Metric Bowman Oilless® Washers

Part Number: WMOW 90 170 10

Bowman Oilless thrust washers dry-running bronze

Details

Inner Diameter	90
Outer Diameter	170
Thickness	10

Material Specification

Structure	CuZn25Al6Mn4 Bronze with solid graphite lubricant inserts (alternative specifications are available on request)
PV (N/mm² x m/s)	3.3 max
Static load (N/mm²)	100 max
Sliding speed (m/s)	0.3 max
Operating temperature (°C)	Up to 300 (alternative specs up to 400)
Coefficient of thermal expansion	19 x 10^-5/°C
Coefficient of friction	0.16
Hardness (HB)	210 min
Tensile strength (N/mm²)	750 min
Elongation (%)	12 min
Density (g/cm³)	8

Tolerances & Fittings (Metric)

	Min	Max	Tolerance
Hole PCD	-	-	140
Thickness Tolerance	9.9	10	-

Frequently Asked Questions

If the answer to your question is not listed below, please feel free to give us a call directly on +44 (0)1235 462500 or email us at sales@bowman.co.uk.

What are Bowman Oilless® thrust washers?

Bowman Oilless® thrust washers are high-strength bronze components designed for high-load, low-speed applications. The WMOW oilless washer range uses specially formed graphite plugs to provide solid lubrication, enabling reliable dry-running performance with reduced maintenance.

What is the difference between a washer and a thrust washer?

A standard washer is generally used to distribute load or protect a mating surface around a fastener. A thrust washer is specifically designed to accommodate axial loads and sliding movement between components. Bowman Oilless® thrust washers are engineered as axial load bronze washers for demanding applications.

What sizes of WMOW washers are available?

The WMOW oilless washer range is available in both metric and imperial sizes. Bowman can also manufacture non-standard dimensions through its in-house machining service to meet specific application requirements.

What axial loads can Oilless® washers handle?

The load capacity depends on factors including washer dimensions, material, operating speed, temperature, and application conditions. As a specialist WMO washer range manufacturer, Bowman can assess your requirements and recommend a suitable dry running bronze washer for the expected axial load.

Can Bowman make custom washer sizes?

Yes. Bowman can produce non-standard sizes to meet specific customer requirements. Our in-house machining capabilities allow us to manufacture customised graphite lubricated washers and maintenance free thrust washer solutions based on your required dimensions and application conditions.

Looking for a custom size or special specifications?

Whether you need standard or custom options, we’re here to help. Reach out now and let’s find the perfect match!

Bowman International Group

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