model

open	F688
With dust cover	WF688 ZZ

key dimension (mm)

d	8
D	16
B	4
B1	5
r min.	0.2
r1 min.	0.2

specified load (N)

Cr	1.6
Cor	0.71

Limit of rotation speed (rpm)

Grease Open type (ZZ, ZZX)	42000
Oil Open Type (Z, ZX)	50000

Flange size(mm)

D1	18
D2	18
C1	1
C2	1.1

Shoulder retaining size (mm)

da min.	9.6
ra max.	0.2

weight(g)

Approx	3.6