How to find the right Bearing Isolators AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Bearing Isolators
- Shaft diameter and housing bore
- Order to the exact measured shaft OD and housing bore, plus the available axial space from bearing to housing face Isolators are machined to fit; a mismatch prevents installation or causes rubbing on the rotor.
- Non-contact labyrinth design
- Prefer non-contact rotor/stator labyrinth designs over contact lip seals for long service life Non-contacting designs don't wear the shaft and keep lubricant in and contaminants out for years rather than months.
- Drain/expulsion port orientation
- Install with the drain port at the bottom (6 o'clock) unless the design is specified for any orientation Misoriented isolators can't expel contaminants or return oil, defeating the seal.
- Speed and axial shaft movement
- Check rated surface speed and allowable axial float and misalignment against the equipment Pumps and motors with end float or high speed need isolators designed to tolerate it.
- Material for the environment
- Bronze for general industrial, stainless for washdown, food or corrosive service; PTFE-based for chemical exposure Corrosion or galling of the isolator body shortens life in harsh plants.
Brands that matter
- Inpro/Seal: Originator of the bearing isolator category and widely used on pumps and motors.
- AESSEAL: LabTecta family of bearing protectors for rotating equipment.
- Garlock: ISO-GARD bearing isolators for industrial pumps and gearboxes.
What to avoid
- Generic isolators without published shaft, bore and speed specs
- Installing over a damaged or scored shaft without repair
- Choosing a contact lip seal where repeated seal failures are already the problem
Questions
Do I need a split isolator?
Choose split designs only when the equipment can't be uncoupled to slide a solid isolator over the shaft end; solid units are simpler and usually seal better.