Belleville Spring

BELLEVILLE SPRINGS

Belleville spring washers are especially suited for applications requiring high loads in small spaces.  By combining them in varying sequences, each size gives numerous load-carrying possibilities. These washers have had all set removed during the manufacturing process.

 

LOAD & DEFLECTION

Typical load-deflection curves for three characteristics proportions of washers listed are shown Figure 1 below From them, loads at intermediate heights may be estimated. The nominal amount of dish or cone (h) is found by subtracting ‘t’ from ‘Lo’.

These typical curves are shown with dotted lines beyond 75% of deflection to indicate that load characteristics in this area are not reliable because of partial bottoming of the washers. Load at 75% deflection is approximately 87% of the load at flat position
Typical load-deflection curves for three characteristics proportions of washers listed are shown Figure 1 below From them, loads at intermediate heights may be estimated. The nominal amount of dish or cone (h) is found by subtracting ‘t’ from ‘Lo’. These typical curves are shown with dotted lines beyond 75% of deflection to indicate that load characteristics in this area are not reliable because of partial bottoming of the washers. Load at 75% deflection is approximately 87% of the load at flat position

 

 

 

Material

Spring steel

Commercial 1074 – certified to ASTM A684

Stainless steel (parts with suffix ‘S’)

Thickness (t) up to and including 1.83mm

Commercial – Type 302

Government AMS 5906 type 302

Thickness (t) over 1.83mm

Commercial – Type 17-7PH certified to AMS 5528

Wave Spring

WAVE SPRINGS

VS Wave Spring in High Carbon and Stainless Steel Material

Wave Spring is normally used in thrust loading applications for small deflections, particularly where radial space is limited. A typical example is the axial loading of ball bearings.
The spring rate is approximately linear between 20% and 80% of available deflection.

 

Flat Spring Washers

Material

Stainless Steel – VWS

• 302 or its equivalent

High Carbon Steel – VWC

• 1074 or its equivalent

 

Finish

Wave Spring is carried in inventory in plain finish only. Electroplating or other surface treatments are available upon request.

Please contact us for recommendations on specific applications or finishing requirements.

Disc Spring

DIN2093

DISC SPRINGS

Disc springs are conical shaped washers designed to be loaded in the axial
direction only.

Disc springs can be statically loaded, either continuously or intermittently, or cyclically defected i.e. dynamically loaded.

Manufactured under strict quality control to conform DIN2093, disc springs in this range are for arduous applications which require high resistance to fatigue.

Material

Thickness less than 1.25mm: Carbon steel per C1074-1075 – CK67, Phosphate + oil finish. Thickness 1.25mm and up: Chrome Vanadium per SAE 6150 – 50CrV4, Phosphate + oil finish.
Some parts are available in Stainless Steel and other materials on request.

In disc spring stacks, particularly those with parallel units, friction should be considered. Sliding friction is created at the disc’s adjoining, moving surfaces. 
As a result, the deflection which occurs when loading a stack of discs will lag as the stack is unloaded.
This characteristic may be taken advantage of in shock or oscillatorily loaded systems needing damping.
For Various h/t Ratios, the spring is loaded on its inside diameter so that it can be deflected beyond the flat posi-tion, the greatest possible deflection can be utilized. Since the load-deflection data beyond the flat position are symmetrical, the plot has been labeled so that loads may be determined for beyond the 100-percent flat position by reading it upside-down.

LOAD & DEFLECTION

In disc spring stacks, particularly those with parallel units, friction should be considered. Sliding friction is created at the disc’s adjoining, moving surfaces. As a result, the deflection which occurs when loading a stack of discs will lag as the stack is unloaded. This characteristic may be taken advantage of in shock or oscillatorily loaded systems needing damping. For Various h/t Ratios, the spring is loaded on its inside diameter so that it can be deflected beyond the flat posi-tion, the greatest possible deflection can be utilized. Since the load-deflection data beyond the flat position are symmetrical, the plot has been labeled so that loads may be determined for beyond the 100-percent flat position by reading it upside-down.
Multiwave Spring

MULTIWAVE SPRINGS

Multiwave springs replace conventional round wire springs when space is critical; they will occupy only 1/3 to 1/2 of the compressed height space of a traditional round wire spring, while providing more deflection with the same load specifications.

VS Multiwave springs are used for all applications requiring tight load deflection specifications where axial space is critical.

A single filament of round edged, pre-tempered flat wire is used to form the springs from a continuous coil. This results in uniform diameters and wave heights.

Material

Stainless steel commercial type 17-7 PH (slightly magnetic)

Maximum application temperature is 650ºF (340ºC)

Finish

Plain finish is standard

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