Basic size of mm

d	20
D	52
B	15

The basic rated load is kN

trends C	35.5
static state Co	26

Fatigue load limit Pu	3.25

Rated rotation speed is r/min

Refer to the speed	15000
limit speed	18000

Specification standard holder	0.17

model

Standard holder	*NJ304ECP
Other holder 1)	-

Dimensions are mm

d	20
d1 ～	31.2
D1 ～	42.4
F,E	27.5
r1,2 min	1.1
r3,4 min	0.6
s1)	0.9

Shoulder gear and chamfer size mm

da min	27
Da max	29
db,Da min	33
Da max	45
ra max	1
rb max	0.6

Calculation coefficient

kr	0.15

Corner circle

model	HJ304EC
quality	0.017
Size B1	4
Size B2	6.5