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Heavy Duty Bolting Washers to DIN 6796

heavy duty bolting washers to din 6796
     DIN 6796 high-duty safe spring washers (HDS series) are designed for the connection of bolts.
din 6796
They are produced based on standard DIN 6796 and used to connect medium or high-strength bolts.

     HDS series are very useful for large bearing load and good elasticity resumption. The tension of bolt is able to endure the relaxation due to following: abrasion, deformation, relaxation, expansion due to heat, or shrinkage of wearing parts, or pressing of sealing parts. HDS series greatly increase the elasticity of bolts, can effectively substitute for conventional spring washers, but not suitable for combinations of locking washers or flat washers.

      HDS series of disc springs are applicable in an opposition or superposition combination. The opposition combination is able to increase the deformation of the pair of disc springs, while the superposition combination is able to increase the tension of the pair of disc springs. It's better that they are pressed to flatness in assembly because this status will increase the tension moment, and then an appropriate bolt tension may be obtained without a torque wrench.

Item no.
Used for
D/mm
d/mm
t/mm
Hmax/mm
Hmin/mm
F/N
Weight per 1000pcs
SY401
M2
5
2.2
0.4
0.6
0.5
630
0.05
SY402
M2.5
6
2.7
0.5
0.72
0.61
950
0.09
SY403
M3
7
3.2
0.6
0.85
0.72
1320
0.14
SY404
M3.5
8
3.7
0.8
1.06
0.92
2400
0.25
SY405
M4
9
4.3
1
1.3
1.12
3800
0.38
SY406
M5
11
5.3
1.2
1.55
1.35
5500
0.68
SY407
M6
14
6.4
1.5
2
1.7
8600
1.42
SY408
M7
17
7.4
1.75
2.3
2
11300
2.51
SY409
M8
18
8.4
2
2.6
2.24
14900
3.1
SY410
M10
23
10.5
2.5
3.2
2.8
22100
5.13
SY411
M12
29
13
3
3.95
3.43
34100
12.35
SY412
M14
35
15
3.5
4.65
4.04
46000
21.44
SY413
M16
39
17
4
5.25
4.58
59700
30.19
SY414
M18
42
19
4.5
5.8
5.08
74400
38.68
SY415
M20
45
21
5
6.4
5.6
93200
48.52
SY416
M22
49
23
5.5
7.05
6.15
114000
63.07
SY417
M24
56
25
6
7.75
6.77
131000
92.3
SY418
M27
60
28
6.5
8.35
7.3
154000
112.13
SY419
M30
70
31
7
9.2
8
172000
168.92
SY420
M33
76
34
7.5
10
8.5
226000
213.52
SY421
M36
83
37.2
8
10.5
9.2
276000
271.39
SY422
M42
96
43.5
8.5
12
10.5
290000
383.61
SY423
M48
110
49.5
9
12.5
11
261000
535.18
SY424
M56
128
58
9.5
13.5
12
260000
762.21
SY425
M64
136
66
10
14
12.8
277000
871.34
SY426
M72
145
74
10.5
15
13
327000
1006.08
SY427
M90
160
92.5
11
16
14
378000
1155.31
SY428
M100
180
102.5
11.5
17
15
370000
1551.52
SY429
M125
220
128
12
19
16.5
365000
2367.49

DIN 6796 disc spring for Bulldozer

DIN 6796 disc spring for excavator

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