The lee spring din belleville disc washer series offers metric disc spring washers to meet global demand for sizes specified by din 2093.
Belleville washer torque table.
The belleville washer can then be added seamlessly and no modification to this torque value is needed.
If you exceed a locking washer s torque by more than a few percent during assembly you destroy the locking washer.
D nominal bolt diameter.
G f ratio of yield point.
Thread friction coefficients have theoretical values.
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.
1 spring is considered to be 1 in parallel 1 in series.
Again belleville washers are no exception.
Clamp load lb is calculated by arbitrarily assuming.
Calculation example multiple belleville washers may be stacked to modify the spring constant or amount of.
All stainless steel hardware stainless steel hardware with bronze nut dia.
Silicon bronze hardware is not lubricated.
μ th thread friction coefficient μ h under head friction coefficient 1 n 0 225 lb 1 nm 0 738 ft lb.
When tightening according to guidelines and with no deviation this is the pre stress achieved expressed as of yield point.
So that the bolt and belleville washers work together make sure the torque for your belleville washers matches that of your bolts.
Clamp load is also known as preload or initial load in tension on bolt.
Belleville washer stacking example.
And p bolt clamp load developed by tightening.
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.
This is the same with belleville washers.
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.
The values assume the following in addition to the information listed in the chart.
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.
Cu c paste copper graphite paste molykote 1000 oil wd40 has been used.
This notation is needed for load calculations if n of springs in a stack then.
5500 lbf belleville washer as supplied by sefcor.
Belleville washers manufactured from steel strip are not scragged pre stressed during the manufacturing process and the inside and outside diameters of the disc.
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.
