​​​​​​​​​​​​​​​​​​​​​​​​Housing Styles
Pillow Block, Flanges, Hanger, Take Up, and ER Style

Locking Styles
Setscrew , Concentric, and Eccentric

Bore Diameter Size Range
1/2″ to 4 15/16″
20 to 100 MM

Housing Materials
Cast & Ductile Iron, Stamped Steel

View specifications

Wide Outer Ring
Sealmaster has the industry’s widest outer ring. The black oxide outer ring is 20% to 30% wider than industry standard outer rings. This feature results in increased grease capacity, and room for improved sealing options. A wider outer ring has increased surface area contact with the housing to better absorb shock load.

Lock Pin and Dimple
The Sealmaster® exclusive locking pin and dimple system provides a direct lubricant path into the bearing cavity and ball path, instead of around a lubrication groove. The pin also prevents outer ring rotation (sometimes referred to as “creep”), and allows ±2° static misalignment of the bearing insert.

Multiple Sealing Options

Felt Seal with Flinger
The standard felt seal provides a tight labyrinth seal which retains lubrication. The felt seal also acts as a filter to exclude contamination. The external stamping is a flinger which shields the felt from large contaminants and directs them away from the sealing surface. The design operates with less drag and less heat generation than rubber contact seals.

Single Lip Contact Seal
Single Lip Contact Seal consists of a nitrile rubber washer in metal shroud to shield the lip from large contaminants. The seal is designed to balance drag and protection in wet and dry environments. This can be specified by adding the suffix C to the part number.

Multiple Locking Methods

Setscrew Locking
120° spaced, balanced three point contact minimizes inner ring distortion vibration, reduces noise, and improves reliability. Precision manufactured diamond faceted setscrews contribute to improved clamping and resistance to back out.

Skwezloc^® Concentric Locking Collar
SKWEZLOC is a concentric collar clamp design that results in near-perfect concentricity of the shaft to the bearing bore. It also provides near-perfect ball path roundness and reduces fretting corrosion. This design eliminates the shaft damage of setscrew locking, and minimizes bearing induced vibration for smoother quieter operation. The collar has a TORX head cap screw that outlasts stripping 12 times longer than hex head cap screws.

Zone Hardened Inner Race
Sealmaster incorporates a unique heat treat process that hardens the inner race only where it is needed, under the ball path. The black oxide zone hardened inner race provides improved lock reliability due to less distortion at the setscrew location. Additionally, improved thread conformity results in better clamping and resistance to setscrew back-out.

Land Riding Retainer
The Sealmaster unique land riding metal retainer design provides superior pocket clearance. This allows for 360° grease circulation around the rolling elements. It also results in better retained and utilized lubrication. The land riding design of the retainer minimizes wear on both Ball and retainer while maximizing stability. This is especially important in applications involving vibration, shock loading, or high operating speeds.

Solid Base
Solid bases are standard on Sealmaster Gold ball bearing pillow blocks. The solid base provides improved stability as well as resistance to shock and vibration. This prevents frame buckling under base compared to semi-solid and hollow mounting bases.

Housing Fit
All bearings are assembled with a controlled housing fit between the bearing outer ring and housing bore. This fit allows the bearing to properly self-align in common industrial applications. Special fits are available based on your specific application need.

Nameplate
Metal nameplate riveted to the housing allows for easy identification even after years of operation.

Sealmaster Gold Mounted Ball Bearing Options
Bearings are typically selected using L10 fatigue life calculations based on ideal operating conditions. However, most bearing problems are not fatigue related, but occur due to contamination, lubrication starvation, or other environmental issues. As a result, our engineers have developed custom solutions to meet a variety of operating conditions. Some of these solutions are Reduced Maintenance and Custom Select.

Reduced Maintenance “RM”
Sealmaster Reduced Maintenance bearings are the result of a patented Tapered Lands bearing race profile. This means that critical lubricant is circulated more efficiently. No regular service intervals are required. The bearing are supplied from the factory with a plug instead of a lubrication fitting.

The outer land surface in a conventional bearing is parallel to the axis of the inner ring. The Tapered Lands surface is tapered in a radial direction toward the bearing race. This subtle yet crucial design change allows lubricant to more easily flow back to the raceway. With improved bearing lubricant circulation comes significantly longer bearing service life. This improved circulation and service life comes without any reductions in bearing radial or thrust capacities.

* For bearings that are maintained and relubricated on a regular basis, there is no significant difference in expected service life.

Custom Capabilities
Our Application Engineers are able to design a bearing based on your unique application parameters. They utilize a variety of existing components or special components. Using the expertise of our application Engineers provides a product solution to meet your needs. These are offered to maximize bearing performance in your specific application.

Many customers benefit from this capability every year. Now you no longer have to endure the lead time associated with these custom engineered solutions. In many cases, a higher performance product can be designed and developed specifically for your application.