Rotation (Slew) Bearings

Rotation Applications


Compact ductile housing

Worm gear on worm gear bearing (no helical gears)

Taper roller bearing pre-load with bearing nuts (no shims)

Various ratios and sizes

Engineered to customer's application

Direct SAE motor mount input (with or without hydraulic motor)



PTS Bearings are four-point contact slewing rings with induction hardened, offset raceways. Balls are chrome-alloy steel and separated by spacers to prevent ball-to-ball sliding friction. Standard PTS slewing rings are perfect for general purpose use in medium to heavy-duty applications.


With or without external/internal gear teeth

PTS standard bearings (4-point contact)

PTS heavy duty bearings (25-30% higher rated-same physical size)

Induction hardened, offset raceways

Optimized cost with proven design

Robust components for long life

Outside diameter (10"-118" Dia.)

Moment load rating (10-800,000 Ft. Lbs.)

Engineered to customer's application


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