Conveyor pillow
block bearings

Determine if your conveyor uses a round bore or a hex bore bearing.

For a round bore, use calipers to measure the inside diameter directly across the bore. For a hex bore, place the calipers in one corner, skip a corner, and measure across to the next corner (leaving one corner in between).

Compare your measurement to common pillow block bearing sizes and bolt configurations.

Measure your mounting surface to confirm compatibility:

• Base to center height (H dimension): The distance from the mounting base to the shaft centerline.

• Housing footprint and bolt hole spacing (J and L dimensions).

• Base bolt size: Verify slot and bolt diameter match your pedestal or frame.

• Set screw lock: Common locking for standard-duty applications.

• Eccentric locking collar: Positive binding that resists loosening under vibration. Preferred for heavy-duty applications and higher speeds.

• Standard contact seals for normal conditions.

• Triple lip seal for heavy dust environment applications, like aggregate and recycling.

• Bearing isolator options for extreme contamination in transfer stations and load zones.

For corrosive or washdown environments, specify stainless housing and stainless insert combinations. For extreme temperatures, verify temperature range compatibility.

Select wide inner ring inserts for higher dynamic load rating requirements. Determine if you need relubricatable units with grease fittings or pre-lubricated sealed-for-life options.