Bearing Seals

The seal is critical to bearing life.

A misapplied seal can actually diminish bearing life, leading to premature equipment failure and costly repairs. Applied properly, a bearing seal will extend bearing life and save money by reducing downtime and maximizing uptime. Bearing seals range from a simple seal ring (LER) design to both advanced-contacting and non-contacting type sealing arrangements.

A proper seal will surround the shaft, retain lubricant internal to the bearing assembly, and exclude foreign debris from the housing.

Miether provides a variety of seals to accommodate the split pillow block SAF series, solid pillow block MMW series, and flange cartridge block FCL/FCS series housings. They are available in fractional and metric dimensions, and can be customized for special applications. Materials of construction for hard parts are typically steel, aluminum, and stainless steel. Soft parts are made from Buna N and Viton.  

Nomenclature for these products are as follows (starting with the highest performance):

Miether Exclusive: Protector® Seal

The Protector® is an engineered steel design featuring precision double-wound stainless steel laminar rings for ultimate protection against contaminates, abrasives, and moisture.

• Staggered laminar rings do not rub or damage the shaft surface
• No components to wear or replace
• No additional lubrication required after initial assembly/installation
• Available in low speed (<2000ft/min) or high speed (>2000ft/min) designs
• Sizes 2-1/2” to 10” standard
• Custom designs and sizes available

Taconite V Seal Ring

TERV (Taconite Engineered V- Ring) features three seals in one retainer, one of which is “V” because it acts as a mechanical seal. It is most commonly used in dusty, abrasive and moist environments.

• Outboard contact seals on shaft
• Purgeable grease cavity to flush out contaminants
• Inboard felt seal
• Can be used with pressurized oil systems
• Sizes 2-1/2” to 18-1/2” standard
• Custom designs and sizes available
• Dimensioned  as a drop in replacement for LER style rings

Taconite Seal Ring

TER (Taconite Engineered Ring) is a specialty seal featuring three seals in one retainer. Used in dusty, abrasive, and moist environments, the Taconite seal has unique characteristics that prevent contaminants from entering the assembly.

• Outboard contact seals on shaft
• Purgeable grease cavity to flush out contaminants
• Inboard felt seal
• Can be used with pressurized oil systems
• Sizes 2-1/2” to 18-1/2” standard
• Custom designs and sizes available
• Dimensioned  as a drop in replacement for LER style rings

Triple Seal Ring with O-ring or LER-O-ring

• O-ring provides better sealing between the shaft and seal ring
• One piece rotating labyrinth seal
• Close running tolerance between shaft and housing surfaces
• Provides protection from contaminants
• Provides grease or oil retention
• Materials of construction aluminum and steel
• Sizes 2-1/2” to 18-1/2” standard
• Custom designs and sizes available

Triple Seal Ring Split or Split LER

• Split seal for split pillow blocks allows for ease of installation and replacement (no shaft removal necessary)
• One piece rotating labyrinth seal
• Close running tolerance between shaft and housing surfaces
• Provides protection from contaminants
• Provides grease retention
• O-ring style is an available option
• Materials of construction aluminum and steel
• Sizes 2-1/2” to 18-1/2” standard
• Custom designs and sizes available

Triple Seal Ring or LER (Labyrinth Engineered Ring)

• Standard seal on split pillow blocks
• One piece rotating labyrinth seal
• Close running tolerance between shaft and housing surfaces
• Provides protection from contaminants
• Provides grease retention
• Materials of construction aluminum and steel
• Sizes 2-1/2” to 18-1/2” standard
• Custom designs and sizes available
  

Miether Bearing Products will minimize downtime and make the most of your bearing investment. As a leading manufacturer of specialty bearing housings, seals, and accessories designed to maximize your bearing life our goal is to:

• Minimize downtime with maintenance friendly features
• Increase bearing life with rugged , sturdy construction
• Maximize your uptime with 50% faster delivery on new and repaired products through our Optima™ Program

Visit our resources section to download product literature.

Save the Bearing. Start with the Housing.

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