Can wave washers and Belleville washers be used interchangeably?

Not generally — they have different force-deflection characteristics for a given size, so a direct swap without recalculating the joint's spring requirement can result in either insufficient clamp load retention or an unexpectedly stiff joint.

Does stacking Belleville washers always increase force?

Only in parallel (same-orientation, nested) stacking; series (alternating orientation) stacking increases total deflection at the same force level as a single washer, so the stacking method needs to match whether more force or more deflection is the actual goal.

Are wave washers or Belleville washers better for vibration resistance?

Neither is primarily a vibration-loosening prevention device (that's the role of thread-locking features) — their function is maintaining clamp load through axial spring force as the joint settles or experiences thermal expansion, which is a related but distinct function from resisting rotational loosening.

Wave Washers and Belleville Washers: Spring Force in a Flat Package

Wave washers and Belleville (disc spring) washers both function as a spring element within a bolted joint rather than a simple flat spacer — their job is to maintain some clamp load and take up axial movement as the joint settles, rather than being purely rigid like a standard flat washer.

Wave washers: moderate force, more axial travel

A wave washer has a sinusoidal wave form around its circumference, and as it's compressed flat, it provides spring force over a relatively larger amount of axial deflection compared to a Belleville washer of similar size. This makes wave washers well suited to applications needing moderate, relatively gentle spring loading and some tolerance for accumulated stack-up variation — common in bearing preload applications and general light-duty spring loading where a large single Belleville washer's higher force isn't needed.

Belleville washers: high force, minimal axial space

A Belleville washer is a conical disc shape that, when flattened under load, delivers significantly higher spring force per unit of axial deflection than a wave washer of comparable diameter — this makes it the choice when substantial spring force is needed but installation space is tight, or when Belleville washers are stacked in series or parallel configurations to fine-tune the combined force-deflection characteristic for a specific joint. Belleville washers are also commonly used specifically to maintain clamp load in joints prone to relaxation (see our article on preload loss and relaxation) since their spring characteristic continues providing force even as some settling occurs.

Stacking configurations for Belleville washers

Series stacking (alternating orientation) — increases total deflection while keeping the same force as a single washer, useful when more axial travel is needed at the same force level.
Parallel stacking (same orientation, nested) — increases the total force at the same deflection as a single washer, useful when higher force is needed within the same axial travel.
Series-parallel combinations — used to tune both force and deflection to a specific target that a single washer or simple stack can't achieve.

Choosing between the two

If the joint has generous axial space and needs moderate, gentle spring loading, a wave washer is often the simpler and lower-cost choice. If space is constrained, higher force is needed, or the application benefits from a tunable stack configuration, Belleville washers offer more flexibility at a correspondingly higher engineering and part-count complexity.

Send us your force requirement, available axial space, and joint application through our contact form and we can help identify the right washer type and configuration.