Basic size of mm

d	28.575
D	57.15
T	19.845

The basic rated load is kN

trends C	47.3
static state Co	55

Fatigue load limit Pu	6

Rated rotation speed is r/min

Refer to the speed	9000
limit speed	13000

quality	0.22
model	1988/1922/Q
series	1900

Dimensions are mm

d	28.575
d1 ～	42
B	19.355
C	15.875
r1,2 min	3.5
r3,4 min	1.5
a	14

Shoulder gear and chamfer size mm

Da max	35
db min	40
Da min	49
Da max	49.5
Db min	54
Ca min	3
Cb min	3.5
ra max	3
rb max	1.5

Calculation coefficient

e	0.33
Y	1.8
Yo	1