Belleville Washer Torque Specs

The values assume the following in addition to the information listed in the chart.

Belleville washer torque specs.

We utilize quality spring steels including carbon alloy tool grade specialty stainless nickel alloys titanium alloys and more. All stainless steel hardware stainless steel hardware with bronze nut dia. American belleville washers hold your bolted joint tight in the face of the most extreme cases of differential thermal expansion contraction bolt creep and vibration that threaten the integrity of the joint. 1 spring is considered to be 1 in parallel 1 in series.

Torque is the rotational force applied to a bolt to tighten a belleville disc spring. Again belleville washers are no exception. D nominal bolt diameter. Silicon bronze hardware is not lubricated.

If you exceed a locking washer s torque by more than a few percent during assembly you destroy the locking washer. This is the same with belleville washers. Torque calculation the widely accepted formula is as follows t k f d where k estimated nut friction factor t bolt torque d nominal bolt diameter. This notation is needed for load calculations if n of springs in a stack then.

Home products belleville washers. Torque is a rotational force which when applied to a bolt is converted to an axial load stretching the bolt like a spring. Calculation example multiple belleville washers may be stacked to modify the spring constant or amount of. Higher loads than f w.

Flat loading a belleville disc spring helps to ensure that bolts do not loosen while machinery is in use. So that the bolt and belleville washers work together make sure the torque for your belleville washers matches that of your bolts. Forces are decreased as m ore washers are used in series since some of the contact. We specialize in high temperature applications and the most corrosive environments where first rate quality is.

Tightening torque values are calculated from the formula t kdp where t tightening torque. The belleville will be in its flat position when the preload in the bolt equals the flat load1 since the spring will be clamped between the flat joint an d the nut any additional torque applied to the nut will only stretch the bolt. Clamp load lb is calculated by arbitrarily assuming. Flat load is the amount of axial force required to flatten a belleville disc spring.

5500 lbf belleville washer as supplied by sefcor. In lb ft lb n m in lb ft lb n m 1 2 540 45 61 660 55 75. Ultimately though the answer comes from the sealing load needed on the gasket not from the belleville washer. To better understand this we need to understand torque and its relationship to a bolted system.

Performance considerations a similar device is a wave washer. Belleville international manufactures belleville disc springs and spring washers.