SIGMA Bearing

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SIGMA Bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Most bearings facilitate the desired motion by minimizing friction. Bearings are classified broadly according to the type of operation, the motions allowed, or to the directions of the loads (forces) applied to the parts.


Rotary bearings hold rotating components such as shafts or axles within mechanical systems, and transfer axial and radial loads from the source of the load to the structure supporting it. The simplest form of bearing, the plain bearing, consists of a shaft rotating in a hole. Lubrication is used to reduce friction. In the ball bearing and roller bearing, to reduce sliding friction, rolling elements such as rollers or balls with a circular cross-section are located between the races or journals of the bearing assembly. A wide variety of bearing designs exists to allow the demands of the application to be correctly met for maximum efficiency, reliability, durability and performance.

SIGMA ESU 2010 44 thrust ball bearings

0.6250 in 1.2188 in
Black Oxide Nylon

38,1 mm x 82,55 mm x 19,05 mm SIGMA LJT 1.1/2 angular contact ball bearings

Chrome Steel 0.3750 in
2.5625 in Non-Flanged Cup

75 mm x 160 mm x 55 mm SIGMA N 2315 cylindrical roller bearings

33 mm Round
Single Row Non-Fill ABEC 3 (ISO Cla

75 mm x 160 mm x 55 mm SIGMA NJ 2315 cylindrical roller bearings

10.0000 in 2.8125 in
416000 lbf 206000 lbf, 358000 l

SIGMA RT-769 thrust roller bearings

Set Screw 200 °F
2108 lb VF3S 100

140 mm x 300 mm x 62 mm SIGMA QJ 328 N2 angular contact ball bearings

78 mm Two-Bolt Flange
Standard Duty Round

80 mm x 125 mm x 27 mm SIGMA GE 80 SX plain bearings

2.6875 in 2000 lbs
Chrome Steel 0.8750 in

SIGMA MR-44 needle roller bearings

Rubber Liner 1/2 in

SIGMA ELU 20 0644 thrust ball bearings

SIGMA ELU 20 0644
1 pcs Negotiable

170 mm x 215 mm x 22 mm SIGMA 61834M deep groove ball bearings

24 in Steel
Stepped 170 mm x 215 mm x 22 mm

133,35 mm x 184,15 mm x 25,4 mm SIGMA RXLS 5.1/4 cylindrical roller bearings

Plastic 3000 RPM
2.0938 in Without Snap Ring