Key Features
- 15-step range: 6 to 42 mm — replaces multiple twist drills
- Heat-treated alloy steel construction for superior hardness and durability
- Precision-ground cutting edges for clean, burr-free holes
- Clear diameter markings on each step for quick size identification
- Works on steel, stainless steel, plastic, and wood
- Max drilling depth of 3 mm per step — ideal for thin materials
- Reduces tool changes and increases efficiency on the job
Technical Specifications
| Specification | Details |
|---|---|
| Model | ST-4 |
| Size Range | 6, 9, 12, 15, 18, 21, 24, 27, 30, 32, 34, 36, 38, 40, 42 mm |
| Max Hole Depth | 3 mm |
| Material | Heat Treated Alloy Steel |
| Type | Step Drill |
| Applicable Materials | Steel, Stainless Steel, Plastic, Wood |
Frequently Asked Questions
What materials can the Step Drill ST-4 cut?
The ST-4 is suitable for steel, stainless steel, plastic, and wood. It is not recommended for hardened steel or concrete.
How do I use the step drill without damaging the material?
Start with the smallest step and apply steady pressure. Use cutting oil for metal to reduce heat and extend tool life. Ensure the drill is perpendicular to the surface.
Can this step drill be used on curved surfaces?
Yes, but care is needed to maintain a stable angle. For curved surfaces, it is best to start with a pilot hole and use a slower speed.
Is the ST-4 covered by a warranty?
All-K Marine offers a standard warranty against manufacturing defects. Contact our support team for details.
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