And p bolt clamp load developed by tightening.
Belleville washer torque table.
When tightening according to guidelines and with no deviation this is the pre stress achieved expressed as of yield point.
1 spring is considered to be 1 in parallel 1 in series.
D nominal bolt diameter.
The belleville washer can then be added seamlessly and no modification to this torque value is needed.
Calculation example multiple belleville washers may be stacked to modify the spring constant or amount of.
The lee spring din belleville disc washer series offers metric disc spring washers to meet global demand for sizes specified by din 2093.
Should you have any additional questions our engineering team here at belleville international is available for your convenience and can be reached by calling 877 235 5384.
Lee spring also expand on size options past din 2093 s standard size tables made to din manufacturing and quality specifications to provide component flexibility for product designers.
Belleville washers manufactured from steel strip are not scragged pre stressed during the manufacturing process and the inside and outside diameters of the disc.
In lb ft lb n m in lb ft lb n m 1 2 540 45 61 660 55 75.
If you exceed a locking washer s torque by more than a few percent during assembly you destroy the locking washer.
5500 lbf belleville washer as supplied by sefcor.
The values assume the following in addition to the information listed in the chart.
Belleville washer stacking example.
All stainless steel hardware stainless steel hardware with bronze nut dia.
G f ratio of yield point.
Cu c paste copper graphite paste molykote 1000 oil wd40 has been used.
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.
Tightening torque values are calculated from the formula t kdp where t tightening torque.
So that the bolt and belleville washers work together make sure the torque for your belleville washers matches that of your bolts.
This notation is needed for load calculations if n of springs in a stack then.
Clamp load lb is calculated by arbitrarily assuming.
Performance considerations a similar device is a wave washer.
μ th thread friction coefficient μ h under head friction coefficient 1 n 0 225 lb 1 nm 0 738 ft lb.
Belleville washers are a more economical and less precise form of conical disc spring best used for static applications where some setting and or loss of force can be tolerated.
The belleville will be in its flat position when the preload in the bolt equals the flat load 1 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 is also known as preload or initial load in tension on bolt.
Again belleville washers are no exception.
