Belleville Spring Washers

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D_R (mm) min max

D_i (mm) min max

D₀ (mm) min max

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Part Number	D_R (mm)	D_i (mm)	D₀ (mm)	D_H (mm)	t (mm)	L₀ (mm)	L₁ (mm)	P₁ (N)	P_F (N)
B0187007	2.36	2.36	4.75	4.76	0.17	0.33	0.25	25.4-34.7	44
B0187007S	2.36	2.36	4.75	4.76	0.17	0.33	0.25	25.4-34.7	44
B0187010	2.36	2.36	4.75	4.76	0.25	0.38	0.32	57.8-78.3	124
B0187010S	2.36	2.36	4.75	4.76	0.25	0.38	0.32	57.8-78.3	124
B0250009	3.18	3.18	6.35	6.35	0.22	0.44	0.33	44-60.1	75
B0250009S	3.18	3.18	6.35	6.35	0.22	0.44	0.33	44-60.1	75
B0250013	3.18	3.18	6.35	6.35	0.34	0.51	0.43	97.9-133.5	214
B0250013S	3.18	3.18	6.35	6.35	0.34	0.51	0.43	97.9-133.5	214
B0375019	3.18	3.18	9.53	9.53	0.47	0.71	0.58	156.7-211.8	325
B0281010	3.51	3.51	7.14	7.14	0.25	0.51	0.38	56.8-76.8	102
B0281013	3.51	3.51	7.14	7.14	0.33	0.53	0.43	92.5-125.4	191
B0281015	3.51	3.51	7.14	7.14	0.38	0.58	0.48	124.3-173.2	276
B0281015S	3.51	3.51	7.14	7.14	0.38	0.58	0.48	126.8-171.2	276
B0437022	3.51	3.51	11.10	11.13	0.56	0.81	0.69	208.2-281.6	440
B0312011	3.97	3.96	7.92	7.95	0.27	0.55	0.41	70.3-95.2	120
B0312011S	3.97	3.96	7.92	7.95	0.27	0.55	0.41	70.3-95.2	120
B0312017	3.97	3.96	7.92	7.95	0.42	0.64	0.53	155.7-214	334
B0312017S	3.97	3.96	7.92	7.95	0.42	0.64	0.53	155.7-214	334
B0343013	4.17	4.17	8.71	8.74	0.33	0.61	0.46	94.6-127.9	169
B0343016	4.17	4.17	8.71	8.74	0.41	0.66	0.53	136.1-184.1	289

BELLEVILLE SPRING WASHERS

Belleville spring washers are especially suited for applications requiring high loads in small spaces. By combining them in varying sequences, each size gives numerous load-carrying possibilities. These washers have had all set removed during the manufacturing process.

MATERIAL

Spring steel
Commercial 1074 - certified to ASTM A684

Stainless steel (parts with suffix ‘S’)
Thickness (t) up to and including 1.83mm
Commercial - Type 302
Government AMS 5906 type 302

Thickness (t) over 1.83mm
Commercial - Type 17-7PH certified to AMS 5528

LOAD & DEFLECTION

Typical load-deflection curves for three characteristics proportions of washers listed are shown Figure 1 below From them, loads at intermediate heights may be estimated. The nominal amount of dish or cone (h) is found by subtracting ‘t’ from ‘Lo’.

These typical curves are shown with dotted lines beyond 75% of deflection to indicate that load characteristics in this area are not reliable because of partial bottoming of the washers. Load at 75% deflection is approximately 87% of the load at flat position

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