Basic size of mm

d	50.8
D	85
T	17.462

The basic rated load is kN

trends C	50.1
static state Co	65.5

Fatigue load limit Pu	7.2

Rated rotation speed is r/min

Refer to the speed	5600
limit speed	8500

quality	0.37
model	18790/18720/Q
series	18700

Dimensions are mm

d	50.8
d1 ～	66
B	17.462
C	13.495
r1,2 min	3.5
r3,4 min	1.5
a	16

Shoulder gear and chamfer size mm

Da max	59
db min	62
Da min	75
Da max	77.5
Db min	79
Ca min	3
Cb min	3.5
ra max	3
rb max	1.5

Calculation coefficient

e	0.4
Y	1.5
Yo	0.8