Details
| Inner Diameter | 5 |
| Outer Diameter | 7 |
| Length | 5 |
| Backing Material | Bronze |
| Flange Thickness | 1 |
| Flange Diameter | 10 |
Material Specification
| Structure | CuSn8 backing strip with sintered bronze & PTFE layers. |
|---|---|
| Max PV – Dry (N/mm² x m/s) | 1.8 |
| Max PV – Oiled (N/mm² x m/s) | 2.8 |
| Max Static load (N/mm²) | 250 |
| Max Dynamic load (N/mm²) | 140 |
| Max Sliding speed – Dry (m/s) | 2.5 |
| Max Sliding speed – With Oil (m/s) | 5 |
| Operating temperature (°C) | -200 to 280 |
| Thermal Conductivity (W/mk) | 42 |
| Coefficient of friction – Dry | 0.02 to 0.20 |
| Coefficient of friction – With Oil | 0.02 to 0.15 |
| Recommended shaft finish (Ra) | 0.04 max (N5) |
| Recommended shaft hardness (HB) | 200 min |
Tolerances & Fittings (Metric)
| Min | Max | Tolerance | |
|---|---|---|---|
| Inside Diameter When Fitted | 4.99 | 5.055 | - |
| Recommended Housing Size | 7 | 7.015 | H7 |
| Overall Length | 4.75 | 5.25 | - |
| Shaft Diameter | 4.978 | 4.99 | - |
| Inside Chamfers | 0.1 | 0.5 | - |
| Outside Chamfers | 0.2 | 0.8 | - |
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 WMUB® bronze backed flanged bearings?
WMUB® bronze backed flanged bearings are self-lubricating composite bearings designed to support both radial and axial loads. They feature a bronze backing, a porous sintered bronze layer, and a low-friction PTFE sliding surface, providing excellent wear resistance, high load capacity, and maintenance-free performance in demanding industrial applications.
When should I use bronze backed bearings instead of steel backed?
Bronze backed bearings are recommended for applications involving higher loads, greater structural demands, or corrosive operating environments. Compared with steel-backed bearings, bronze offers improved compressive strength, enhanced fatigue resistance, and better corrosion resistance, making WMUB® bearings ideal for heavy-duty, marine, offshore, and industrial applications.
Do WMUB® flanged bearings need lubrication?
No. WMUB® flanged bearings are designed for dry-running operation. Their PTFE sliding layer provides low-friction performance without the need for continuous lubrication, helping reduce maintenance requirements while delivering reliable, long-lasting operation.
What sizes of WMUB® flanged bearings are available?
Bowman supplies WMUB® flanged bearings in a comprehensive range of standard metric and imperial sizes. This wide selection supports a variety of industrial applications while ensuring fast availability for OEM production, maintenance, and replacement requirements.
Can I order custom WMUB® flanged bearing sizes?
Yes. Bowman offers an in-house machining service to manufacture WMUB® flanged bearings in bespoke dimensions. Custom internal diameters, external diameters, flange sizes, and lengths can be produced to meet the specific requirements of OEMs, replacement applications, and specialist engineering projects.
