Bowman

WMU Wrapped PTFE Lined Bearings – DU

Bowmans Range of PTFE lined wrapped bearings is suitable for dry running, low friction, low wear applications. These wrapped bearings have excellent sliding characteristics forming a transfer film that can protect the mating metal surface.

Their PTFE lined wrapped bearings have been developed for high duty applications such as:

• Automotive suspension struts
• Shock absorbers
• Hydraulic cylinders
• Gear pumps and motors
• Axial and radial piston pumps and motors
• And many other applications

The Bowman range of PTFE lined wrapped bearings come in metric plain, imperial plain, metric flanged, metric washers, imperial washers, metric strip and imperial strip. Special sizes can be produced to customer requirements. Equivalent alternative brands include: Glacier Garlock DU, P10, P14

Structure

• A lead-free polymer fibre mixture provides an initial transfer film which effectively coats the mating surface of the bearing assembly, forming an oxide-type solid lubricant film
• Sintered bronze powder provides maximum thermal conductivity away from the bearing surface and also serves as a reservoir for the PTFE mixture
• The steel backing provides a high load-carrying capacity which provides the wrapped bearings with outstanding heat dissipation
• The copper/tin plating provides excellent corrosion resistance
• These are versatile and extremely durable wrapped bearings and can be used in many applications.

WMU-B & WMU-SS Bronze Backing Strip

In addition to the standard steel-backed, PTFE lined wrapped bearings we also offer our WMU-B and WMU-SS range with a bronze or stainless steel backing strip for applications where the standard steel is not suitable. Range, dimensions and tolerances are exactly the same as the standard PTFE lined wrapped bearings.

Bowmet-High Performance DU

Bowmet, by Bowman, is the biggest advance in plain bearings in more than 70 years, compared to standard DU bushes Bowmet delivers:

• Higher Load Carrying Capacities
• Increased Heat Resistance
• Increased Speeds
• Beter Corrosion Capabilities
• Increased Service Life & Reduced Down Times

These heavy-duty bearings have been developed using ToughMet® material and with a static load of 820 N/mm2 and an impressive PV factor of 9.6, these heavy-duty bearings are ideally suited to a wide range of harsh industrial applications including:

• Aerospace & Defence
• Mining & quarrying
• Heavy construction
• Motorsport
• Offshore oil & gas
• Marine

The ToughMet material resists saltwater corrosion, hydrogen embrittlement and chloride stress- corrosion cracking better than most copper alloys. Indeed, in some sulphide environments, the corrosion rate is comparable to stainless steel and nickel alloys.

The capacity to deliver increased reliability, reduced downtime, lower maintenance costs and ultimately fewer warranty claims mean that BowMet range of heavy-duty bearings really is nothing short of a revolution in bearing design and capability.

Bowman Sintered Bronze Bearings

Bowman has been acknowledged as the undisputed market leader in self-lubricating bearings for almost 80 years and today sets the standard for other products with its quality and reliability. The extensive technical knowledge and manufacturing resources behind Bowman have resulted in a vast array of sophisticated, high-quality components that are supplied to a wide range of industries, throughout the world.

Material Choice

Bowman Sintered Bronze Bearings are manufactured in three standard materials. Standard Sintered Bronze oil retaining tin bronze is the generally specified material. It gives a good balance between strength, wear resistance, conformability, and durability in operation. Ideal in a wide variety of applications where self-lubricating properties are required over a long period of time.

Bowman Super is an iron copper material suited to high static loads and slow oscillatory motion.

Bowman Iron are 100% iron oil-retaining bearings that provide an ideal solution in high-stress low revolution applications.

Please Contact CGB for further technical details.

Bespoke Bearings

Bowman also specialises in machining sintered bronze, self-lubricating bearings and plates to meet individual specifications and tolerances. This service provides, for example, one-off requirements in machine maintenance or limited production runs in the OEM design field or for prototype testing before committing to tooling. Specialist tools and machining techniques are employed. This maintains the performance characteristics and physical properties which are the prerequisite of these components.

Range:

• Plain
• Flanged
• Cored Bars
• Bars
• Circular Plates and Discs
• Sintered Plates
• Spherical Bearings
• Thrust Washers

WMX® Bearings – Wrapped Acetal Lined Bearings

The WMX range of wrapped acetal lined bearings is suitable for rotary and oscillating movement applications. They benefit from long re-lubrication intervals, no absorption of water, outstanding damping behaviours and have a low susceptibility to edge loading.
The WMX range is ideal for the automotive, machine building and agricultural industries and indeed any application where lubricant cannot be supplied continuously.

Just a few examples of where our WMX range is used are as follows:

• Rear chassis hinges
• Articulation joints
• Spindles of drills
• Gearboxes & clutches
• Grinding and milling machines

Structure

• WMX wrapped acetal lined bearings have a high wear resistance and low friction even with very small quantities of lubricant
• The surface carries a pattern of circular indents which should be filled with grease on assembly
• Low carbon steel gives exceptionally high load carrying capacity and excellent heat dissipation

The WMX range of wrapped acetal bearings can hugely reduce maintenance costs on projects large and small and are stocked in metric plain, imperial plain, metric washers. Imperial washers, metric strip and imperial strip.

WMO Bowman Oilless® – Oilless Bearings

The WMO range of oilless bearings is the perfect solution for projects where lubrication cannot easily be provided or where conventional lubricants may carbonise. The design of oil feeding systems is time-consuming and expensive – The use of our oilless bearings can greatly reduce costs of maintenance and oil as it removes any need for such a system.

Bowman Oilless bearings have been developed for high load, low-speed applications and are made of rotational cast high-strength bronze using a specially formed graphite plug as a lubricant.

Their oilless bearings are graphite loaded and can withstand temperatures of up to 400°C (800F) as well as cryogenic temperatures down to -200°C (-400°F) depending on which material is selected.

Typical applications include, but are by no means limited to:

• Kilns
• Dryers
• Injection moulding machines
• Dust collectors
• Louvres
• Hot conveyors

Bowman oilless bearings benefit from outstanding chemical and corrosion resistance. The lubricant used in these bearings is formed from abrasion resistant materials (such as graphite, PTFE etc) and has a stabilised molecular structure.

These oilless bearings are suitable for dry environments where contamination is a risk, wet applications where there is high humidity and applications where the bearing is in an inaccessible location. Bowman Oilless bearings are lubricated for life!

WMB® Bearings – Bronze Wrapped Bearings

The 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.

The WMB range can take 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.

Structure

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.

SWB Bearings – Wrapped Standard Bearings

The Bowman range of Standard Wrapped Bearings (SWB) are steel-backed and lined with sintered bronze. This range is extremely tough and versatile and available in metric and imperial sizes. SWB bearings are suitable for a wide range of general-purpose and heavy-duty applications and can be lubricated with either oil or grease.

WMG® Bearings – Thermoplastic Bushes

The WMG range of plastic bearings can be used across a wide range of applications and industries.

These thermoplastic bearings are suitable for applications requiring high abrasion resistance in atmospheres where dust or other particles are a constant problem. The WMG range has a very low level of dynamic friction and almost zero stick-slip characteristics.

Bowman can also offer bearings manufactured in many different types of plastic material to suit various applications and can be machined or moulded depending on the quantities required.

Bowmax Filament Wound Composite PTFE Bearing

BowMaxTM is a long life, high strength self-lubricative bearing which uses continuous fibreglass, PTFE and Polyester filaments incorporated into a special epoxy resin matrix. This filament wound composite is very high strength and is naturally concentric with no seam or overlap. The high strength laminate construction allows for a thin wall bearing, which can reduce the size and weight of the assembly. The resulting bearing exhibits a very low coefficient of friction coupled with high load- bearing capacity.

Lubrication

After a very short time, a film of the PTFE will transfer from the bore of the bearing onto the shaft. No lubrication is required, however, if some lubricant can be provided, the life will be extended – adding protection against the ingress of contaminants

• High Load Capacity
• Good for Shock Loads
• Non-Corrodible
• Good for Contamination Resistance
• Good Chemical Resistance
• Tolerates Edge Loading
• Low Friction
• Low Wear Rate
• Withstands Misalignment
• Excellent for Vibrations
• Meets RoHS Requirements
• Intrinsically Safe
• Lowers Cost of Maintenance
• Large Temperature Range

Bowman Split Bearings

KEY FEATURES AND BENEFITS

• Significantly increases axial load capacity in both directions Faster bearing changes for reduced downtime
• Mounts into existing pedestal or other housing type
• 30mm to 300mm (1 3/16 in. to 12 in.) shaft diameters Larger sizes manufactured to order
• Dimensionally interchangeable
• Cover both the S1/01/LSM/LSE and S2/02/MSM/MSE variants
• Patented 3D printed cages
• Requires less lubricant
• 2D drawings and 3D models available
• Patented triple labyrinth extended seal for extending the life of worn shafts

BESPOKE BEARING DESIGN

Do you need a bearing with bespoke application specific design adaptations or performance characteristics?

CGB work with Bowmans dedicated team of design engineers to create a performance-driven advanced bearing product specifically for your project.

Thanks to their sister division Bowman 3D, they can can create prototypes quickly and cost effectively, bringing your bespoke advanced split roller bearing product to life within a short timeframe.