Bearing type – Single-row ball slewing ring with external gear on outer ring and integral inner ring flange.

Gear specification – External spur gear, module 4–10, 20° pressure angle, tooth flanks induction hardened.

Flange design – Inner ring incorporates a flange with alternating threaded and clearance holes on the bolt circle.

Raceway profile – Modified Gothic-arch raceway with 50° nominal contact angle for improved moment stiffness.

Heat treatment – Raceways induction hardened to 58–62 HRC, case depth 2.5–3.5 mm; gear teeth hardened to 50–55 HRC.

Sealing system – Dual lip seals on both sides, with a grease relief valve to prevent over-pressurization.

Enhances gear durability – The 50° contact angle reduces tooth flank pressure, extending gear life under heavy loads.

Simplifies hydraulic integration – The flange design allows direct mounting of hydraulic motors without intermediate adapters.

Prevents over-greasing damage – The integrated relief valve prevents seal blow-out during relubrication.

Accommodates higher tilting moments – The modified raceway profile provides increased resistance to overturning forces.

Reduces bolt inventory – Alternating thread/clearance holes accept either bolt type, simplifying stocking.

Supports retrofitting – Customizable bolt circles allow direct replacement of older bearings without machine modification.