one bit
- Drills multiple hole sizes with one 12-step bit
- Straight flute design clears chips for smoother cuts
- Covers 3/16 to 7/8 inch range in a single tool
- New condition ensures full factory performance from first use
- California Proposition 65 warning informs safe handling practices
Drilling range 3/16 to 7/8 inch
The Evolution Power Tools SD-12 is a straight-flute step drill designed to produce twelve hole sizes in a single bit. It suits electricians, plumbers and sheet-metal fabricators who need to enlarge existing holes or create new ones without changing tools. The stepped profile lets the user stop at the required diameter and move on. It is not intended for deep-hole drilling or for materials thicker than the step height allows.
Stepped cutting under load
Each step engages progressively so the cutting force spreads across multiple edges rather than concentrating on a single point. This reduces the tendency to grab or chatter when the bit reaches a larger diameter in thin-wall steel, aluminium or plastic. The straight flutes evacuate swarf efficiently during continuous use, keeping the cutting faces cooler than a standard twist drill would run in the same application. Heavy feed pressure on the largest step may still cause deflection.
High-speed steel construction and shank
The bit is manufactured from high-speed steel for wear resistance in abrasive alloys and hardened sheet metal. A three-flat shank prevents slipping in a standard drill chuck and allows quick changes in a keyless chuck without tools. Laser-etched diameter markings remain legible after repeated use, so the operator can confirm the target size at a glance. The uncoated surface requires cutting fluid for stainless steel to maximise tool life.
Highlights
- Drills multiple hole sizes with one 12-step bit
- Straight flute design clears chips for smoother cuts
- Covers 3/16 to 7/8 inch range in a single tool
- New condition ensures full factory performance from first use
- California Proposition 65 warning informs safe handling practices
Specifications
| Brand | EVOLUTION POWER TOOLS |
|---|
Questions about this item
Does the Evolution SD-12 step drill generate much heat when used continuously through all 12 steps?
The straight-flute design clears chips efficiently, reducing friction and heat build-up during extended drilling sessions.
What drill chuck size is needed to hold the Evolution SD-12 step drill securely?
A standard 3/8 inch or larger drill chuck is required to grip the shank of the SD-12 step drill.
Will the Evolution SD-12 step drill work with an older corded drill that only runs at a single speed?
Yes, the SD-12 functions with single-speed drills; simply apply steady pressure and let the straight flutes cut at the available RPM.
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