WMB® bearings - Bronze Wrapped Bearings


WMB® Bearings

Our range of WMB bronze bearings manufactured from CuSn8 rolled phosphor bronze alloy material is extremely versatile and well suited for a wide range of applications. These bronze bearings have been developed for slow speed, high load applications, especially suited for oscillating motion and are perfect for the construction, mining/quarrying, agriculture and automotive industries.

Our WMB range is capable of taking axial as well as radial loads and have outstanding resistance against saltwater and corrosion cracking and most importantly; are much more cost-effective than machined, roller or ball bearings.


The WMB ranges are made entirely of CuSn8. The working surface is rolled with diamond indentations or stamped with oil grooves. On assembly or during operation the indentations can be filled with grease or oil which acts as a reservoir creating excellent long term lubrication.

The bronze bearings are produced from phosphor bronze alloy rolled strip which is hard and has an excellent finish. The material composition is as follows:

Cu - Balance

Sn - 8.5%

P -   0.2%

The WMB range is another extremely versatile range. Please feel free to get in touch with us to discuss your specific project requirements. The bronze bearings can be offered with pockets, grooves or thru-holes for heavier applications.

Structure CuSn8 bronze with either grease pockets or holes
PV (N/mm² x m/s) 2.8 max
Static load (N/mm²) 120 max
Dynamic load (N/mm²) 40 max
Sliding speed – With Grease (m/s) 2.5 max
Intermittent temperature (°C) 130 max
Operating temperature (°C) -100 to 200
Thermal Conductivity (W/mk) 60
Coefficient of friction 0.08 to 0.25
Hardness (HB) 90-120
Tensile strength (N/mm²) 450 min
Yield point (N/mm²) 250 min
Elongation (%) 40

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