Heavy-Duty Bearing Unit Covers
Uncompromised operational reliability
In demanding industrial environments, standard bearing end covers often fail — they easily snap off, create safety risks, and allow contamination to ruin bearings. Extreme Bearing Heavy-Duty End Covers are engineered to form a completely enclosed, rock-solid housing unit once assembled, delivering uncompromised operational reliability and workplace safety under severe conditions.
Key features & operational advantages
Ultra-rugged bolt-on design
Standard UC bearing covers pop off easily when bumped. Our covers are securely bolted directly to the housing with hex bolts.
- Zero drop-off: cannot be knocked loose or fall off.
- Impact-resistant: built to absorb heavy industrial mechanical shocks.
Precision O-ring hermetic seal
A precision-machined groove and high-grade O-ring form a complete seal between housing and cover.
- 100% watertight & dust-tight: blocks water, dirt, and grit.
- Active grease barrier: retains lubricant around the bearing to create a protective grease pack.
Safety & environmental impact
Safety first: entanglement prevention
Exposed rotating shaft ends pose severe entanglement risks for operator clothing, gloves, and hair. Installing our heavy-duty end cover creates a completely closed physical barrier, eliminating hazards and ensuring full compliance with industrial safety regulations.
Clean & contaminant-free environment
Without an end cover, centrifugal forces sling thick globs of grease into surrounding machinery and floor areas. The fully enclosed design holds grease inside the housing, maintaining clean surroundings and significantly reducing maintenance cleanup costs.
Eliminate custom safety guard fabrication costs
In practice, many companies spend substantial time and money designing, custom-fabricating, and fitting separate protective guards around standard bearing units to meet safety compliance and protect machinery. With the Extreme Bearing concept, this added expense and effort are completely obsolete. Heavy-duty protection is fully integrated directly into the bearing unit out of the box — saving you valuable engineering hours, custom fabrication costs, and installation lead time.
Smart feature: integrated grease drain port option
To prevent pressure buildup and over-greasing, each cover features a pre-marked drilling locator. This pilot point allows easy, precise drilling on-site or during manufacturing to tap a 1/8″ BSP thread for attaching a dedicated grease drain line — directing old and excess grease safely away from critical components.
Housing & cover compatibility: universal interchangeability
All end covers fit seamlessly across every housing style in the Extreme Bearing line. Furthermore, a single cover design converts effortlessly between open and closed configurations: by simply fitting an open-type seal, it accommodates a through-shaft; by inserting a solid blind seal, the cover transforms into a fully enclosed end cap.
This universal design significantly reduces stock requirements and simplifies spare parts management.
Changing from closed to open cover
Important information for initial greasing if it is a pressure-tight bearing unit
In some configurations, the bearing units from Extreme Bearing are bearing shaft seals pressure-tight. Therefore it is necessary to keep the cap a little bit open while you do the initial greasing. Otherwise problems like in the picture shown here can occur.
In addition, whenever it is necessary to add some more grease later, you should always take care not to create overpressure in the housing. The Extreme Bearing units are pressure-tight when used with the following configurations of seals: AS/AS, AS/VK, CL/CL and CL/VK.
Please inform your maintenance crew about this special service operating instruction. It could be helpful to dismount the grease nipples and exchange them with a standard stainless screw, so it will be impossible to make mistakes.
Ready to build your bearing assembly?
Configure your stainless steel 316 bearing unit — including heavy-duty cover — in the Product Chooser and download the Technical Datasheet (PDF) and 3D STEP model instantly.