PFERD Step Drills are sturdy high-performance tools for burr-free drilling and deburring of sheet metal, pipes and profiles. Materials up to 4 mm thick can be drilled and deburred easily in a single step. PFERD also offers step drills with a high-quality HICOAT coating. To ensure reliable torque transmission, all step drills have a three-surface shaft.

Set contains 3 HSS Step Drills:

• 1 x STB HSS 04-12/6 - 9 step, 4mm to 12mm
• 1 x STB HSS 04-20/8 - 9 steps, 4mm to 20mm
• 1 x STB HSS 04-30/10 - 14 steps, 4mm to 30mm

Advantages:
- Drilling and deburring in a single step.
- Completely smooth running and a high cutting performance.
- The high-quality drill tip ensures effortless centring and drilling.
- The tool taper makes it easier to pull back from drilled plates.
- Chips which do not break are neatly removed as with a spiral drill.
- Built-up edges and cold welding on the blades are prevented.

Materials that can be worked:
- Steel
- Cast steel
- Stainless steel (INOX)
- Non-ferrous metals
- Plastics

Applications:
- Drilling
- Deburring

Recommendations for use:
- Only use machines that are intended for use with the relevant tool.
- Ensure correct Personal Protective Equipment is worn while using the tool.
- Use HSS step drills on sheets, pipes and profiles with a maximum thickness of 4 mm.
- Use cutting oil/compressed air as a coolant and lubricant in the case of step drills without a coating. (Smoother drilling action and extended service life.)
- Avoid Material Cross Contamination.

Operating Instructions:
- Observe the following specifications and recommended rotational speeds:

Specifications:
1. STB HSS 04-12/6 - Step Drill Bit HSS
Drilling diameter: 4mm to 12mm
Shank diameter: 6mm

• Steel and Cast Steel up to 700 N/mm2: 2 400 (4mm) – 540 (12mm) RPM
• Hard Non Ferrous Metals: 2 400 (4mm) – 540 (12mm) RPM
• Soft Non Ferrous Metals: 2 400 (4mm) – 540 (12mm) RPM
• Plastics and Other Materials: 1 600 (4mm) - 270 (12mm) RPM

2. STB HSS 04-20/8- Step Drill Bit HSS
Drilling diameter: 4mm to 20mm
Shank diameter: 8mm

• Steel and Cast Steel up to 700 N/mm2: 2 400 (4mm) - 320 (20mm) RPM
• Hard Non Ferrous Metals: 2 400 (4mm) - 320 (20mm) RPM
• Soft Non Ferrous Metals: 2 400 (4mm) - 320 (20mm) RPM
• Plastics and Other Materials: 1 600 (4mm) – 160 (20mm) RPM

3. STB HSS 04-30/10 - Step Drill Bit HSS
Drilling diameter: 4mm to 30mm
Shank diameter: 10mm

• Steel and Cast Steel up to 700 N/mm2: 2 400 (4mm) – 200 (30mm) RPM
• Hard Non Ferrous Metals: 2 400 (4mm) – 200 (30mm) RPM
• Soft Non Ferrous Metals: 2 400 (4mm) – 200 (30mm) RPM
• Plastics and Other Materials: 1 600 (4mm) – 100 (30mm) RPM

For further operating instructions or product information, please visit www.pferd.com or any of our social media pages.