What's the Charactor of Thin Section Bearing JA040XP0

1. Basic Structural Identity

JA040XP0 belongs to JA series X-type four-point contact constant cross-section thin section bearing (Reali-Slim type) with inch dimensions:

• Bore: 4.0 inch (101.6 mm)
• Outer diameter: 4.5 inch (114.3 mm)
• Uniform cross-section width: 0.25 inch (6.35 mm)
• Single-row gothic arch raceway design, 4 contact points between steel balls and raceways
• Double-sided nitrile rubber contact seals (suffix P0 = sealed version)
• Standard cage: brass snap-over separator; rolling elements & rings: AISI 52100 chrome bearing steel
• Precision grade: ABEC-1; pre-greased at factory, RoHS compliant

2. Core Design Features

(1) Ultra-thin constant cross-section

The cross-sectional size stays fixed (0.25"×0.25") regardless of bore size. Compared with standard deep groove ball bearings of the same inner diameter:

Only ~5% of standard bearing weight (JA040XP0 net weight = 0.19 lbs)

Cross-sectional area is merely 20% of conventional bearings, drastically saving radial & axial installation space

(2) Multi-directional load bearing capacity (key advantage of X-type 4-point contact)

A single JA040XP0 replaces two back-to-back mounted angular contact bearings, simultaneously supporting three load types without extra axial space:

Radial load: Dynamic radial load 756 lbf, static radial load 1290 lbf

Bidirectional axial/thrust load: Dynamic thrust 1210 lbf, static thrust 3220 lbf

Overturning moment load: Dynamic moment 1205 in-lbf, static moment 2740 in-lbf

Perfect for equipment with tilting, swing or reversing axial force requirements

(3) Integrated double sealing system

Light lip contact inner seal minimizes rotational friction torque

Seals lock internal lubricant inside and block dust, moisture, particles from entering

Extends service life and reduces frequent re-lubrication maintenance

Operating temperature range: -30℃ ~ 110℃, adaptable to most indoor & mild industrial environments

3. Performance Advantages

High stiffness & low deflection: More small-diameter steel balls arranged circumferentially provide uniform rigidity under combined loads

Low friction & smooth rotation: Optimized gothic arch raceway reduces rolling friction, stable low-speed running

Lightweight compact structure: Ideal for miniaturized, lightweight mechanical equipment

Single-bearing simplification: Eliminates complex paired bearing installation & preload adjustment work

Stable running accuracy: Controlled dimensional tolerance for consistent rotational precision

4. Limitations

Not optimal for pure heavy radial load scenarios (A-type thin section bearings perform better for single radial force)

Not designed for ultra-high rotating speeds (limited RPM compared with high-speed precision bearings)

5. Typical Application Scenarios

Robotic joints, medical imaging equipment, optical inspection instruments, aerospace rotary components, precision turntables, semiconductor automation equipment, surveillance pan-tilt units, compact precision machinery.