TYPEⅠ(STRAIGHT TEETH)
Key Size
Outside Diameter
Width of tooth
Length
Neck Diameter
Suitable neck of shaft
4×1
4.25
1
48
6
>3-7
7×1.5
7.4
1.5
>4-10
7×2
2
>5-14
10×2
10.6
50
10×2.5
2.5
>7-18
10×3
3
TYPEII (STRAIGHT TEETH)
13×3
13.8
60
10
>77-18
13×4
4
>10-24
16×3
16.9
16×4
16×5
5
>14-30
19×4
20.1
19×5
22×4
23.2
12
22×5
25×5
26.5
28×5
26.7
TYPEIII (STRAIGHT TEETH)
22×6
>18-36
25×6
25×8
8
65
>24-42
28×6
29.7
28×8
32×6
33.9
>18-38
32×8
32×10
>30-48
38×6
40.3
14
38×8
38×10
70
45×8
47.7
15
45×10
>38-48