Application Case of Multi-flute Grinding CBN Wheel for HSS Taps

Grinding flutes on high-speed steel taps is divided into single-flute grinding and multi-flute grinding. We have compiled the dressing parameters and grinding parameters for multi-flute grinding, for reference by HSS tap manufacturers.

1. Dressing Parameters for CBN Grinding Wheel

• Equipment: Fully Automatic CNC Thread Grinding Machine SM-150
• Dressing Roller: Forming roller, Model 1A1, Outer Diameter 70
• CBN Grinding Wheel: 3A1 350×203×10×10, Grit Size 280#, Grade C100
• Dressing Settings:
  Rotational speed of CBN wheel: 1200 RPM
  Rotational speed of dressing roller: 5200 RPM
  Single infeed depth: 0.2 μm
  Total infeed per 60 seconds: 0.01 mm
  Total dressing duration: approximately 2 to 3 hours

Dressing Parameters for CBN Grinding Wheel

2. Grinding Parameters for CBN Grinding Wheel

• Equipment: Jiantao Fully Automatic CNC Thread Grinding Machine SM-150
• Spindle Power: 7.5 KW
• Grinding Wheel Specification: 3A1 350×203×10×10, D64, Grade C100
• Cooling Method: Oil Cooling
• Workpiece Information: Helical Flute Tap, Specification M6, Cutting Edge Length 18 mm, 3 Flutes, Thread Pitch 1.0 mm, Flute Depth 0.63 mm
• Workpiece Material: Heye M35 High-Speed Steel
• Wheel Rotational Speed: 1600 RPM (equivalent to peripheral line speed 29 m/s)
• Grinding Depth: Full depth 0.63 mm completed in one pass
• Feed Rate Setting: 10
• Machining Cycle: 70 seconds per tap
• Dressing Interval & Depth: Dress the wheel after processing 200 taps, with a dressing depth of 0.01 mm

Grinding Parameters for CBN Grinding Wheel