The Sthor 22617 step drill set is engineered for precision drilling in stainless steel, structural steel, cold rolled steel, non-ferrous metals, steel sheets, and plastic.
Each drill is made of HSS 4241 steel with a titanium nitride coating, which increases tool life, improves heat dissipation, and ensures clean, burr-free holes. The drills feature automatic centering on rounded and slippery surfaces, preventing walking, and are graded every 2–3 mm for versatility.
This set includes 4 step drills covering diameters from 4 mm to 39 mm, making it suitable for a wide range of applications.
TECHNICAL DETAILS:
| Specification | Details |
| Brand | Sthor |
| Model | 22617 |
| Series | GRD |
| Product Type | Step Drill Set |
| Diameters | 4–12 mm (steps: 4, 6, 8, 10, 12 mm); 4–20 mm (steps: 4, 6, 8, 10, 12, 14, 16, 18, 20 mm); 4–32 mm (steps: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32 mm); 4–39 mm (steps: 4, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39 mm) |
| Rung Quantity | 15 |
| Max Cutting Capacity | 4 mm |
| Toolholder Type | Triangle |
| Material | HSS 4241 |
| Surface Finish | Titanium Nitride Coated |
| Application | Stainless steel, structural steel, cold rolled steel, non-ferrous metals, steel sheets, plastic |
| Hole Quality | Clean edges, burr-free, automatic centering, fast heat dissipation |
| Number of Pieces | 4 |
| Pack Quantity | 1 |
| Is it a Set | Yes (4 drills) |
| CE Mark | No |
| Packaging | PE Bag |
| Entity Responsible (EU) | TOYA S.A. |
EN 
FR