IIS BELLEVILLE WASHER DIN 6796

IIS manufactures Belleville washer in imperial as well as metric sizes. Belleville washers also called conical spring washers are manufactured as per DIN 6796 and are designed specifically for Heavy Duty Bolted section such as Bus Bars, Transformers, Rectifiers, Heat Exchangers, Transmission etc. These washers are intended to counteract the effect of setting which results in bolt/nut assemblies working loose. They do not effectively prevent loosening of the assembly under varying radial load and are designed for use with short bolts predominantly subject to thrust.

Belleville Washer
Belleville Washer DIN 6796

Belleville washers are high stressed components and cannot be used for dynamic loading and infrequent varying load applications. The force give in the table below is approximate.

IIS Belleville washers are made from various Carbon steel grades, Chrome-Vanadium steel, Stainless steel etc.

Belleville Washers
Quality and Testing
IIS Belleville Washers are tested as per DIN 6796 and DIN 267 Part 26. Most thicker sizes are supplied in phosphated & oiled condition.

IIS has ready stock of all standard sizes of Belleville washers Carbon Steel material. Other materials are also available on request.

Heavy Duty Belleville Washers As per DIN 6796
Material : 50CrV4 or Spring Steel CK75

Nominal Bolt Size mm
d1 H14 mm d2 H14 mm s3) mm h max 1) mm h min 2) mm Flattening Force N Residual Spring Force N
2 4) 2.2 5 0.4 0.60 0.50 920 -
2.5 4) 2.7 6 0.5 0.72 0.61 1540 -
3 4) 3.2 7 0.6 0.85 0.72 2350 -
3.5 4) 3.7 8 0.8 1.06 0.92 3160 -
4 4.3 9 1.0 1.30 1.12 4050 1400
5 5.3 11 1.2 1.55 1.35 6700 2300
6 6.4 14 1.5 2.00 1.70 9400 4200
7 7.4 17 1.75 2.30 2.00 13700 6200
8 8.4 18 2.0 2.60 2.24 17200 7700
10 10.5 23 2.5 3.20 2.80 27500 12400
12 13 29 3.0 3.95 3.43 40000 18000
14 15 35 3.5 4.65 4.04 55000 25000
16 17 39 4.0 5.25 4.58 75000 34000
18 19 42 4.5 5.80 5.08 95000 57000
20 21 45 5.0 6.40 5.60 122000 73000
22 23 49 5.5 7.05 6.15 152000 91000
24 25 56 6.0 7.75 6.77 175000 122000
27 28 60 6.5 8.35 7.30 230000 161000
30 31 70 7.0 9.20 8.00 280000 196000

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