Long Lasting DIN137A Curved Spring Washer

The Long lasting DIN137A Curved Spring Washer in the Xiaoguo® inventory can be provided to interested customers for free as samples. We recommend that customers first test the samples to ensure their quality, and then place large orders after that, to save time for adjustments.

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Product Description

Application of Long lasting DIN137A Curved Spring Washer in Motors and Transmission Systems

In the motor and transmission systems, the Long lasting DIN137A Curved Spring Washer acts as the "killer of axial clearance" and the "guardian of preload force".

【1】Why are Long lasting DIN137A Curved Spring Washer indispensable in motors and transmission systems?

（1）Motors and transmissions run into a few common problems:

Heat expansion – When things heat up, the rotor and shaft expand, which changes how much clearance the bearings have.

Manufacturing tolerances – Parts don't get made perfectly, so they never line up exactly. There's always a tiny mismatch.

Wear and tear – Over time, bearing surfaces or washers slowly wear out, which creates extra gaps where there shouldn't be any.

Vibration and noise – When parts move back and forth, bearings start making weird noises, and gears can bang into each other.

（2）Solution for Long lasting DIN137A Curved Spring Washer:

It uses a curved or wavy shape, so when you press it flat, it keeps pushing back.

Automatically compensate for the changes in clearance caused by the aforementioned factors

Always maintain the correct preload of the bearings or gears to prevent loosening.

Long Lasting DIN137A Curved Spring Washer

Mon	ɸ2	ɸ2.5	ɸ3	ɸ4	ɸ5	ɸ6	ɸ8	ɸ10
d min	2.2	2.7	3.2	4.3	5.3	6.4	8.4	10.5
d max	2.45	2.95	3.5	4.6	5.6	6.76	8.76	10.93
dc min	4.2	5.2	5.7	7.64	9.64	10.57	14.57	17.57
dc max	4.5	5.5	6	8	10	11	15	18
H min	0.5	0.55	0.65	0.8	0.9	1.1	1.7	2
H max	1	1.1	1.3	1.6	1.8	2.2	3.4	4
h	0.3	0.3	0.4	0.5	0.5	0.5	0.5	0.8

【2】Typical application scenarios

（1）Small DC motor

Place a Long lasting DIN137A Curved Spring Washer between the outer ring of the bearing and the end cover.

Eliminate the axial play of the bearing, reduce operating noise, and extend the service life of the bearing.

(2) Servo motors

Put a steady preload between the front and rear bearings. It helps the rotor stay more precisely in place and cuts down on vibration.

(3) Appliance motors (fans, washing machines)

These wave washers push on the bearings with roughly 5 to 20 Newtons of force. That stops the bearings from shifting around inside the housing and makes the motor quieter.

FAQ

（1）Q: Can you make custom‑sized Long lasting DIN137A Curved Spring Washer that aren’t standard?

A: Yes. We can change the inner diameter, outer diameter, thickness, and curve height based on your drawing or a sample. We can also add custom markings and do special packaging if needed.

(2) Q: Will it work in high‑vibration motors or transmission parts?

A: Yeah, it does the job. It takes up vibration as the equipment runs, handles gaps from heat expansion, and keeps the bolt tight over time.

(3) Q: Can I use a curved spring washer with a high‑strength bolt (grade 10.9 or 12.9)?

A: Not really – it’s not recommended. These washers work best with bolts grade 5.8 or lower.