A BELLEVILLE DISC SPRING CAN BE THE SOLUTION TO YOUR PROBLEM Common Applications Where: a high spring force and small movement is required in a restricted space. spring movement is required with a constant pressure (very low spring rate). Advantages: High load capacity in a small space not possible with ordinary coil springs, thus effecting the important economics in housing materials. The ability to achieve linear or non-linear regressive load deflection characteristics. Maintain high tension in bolted applications such as heavy switchgears, busbars, etc. Compensate for different expansion rates in a joint and still maintain a high tension. They act as a shock absorber or perform a dampening function. Deflection and load characteristics can be changed in disc springs by stacking in series, parallel or series -- parallel. Limitless Combinations Can Meet Most Requirements: Load Solution Formula: E = Constant Steel = 33 x 106 E = Stainless Steel = 30.6 x 106 E = Plus Bronze = 15.6 x 106 Pf = Flatload Carrying Capacity    h = Dish Height t = Thickness a = 1/2 of O.D. M = Constant from Table M = (O.D. / I.D. Ratio) Ratio M 1.00 .000 1.05 .083 1.10 .166 1.15 .2285 1.20 .291 1.25 .3395 1.30 .388 1.35 .426 1.40 .464 1.45 .493 1.50 .522 1.55 .5465 1.60 .571 1.65 .591 1.70 .611 1.75 .6265 1.80 .642 1.85 .655 1.90 .668 1.95 .6785 2.00 .689 2.05 .698 2.10 .707 2.15 .714 2.20 .721 2.25 .7265 2.30 .732 Ratio M 2.35 .7375 2.40 .743 2.45 .747 2.50 .751 2.55 .754 2.60 .757 2.65 .760 2.70 .763 2.75 .765 2.80 .767 2.85 .7685 2.90 .770 2.95 .771 3.00 .772 3.05 .773 3.10 .774 3.15 .775 3.20 .776 3.25 .7765 3.30 .777 3.35 .778 3.40 .779 3.45 .7785 3.50 .778 3.55 .778 3.60 .778 3.65 .778 Ratio M 3.70 .778 3.75 .778 3.80 .778 3.85 .777 3.90 .776 3.95 .7755 4.00 .775 4.05 .7745 4.10 .774 4.15 .7735 4.20 .773 4.25 .7725 4.30 .772 4.35 .7715 4.40 .771 4.45 .770 4.50 .769 4.55 .768 4.60 .767 4.65 .766 4.70 .765 4.75 .7645 4.80 .764 4.85 .763 4.90 .762 4.95 .761 5.0 .760 Key Bellevilles, Inc. 100 Key Lane, Leechburg, Pennsylvania 15656-9531 Phone: 724.295.5111   Toll Free: 800.245.3600 Fax: 724.295.2570   Toll Free: 800.847.1672 sales@keybellevilles.com