Basic size of mm

d	12
D	21
B	5

The basic rated load is kN

trends C	1.21
static state Co	0.64

Fatigue load limit Pu	0.028

Rated rotation speed is r/min

Refer to the speed	70000
limit speed	36000

Mass kg	0.0065
model	W61801-2Z

Dimensions are mm

d	12
d1 ～	13.8
D1 ～	19.2
r1,2 min	0.3

Shoulder gear and chamfer size mm

da min	13.8
Da max	19
ra max	0.3

Calculation coefficient

kr	0.015
fo	9.7