Alpha
Alpha Onsite+ Step Tip Step Drill — 8–20mm Straight Shank
Part No: 9STM8-20DSD | Barcode: 9313601026579 | Range: Onsite+
The Alpha Onsite+ Step Tip Step Drill in 8–20mm features a unique composite Z-cut design with two cutting edges per step for aggressive metal removal and efficient chip clearance. The patented step tip eliminates the need for pilot holes, reduces wandering, and delivers up to 3x the efficiency and lifespan of standard step drills.
8–20mm
Composite Z-Cut
AlTiN Coated
3x Lifespan
Straight Shank
No Pilot Hole
Suitable For
Stainless Steel
Mild Steel
Wood
Plastic
Key Features & Benefits
- Composite Z-cut technology — two cutting edges per step aggressively remove metal and clear chips for faster, cleaner cuts.
- Patented step tip design — eliminates pilot holes, reduces wandering, and starts drilling instantly with precise centre positioning.
- 3.5mm extended cutting edge — spreads cutting force evenly during high-speed drilling, reducing heat buildup and extending edge life.
- AlTiN coating — extreme temperature resistance for sustained performance in demanding materials like stainless steel.
- 3x efficiency and lifespan — outperforms standard step drills by a factor of three in both cutting speed and total service life.
- Straight shank — fits standard drill chucks and drill presses for secure, slip-free drilling with maximum torque transfer.
When to Use This Step Drill
Choose the 9STM8-20DSD when you need to drill precise, clean holes in the 8–20mm range through steel, stainless steel, or sheet metal. The straight shank design is ideal for drill press work and standard chuck applications where maximum grip and torque transfer are essential.
Authorised Australian Dealer — This product is sourced directly from Alpha Tools Australia and is backed by full Australian manufacturer warranty and local support.
Product Specifications
| Part No. | Type | Size Range | Shank |
|---|---|---|---|
| 9STM4-M12DSD | Step Drill | 3.3–10.2mm | Straight |
| 9STM4-12DSD | Step Drill | 4–12mm | Straight |
| 9STM8-20DSD ★ | Step Drill | 8–20mm | Straight |
| 9STM9-19DSD | Step Drill | 9–19mm | Straight |
| 9STQRM4-12SD | Step Drill SF | 4–12mm | ¼″ Hex |
| 9STQRM4-20SD | Step Drill SF | 4–20mm | ¼″ Hex |
| 9STQRM6-30SD | Step Drill SF | 6–30mm | ¼″ Hex |
| SM3SDTP-B | Thundermax Set | 3pc Set | Mixed |
| SM3STDSD-B | Tuffbox Set | 3pc Set | Straight |
| SM3STQRSD-B | Tuffbox Set | 3pc Set | ¼″ Hex |
★ You are viewing the highlighted variant. Other sizes in this series are also available.
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