Belleville Washer Torque Specs

To better understand this we need to understand torque and its relationship to a bolted system.

Belleville washer torque specs.

1 spring is considered to be 1 in parallel 1 in series. Clamp load is also known as preload or initial load in tension on bolt. D nominal bolt diameter. 5500 lbf belleville washer as supplied by sefcor.

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. Ultimately though the answer comes from the sealing load needed on the gasket not from the belleville washer. Silicon bronze hardware is not lubricated. Calculation example multiple belleville washers may be stacked to modify the spring constant or amount of.

Clamp load lb is calculated by arbitrarily assuming. Torque is a rotational force which when applied to a bolt is converted to an axial load stretching the bolt like a spring. Belleville washer stacking example. Flat load is the amount of axial force required to flatten a belleville disc spring.

This notation is needed for load calculations if n of springs in a stack then. 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. Home products belleville washers. Forces are decreased as m ore washers are used in series since some of the contact.

We utilize quality spring steels including carbon alloy tool grade specialty stainless nickel alloys titanium alloys and more. Again belleville washers are no exception. Torque is the rotational force applied to a bolt to tighten a belleville disc spring. And p bolt clamp load developed by tightening.

This is the same with belleville washers. All stainless steel hardware stainless steel hardware with bronze nut dia. In lb ft lb n m in lb ft lb n m 1 2 540 45 61 660 55 75. 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. Belleville international manufactures belleville disc springs and spring washers. So that the bolt and belleville washers work together make sure the torque for your belleville washers matches that of your bolts. Performance considerations a similar device is a wave washer.

The values assume the following in addition to the information listed in the chart. We specialize in high temperature applications and the most corrosive environments where first rate quality is.