Multi‑edge sheet‑metal drills are mainly used for drilling steel components. 

They deliver noticeably better drilling performance than conventional two‑flute twist drills, featuring high drilling efficiency and smooth, effortless cutting.

For manufacturers producing HSS sheet‑metal drills, processing efficiency is a key concern.

Our company manufactures CBN composite bonded wheels for the production and processing of HSS sheet‑metal drills. 

The processing data are as follows:

Equipment: Customer‑built 5‑axis grinding machine, spindle power: 20 kW

Wheel specification: 1A1 100×20×10×8 for angle dressing, KAIIB107‑A‑23

Cooling: Oil cooling

Workpiece dimension: Φ32×30 flute length × 8‑flute sheet‑metal drill, helix angle 35°

Workpiece material: M2

Grinding parameters: Wheel peripheral speed: 26.5 m/s, depth of cut: 2‑2.2 mm, feed rate: 280 mm/min

Cycle time: 25 seconds per flute

Wheel dressing frequency: Dressing required after approx. 360 pieces