Basic size of mm

d	263.525
D	325.438
T	28.575

The basic rated load is kN

trends C	220
static state Co	550

Fatigue load limit Pu	48

Rated rotation speed is r/min

Refer to the speed	1300
limit speed	1800

quality	53
model	38880/38820
series	38800

Dimensions are mm

d	263.525
d1 ～	294
B	28.575
C	25.4
r1,2 min	1.5
r3,4 min	1.5
a	49

Shoulder gear and chamfer size mm

Da max	282
db min	275
Da min	307
Da max	315
Db min	313
Ca min	4
Cb min	3
ra max	1.5
rb max	1.5

Calculation coefficient

e	0.37
Y	1.6
Yo	0.9