Basic size of mm

d	40
D	90
B	23

The basic rated load is kN

trends C	93
static state Co	78

Fatigue load limit Pu	10.2

Rated rotation speed is r/min

Refer to the speed	8000
limit speed	9500

Specification standard holder	0.73

model

Standard holder	*NU308ECP
Other holder 1)	J,M,ML

Dimensions are mm

d	40
d1 ～	57.5
D1 ～	75.6
F,E	52
r1,2 min	1.5
r3,4 min	1.5
s1)	1.4

Shoulder gear and chamfer size mm

da min	49
Da max	50
db,Da min	54
Da max	81
ra max	1.5
rb max	1.5

Calculation coefficient

kr	0.15

Corner circle

model	HJ308EC
quality	0.084
Size B1	7
Size B2	11