The thread grinding process for high-speed steel taps involves two methods: single-rib grinding and multi-rib grinding. 

We have compiled the dressing and grinding parameters for multi-rib grinding as a reference for high-speed steel tap manufacturers.

CBN grinding wheel dressing parameters are as follows:

Equipment: Jiantao fully automatic CNC thread grinding machine (SM-150)

Dressing wheel: 1A1 70 profile dressing roller

CBN grinding wheel: 3A1 350x203x10x10, 280#, C100

Dressing parameters: CBN wheel speed 1200 rpm; dressing roller speed 5200 rpm; infeed increment 0.2 µm; infeed rate 0.01 mm per 60 seconds; total dressing time approximately 2–3 hours.

CBN grinding wheel parameters are as follows:

Equipment: Jiantao fully automatic CNC thread grinding machine (SM-150)

Spindle power: 7.5 kW

Grinding wheel specifications: 3A1 350×203×10×10 D64 C100

Cooling method: Oil cooling

Workpiece dimensions: M6 × 18mm (flute length) × 3-flute spiral tap; pitch 1.0 mm; flute depth 0.63 mm

Workpiece material: Heye M35

Grinding wheel speed: 1600 rpm (29 m/s)

Grinding depth: 0.63 mm (completed in a single pass)

Feed rate: Setting value 10

Thread grinding time: 70 seconds per piece

Dressing frequency: Once every 200 pieces; dressing depth 0.01 mm