ER-35

ER Style Cylindrical OD Bearings Information

FEATURES AND BENEFITS

OUTER RACE WITH TAPERED LANDS
The Sealmaster® ER Bearings Outer Ring is black oxided and comes standard with a locating ring and lubrication groove and lubrication inlet. In addition, they have the Sealmaster patented Tapered Lands bearing race profile which means that critical lubricant is circulated more efficiently, while requiring no regular service intervals. 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 life.

MULTIPLE SEALING OPTIONS

FELT SEAL WITH FLINGER
The standard felt seal provides a tight labyrinth seal which retains lubrication and 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.

SEALMASTER SKWEZLOC® CONCENTRIC LOCKING COLLAR
SKWEZLOC is a concentric locking collar clamp design that results in near perfect concentricity of the shaft to the bearing bore and maintains near perfect ball path roundness, while reducing 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® Plus head cap screw that outlasts stripping 12 times longer than hex head cap screws. The Skwezloc locking collar has been redesigned to accommodate “Commercial” grade Turned and Polished (T&P) shaft tolerances with improved lock reliability on Turned, Ground and Polished (TG&P) shaft tolerances. The new design has been a rolling implementation beginning in 2017 continuing through 2018.

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 oxided zone hardened inner race results in improved lock reliability as a result of less distortion at the setscrew location and improved thread conformity resulting in improved clamping and resistance to setscrew back-out.

LAND RIDING RETAINER
The Sealmaster unique land riding metal retainer design provides superior pocket clearance allows for 360° oil circulation around the rolling elements resulting in better retained and utilized lubrication. 

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 Bearing engineers have developed custom solutions to meet the varying severity, operating parameters and maintenance regularity, such as ERX-TREME and Custom Select.

ERX-TREME LOW DRAG “LO” 
• Felt seal cut down to reduce drag
• Provides excellent barrier that works to retain grease and acts as a filter to reduce the ingress of debris contaminants
• Features a channeling grease that reduces drag while lubricating the bearing 

ERX-TREME X-TRA LOW DRAG “XLO” 
• Felt seal cut down and oil soaked for extra low drag
• Oil lubricated

ERX-TREME HIGH TEMPERATURE ""HI"" 
• High temperature bearing with increased internal clearance to accommodate thermal expansion of components
• High temperature Nomex seal* and Krytox*-226 grease 

ERX-TREME EXPANSION - HIGH TEMPERATURE ""HIY"" 
• Expansion type HI Temperature utilizes a half-dog setscrew combined with a lock wire and is recommended for applications that require expansion capability.
• High temperature bearing with increased radial internal clearance to accommodate thermal expansion of components 
• High temperature Nomex seal and Krytox*-226 grease
• Specify as ERX-xx HIY
This may be essential when shafts grow in length due to temperature changes. The single half-dog setscrew has a cylindrical nub that protrudes out of the bottom of the setscrew. The nub is used to mate loosely with a slot milled into the shafting. As the shaft spins, the nub interferes with the slot and positively turns the inner ring. See HIY installation instructions.

Note: All expansion bearings must be used in conjunction with a fixed bearing to stabilize the system.

KRYTOX EXTENDED LUBE GREASE
• Used in HI and HIY suffix modified bearings
• KYRTOX GPL 226, an extremely high performance perfluorinated oil and PTFE thickened grease
• KRYTOX grease has a superior service life and therefore diminishes re-lubrication frequency and extends life
• Engineers have found that, compared to other high temperature greases, the thermal stability and lubricity of the KRYTOX can improve high temperature bearing life by a factor of 4 to 45 times

HIGH CONTAMINATION “DRT”
Heavy Duty Multi-Lip contact seal (depending on size and series, either supplied with “2C” double lip or “3C” triple lip seal), 100% Grease Fill with Sealmaster GoldPlex HP Grease."