Basic size of mm

d	257.175
D	358.775
T	71.438

The basic rated load is kN

trends C	842
static state Co	1760

Fatigue load limit Pu	156

Rated rotation speed is r/min

Refer to the speed	1200
limit speed	1700

quality	20.5
model	M249747/710
series	M249700

Dimensions are mm

d	257.175
d1 ～	297
B	57.15
C	44.45
r1,2 min	6.4
r3,4 min	3.3
a	60

Shoulder gear and chamfer size mm

Da max	273
db min	289
Da min	318
Da max	343
Db min	331
Ca min	9
Cb min	12.5
ra max	6
rb max	3

Calculation coefficient

e	0.35
Y	1.7
Yo	0.9