Key Features
- 12 hole sizes in one tool: 6, 9, 11, 13, 15, 17, 19, 21, 24, 27, 30, 33 mm
- Heat-treated alloy steel construction for long life
- Works on steel, stainless steel, plastic, and wood
- Step markings for precise depth control
- Reduces tool changes and increases productivity
- Max hole depth per step: 3 mm
Technical Specifications
| Specification | Detail |
|---|---|
| Model | ST-3 |
| Size Range | 6, 9, 11, 13, 15, 17, 19, 21, 24, 27, 30, 33 mm |
| Max Hole Depth | 3 mm |
| Material | Heat Treated Alloy Steel |
| Type | Step Drill |
| Applicable Materials | Steel, Stainless Steel, Plastic, Wood |
| IMPA Code | 633803 |
Frequently Asked Questions
What materials can the ST-3 step drill cut?
It cuts steel, stainless steel, plastic, and wood. For stainless steel, use lower RPM and cutting fluid.
What is the maximum hole depth per step?
3 mm per step. For deeper holes, use a standard drill bit.
Is the ST-3 suitable for marine use?
Yes, it is commonly used in shipbuilding and repair for drilling holes in metal panels and fittings.
How do I read the size markings?
Each step is clearly engraved with its diameter in mm, allowing you to drill to the exact size needed.
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