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.
Belleville washer torque specs.
To better understand this we need to understand torque and its relationship to a bolted system.
1 spring is considered to be 1 in parallel 1 in series.
In lb ft lb n m in lb ft lb n m 1 2 540 45 61 660 55 75.
D nominal bolt diameter.
Belleville international manufactures belleville disc springs and spring washers.
This is the same with belleville washers.
Forces are decreased as m ore washers are used in series since some of the contact.
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.
Clamp load is also known as preload or initial load in tension on bolt.
Higher loads than f w.
Belleville washer stacking example.
This notation is needed for load calculations if n of springs in a stack then.
The values assume the following in addition to the information listed in the chart.
Ultimately though the answer comes from the sealing load needed on the gasket not from the belleville washer.
Again belleville washers are no exception.
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.
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.
Torque is the rotational force applied to a bolt to tighten a belleville disc spring.
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.
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.
Performance considerations a similar device is a wave washer.
And p bolt clamp load developed by tightening.
Home products belleville washers.
We utilize quality spring steels including carbon alloy tool grade specialty stainless nickel alloys titanium alloys and more.
Calculation example multiple belleville washers may be stacked to modify the spring constant or amount of.
Flat load is the amount of axial force required to flatten a belleville disc spring.
