022.50.2500

112 External Gear
  • 112 External Gear
  • 112 External Gear

022.50.2500-112 External Gear

The 112 series is a single-row crossed roller slewing bearing featuring an external gear on the outer ring. This series is designed for applications that require high rotational accuracy, compact dimensions, and reliable combined load support. The crossed roller configuration offers superior rigidity and precision compared to traditional ball bearings, making it an ideal choice for applications where accuracy and stability are critical.



Typical Applications:

Robotics and automation equipment

Precision rotary tables and indexing systems

Radar and antenna positioning systems

Medical equipment such as CT scanners and radiotherapy devices

Solar tracking systems requiring high pointing accuracy



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

112 External Gear
Type :022.50.2500
Brand :LYMC
Overall Dimension
Da[mm] :2820
D[mm] :2715
di[mm] :2285
H[mm] :190
Installation Dimension
La[mm] :2649
Li[mm] :2351
n1 :56
n2 :56
φ1 :33
φ2 :33
Structure Dimension
b :120
h :47
B :178
C :143
Di :2462
da :2468
Teeth Information
m :20
z :138
x :0.5
Rated axial static load :11100
Weight :1500

Characteristics

✦ Single-row crossed roller configuration – Cylindrical rollers are arranged alternately at 90° in a single row, with each roller contacting both raceways simultaneously.

✦ External gear on outer ring – Gear teeth are integrally machined on the outer ring circumference, featuring a spur tooth profile with induction-hardened flanks to 50–55 HRC.

✦ Monobloc ring construction – Both inner and outer rings are manufactured as single-piece forgings, eliminating welded or bolted joints.

✦ Precision-ground raceways – Raceways are ground to tight tolerances (within 0.01 mm) for smooth roller motion and consistent preload.

✦ Induction-hardened contact surfaces – Raceways hardened to 58–62 HRC with a case depth of 2.5–3.5 mm for extended wear resistance.

✦ Integrated seal channels – Seal grooves are machined directly into both rings to accommodate standard NBR or FKM lip seals.


Features

✦ High rigidity in compact space – The single-row crossed roller design delivers exceptional stiffness within a narrow axial footprint, ideal for space-constrained applications.

✦ Accurate positioning – The alternating roller orientation eliminates clearance, providing precise rotational control for indexing and positioning tasks.

✦ Smooth motion under combined loads – Simultaneous contact with both raceways ensures stable rotation even when axial, radial, and moment loads act together.

✦ Easy gear integration – The external gear allows direct pinion engagement, simplifying the drive system design.

✦ Low maintenance requirement – Precision-ground raceways reduce wear, extending the time between scheduled maintenance.

✦ Simplifies sealing – Integrated seal channels allow quick installation of standard seals, reducing assembly time.


Further Reading