... with a contact angle of 15 degrees (series 70C, 72C, 70A) or 25 degrees (series 72A) are manufactured to tolerance classes ... 73Bmachined brass cage (M, MA, MB) for series 70C, 72C, 70A and 72Apolyamide cage (TN)textolite cage (T, TA, TB) for ... series 70C, 72C, 70A and 72A5) APPLICATIONSa) ENGINEERING MACHINE INDUSTRYb) METAL- WORKING INDUSTRYc) CHEMICAL ...