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How to choose sealing and load class in Thrust Ball Bearing
Choose the seal for the contamination at the bearing position first, then the series for the load and duty cycle. Most early failures on conveyors come from a seal that does not match dust, water or washdown, not from the bearing itself.
1. Seal for the environment
Heavy dust and fines: multi-lip seals, flingers or extra shielding
Wet or washdown areas: seals that keep water out of the grease
Clean, dry positions: standard contact seals keep friction low
2. Series for the load
Light and medium shafts: ball bearing pillow block units
Heavy drive and pulley shafts: spherical roller bearing units
Shock loads and 24/7 running: size up for service life
3. Upgrade repeat failures
Same position failing again: review seal and series together
Check these dimensions so the unit fits your frame
Shaft diameter alone does not guarantee fit. A unit with the right bore can still miss the frame if the bolt spacing, centre height or take-up slot differs from the old one.
01Shaft diameterMeasure the shaft at the bearing seat, not the worn section.
02Bolt hole spacing and mounting typePillow block, flange or take-up — note centre-to-centre of the bolt holes.
03Shaft centre height and locking methodSet screw, eccentric collar or adapter sleeve affects replacement.
04Photos of unmarked unitsSend photos with measurements and the matching unit is identified for you.
These units serve conveyor and transmission positions in mines, ports, cement plants, aggregate sites and logistics centres running heavy, dusty, continuous duty.
"We ordered a bulk set of conveyor pulley bearings plus general machinery bearings for our annual shutdown project. Every reference matched our specification, the shipment arrived ahead of the outage date, and our maintenance team completed the job on schedule."
Sergey PetrovUral Cement Plant, Russia
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