Basic size of mm

d	55
D	120
T	31.5

The basic rated load is kN

trends C	140
static state Co	137

Fatigue load limit Pu	16.6

Rated rotation speed is r/min

Refer to the speed	4300
limit speed	5600

quality	1.55
model	*31311J2/QCL7C
ISO335 dimension series (ABMA)	7FB

Dimensions are mm

d	55
d1 ～	88.4
B	29
C	21
r1,2 min	2.5
r3,4 min	2
a	37

Shoulder gear and chamfer size mm

Da max	68
db min	65
Da min	94
Da max	112
Db min	113
Ca min	4
Cb min	10.5
ra max	2
rb max	2

Calculation coefficient

e	0.83
Y	0.72
Yo	0.4