Basic size of mm

d	17
D	30
B	7

The basic rated load is kN

trends C	3.9
static state Co	2.45

Fatigue load limit Pu	0.108

Rated rotation speed is r/min

Refer to the speed	50000
limit speed	32000

Mass kg	0.019
model	W61903-2Z

Dimensions are mm

d	17
d1 ～	21
D1 ～	27.8
r1,2 min	0.3

Shoulder gear and chamfer size mm

da min	19
Da max	28
ra max	0.3

Calculation coefficient

kr	0.02
fo	15