FIG 648 20 61 AA LM

FIG Flange bearing
  • FIG Flange bearing
  • FIG Flange bearing
  • FIG Flange bearing
  • FIG Flange bearing

FIG 648 20 61 AA LM-FIG Flange bearing

The internal gear with outer flange slewing bearing is a purpose-designed rotational component that addresses the needs of machinery requiring a protected drive interface and a straightforward mounting solution. This configuration features an internal gear on the inner ring and an outer flange on the outer ring, offering a practical balance between gear protection, space efficiency, and installation convenience.



Application Areas

  • Compact crane turntables and winch drives

  • Aerial work platforms and lifting equipment

  • Solar tracking systems requiring protected gearing

  • Light to medium-duty industrial turntables

  • Packaging and handling machinery

  • Equipment requiring internal drive arrangement and flange mounting



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

FIG Flange bearing
Type :FIG 648 20 61 AA LM
Brand :LYMC
Drawing No. :648
Outline Dimensions
Da[mm] :447
Di[mm] :542
U[mm] :540
C[mm] :584
da f9[mm] :619
di h9[mm] :10
Outer Holes
La[mm] :499
na :15
φa :457
Inner Holes
Li[mm] :4
ni :72
φni :7883
Weight
[KGS] :90
Related Types :RKS 22 N1Z

Characteristics

  • Combined load capability: Handles axial, radial, and tilting moment loads simultaneously

  • Integrated outer flange: Simplifies mounting and reduces component count

  • Protected gearing: Internal gear teeth are shielded from external contamination and damage

  • Space-saving design: Allows the drive pinion to be positioned within the bearing envelope

  • Rigid connection: Flange provides direct, stable load transmission

  • Smooth rotation: Optimized raceway geometry ensures consistent, reliable motion


Features

✦ Boosts torsional rigidity – The outer flange provides a broad clamping surface that resists rotational deflection under high torque.

✦ Enables quick service access – Externally positioned bolts allow fast torque checks and retightening without dismantling surrounding components.

✦ Provides gear concentricity – Internal gear teeth are finish-ground after flange machining, ensuring accurate runout control.

✦ Permits central utility routing – The open inner ring serves as a passage for hydraulic hoses, electrical harnesses, or cooling lines.

✦ Reduces seal extrusion risk – The flange-mounted design maintains stable seal gap dimensions under load, preventing lip distortion.

✦ Evenly transfers loads – The wide flange footprint distributes forces across the support structure, reducing peak stress.


Further Reading