Chapter 4 Preparations for installation
14
4.2.4. Serrated lock washer for hexagon socket head cap screw
Prepare the following serrated lock washer for hexagon socket head cap screw recommended by
Nabtesco:
Name: Belleville lock washer (made by Heiwa Hatsujyo Industry Co., Ltd.)
Corporation symbol: CDW-H,
CDW-L (Only for M5)
Material: S50C to S70C
Hardness: HR40 to 48
Table 4-6
When using any equivalent washer, select it with special care given to its outside diameter (ø D).
Nominal
size
ID and OD of Belleville
spring washer
t H
ød øD
5 5.25 8.5 0.6 0.85
6 6.4 10 1.0 1.25
8 8.4 13 1.2 1.55
10 10.6 16 1.5 1.9
12 12.6 18 1.8 2.2
14 14.6 21 2.0 2.5
16 16.9 24 2.3 2.8
18 18.9 27 2.6 3.15
20 20.9 30 2.8 3.55
Important
Fig. 4-7
Assemble the bolt so that the bolt
head faces this side
To Next Page
Loading...