SEG 432 2 20 01 AA LM

SEG Double row ball external gear slew rings
  • SEG Double row ball external gear slew rings
  • SEG Double row ball external gear slew rings

SEG 432 2 20 01 AA LM-SEG Double row ball external gear slew rings

Designed for demanding medium-to-heavy load rotary applications, this standard double-row ball external gear slewing bearing delivers enhanced mechanical stability and integrated drive performance. Adopting a dual-ball raceway layout and outer-tooth transmission structure, the component overcomes the load limits of conventional single-row slewing bearings. It balances outstanding carrying capacity, precise rotary motion and simplified mechanical matching, making it a versatile core component for engineering, logistics and general industrial rotary machinery.


Typical Applications:

Large cranes and excavators

Tower cranes and mobile cranes

Wind turbine yaw and pitch systems

Large solar tracking arrays

Radar and antenna positioning systems

Heavy-duty industrial turntables


High load-carrying capacity
Resistance to high and low temperatures
Noise-free operation
Strictly controlled tolerances and appropriate internal clearance
Long service life and low maintenance requirements
Prevention of unexpected downtime (avoiding bearing fracture, seizure, and safety incidents caused by such failures, with anti-tilting capability)

Dimension and Parameters

SEG Double row ball external gear slew rings
Type :SEG 432 2 20 01 AA LM
Brand :LYMC
Outline Dimension
Da [mm] :432
Di [mm] :224
H [mm] :92
Outer Holes
La [mm] :360
na :16
Inner Holes
Li [mm] :254
ni :16
Gear Information
P [mm] :420
M :6
Z :70
FzMax :40
Weight
KG :51

Characteristics

✦ Double-row ball configuration – Two independent rows of balls positioned in a staggered layout to maximize load distribution across a wide bearing footprint.

✦ External gear on outer ring – Gear teeth are case-hardened and precision-machined on the outer ring circumference for direct pinion engagement.

✦ Single-block raceway design – Both ball rows run in a one-piece raceway profile machined from a single ring blank, eliminating welded or bolted joints.

✦ Through-hardened gear teeth – Gear teeth are hardened to 45–50 HRC with a hardened depth of 1.5–2.5 mm for superior wear resistance.

✦ Dual-lip seal system – Each ball row is sealed independently with a double-lip NBR seal on both sides for enhanced contamination protection.


Features

✦ Enhanced overturning stiffness – Dual-row ball arrangement with optimized raceway curvature delivers superior rigidity under high tilting moments.

✦ Smooth high-load rotation – Precision-ground external gear teeth ensure quiet, low-vibration engagement even under variable torque conditions.

✦ Modular seal options – Available with either standard NBR or optional high-temperature seals to match specific operating environments.

✦ Simplified field service – Split-design seal housings allow quick lubrication replenishment without removing the bearing from the machine.

✦ Interchangeable mounting interface – Bolt-hole patterns are designed to match industry-standard dimensions for easy replacement of existing units.

✦ Proven corrosion protection – Specialized coating options (e.g., zinc-rich primer or epoxy) provide extended protection in coastal or chemical environments


Further Reading