Success Stories

Centerless Grinding Vitrified CBN

Part: Engine Sleeve. 5" skirt diameter, 5.5" flange diameter and 11" O.A.L.
Part Tolerances: Roundness ± 0.00025" tightest on flange diameter
Material: Cast Iron
Hardness: 40 - 52 Rc
Stock Removal: 0.010" on diameter
Wheel Specification: Wheel set (wheel 1 - 24" x 1" x 12") (wheel 2 - 24" x 8" x 12") Vitrified CBN (Maximizer)

Conventional SiC Wheel

Wheel Speed: 5,000 S.F.P.M.
Work Speed: Regulating wheel rpm 100
Pieces per dress: 3
InFeed per dress: 0.0004" 1 pass
InFeed rate: 0.012" per minute Dwell 22 sec.
Coolant: Synthetic
Total Cycle Time: 36 seconds

Vitrified CBN

Wheel Speed: 8,500 S.F.P.M.
Work Speed: Regulating wheel rpm 100
Pieces per dress: 900+
InFeed per dress: 0.0004" 1 pass
InFeed rate: 0.019" per minute Dwell 12 sec.
Coolant: Synthetic
Total Cycle Time: 20 seconds

Savings / Advantages: Production increase of nearly 2 times. Conventional SiC wheel lasted 7 days and change over took hours. CBN wheel lasted 9 months.