Grinding speed choice

When grinding materials of usual processability grinding speed increase under otherwise equal conditions typically leads to:

  • Grinding wheels durability increase;
  • Processed surface roughness reduction;
  • Cutting force Pz / Py decrease;
  • Wheels wear decrease;
  • Increased temperature in the cutting zone.

Formula to calculate the wheel speeddepending on the spindle rotation frequency and the wheel diameter

Table to determine spindle speed depending on the speed and the diameter of the wheel.

Surface speed Vс (m/s)
∅mm 20 25 30 35 40 45 50 63 80
20 19100 23870 28650 33420 38200 42970 47750 60160 76390
25 15280 19100 22920 26740 30560 34380 38200 48130 61120
32 11940 14920 17900 20890 23870 26860 29840 37600 47750
40 9550 11940 14320 16710 19100 21490 23870 30080 38200
50 7640 9550 11460 13370 15280 17190 19100 24060 30560
63 6060 7580 9090 10610 12130 13640 15160 19100 24250
80 4770 5970 7160 8360 9550 10740 11940 15040 19100
100 3820 4770 5730 6680 7640 8590 9550 12030 15280
115 3320 4150 4980 5810 6640 7470 8300 10460 13290
125 3060 3820 4580 5350 6110 6880 7640 9630 12220
150 2550 3180 3820 4460 5090 5730 6370 8020 10190
175 2180 2730 3270 3820 4370 4910 5460 6880 8730
180 2120 2650 3180 3710 4240 4770 5310 6680 8490
200 1910 2390 2860 3340 3820 4300 4770 6020 7640
230 1660 2080 2490 2910 3320 3740 4150 5230 6640
250 1530 1910 2290 2670 3060 3440 3820 4810 6110
300 1270 1590 1910 2230 2550 2860 3180 4010 5090
350 1090 1360 1640 1910 2180 2460 2730 3440 4370
400 950 1190 1430 1670 1910 2150 2390 3010 3820
450 850 1060 1270 1490 1700 1910 2120 2670 3400
500 760 950 1150 1340 1530 1720 1910 2410 3060

Recommended grinding speed

СТМ Without cooling With cooling
АС 15-20 м/с 20-60 м/с
CBN 15-30 м/с 35-50 м/с