Correction factor for bearing sets and different preload classes

Bearing type	Arrangement		Correction factor C₁
Bearing series		Designation	Preload class
		suffix	A	L	B	M	C	F	D

Angular contact ball bearing
719 D, 70 D, 72 D	Set of 2, back-to-back	DB	0,81	–	0,75	–	0,65	–	0,4
	Set of 2, face-to-face	DF	0,77	–	0,72	–	0,61	–	0,36
	Set of 3, back-to-back and tandem	TBT	0,7	–	0,63	–	0,49	–	0,25
	Set of 3, face-to-face and tandem	TFT	0,63	–	0,56	–	0,42	–	0,17
	Set of 4, tandem back-to-back	QBC	0,64	–	0,6	–	0,53	–	0,32
	Set of 4, tandem face-to-face	QFC	0,62	–	0,58	–	0,48	–	0,27
718 D, 719 E, 70 E	Set of 2, back-to-back	DB	0,8	–	0,65	–	0,4	–	–
	Set of 2, face-to-face	DF	0,77	–	0,61	–	0,36	–	–
	Set of 3, back-to-back and tandem	TBT	0,69	0,72	0,49	0,58	0,25	0,36	–
	Set of 3, face-to-face and tandem	TFT	0,63	0,66	0,42	0,49	0,17	0,24	–
	Set of 4, tandem back-to-back	QBC	0,64	–	0,53	–	0,32	–	–
	Set of 4, tandem face-to-face	QFC	0,62	–	0,48	–	0,27	–	–
719 B, 70 B	Set of 2, back-to-back	DB	0,83	–	0,78	–	0,58	–	–
	Set of 2, face-to-face	DF	0,8	–	0,74	–	0,54	–	–
	Set of 3, back-to-back and tandem	TBT	0,72	–	0,66	–	0,4	–	–
	Set of 3, face-to-face and tandem	TFT	0,64	–	0,56	–	0,3	–	–
	Set of 4, tandem back-to-back	QBC	0,67	–	0,64	–	0,48	–	–
	Set of 4, tandem face-to-face	QFC	0,64	–	0,6	–	0,41	–	–

Double direction angular contact thrust ball bearings
BTW	-	–	1	–	–	–	–	–	–
BTM	-	–	1	–	0.5	–	–	–	–

Angular contact thrust ball bearings for screw drives
BSA, BSD	Set of 2	-	0.8	-	0.4	-	-	-	-
	Set of 3	-	0.65	-	0.3	-	-	-	-
	Set of 4	-	0.5	-	0.25	-	-	-	-

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