CAT 394-6509 BEARING-ROLL

CAT 394-6509 is a Caterpillar original single-row cylindrical roller bearing, suitable for road roller vibratory wheel shaft systems. The following is purely accurate information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 394-6509 (3946509) Single-row Cylindrical Roller Bearing

Part Type: Single-row cylindrical roller bearing (NU type, inner ring without flange, outer ring with double flange), bearing pure radial loads, suitable for medium-to-high speed rotational conditions

Material: SAE 52100 high-carbon chromium bearing steel, quenching hardness HRC60-64, raceway surface roughness Ra≤0.08μm, roller cylindricity tolerance≤0.002mm

Key Dimensions: Inner diameter 45.00mm, outer diameter 75.00mm, total width 20.00mm, roller diameter 6.00mm, number of rollers 12, chamfer 1.0×45°

Structural Features The inner ring has no flange, while the outer ring has double flanges. The rollers make line contact with both the inner and outer rings. It is compatible with 45.00mm diameter journals, with a radial clearance of C3 (0.015-0.028mm).

Compatible Structure: Journal fit tolerance k5, journal interference 0.008-0.015mm, operating temperature -40℃ to +120℃, rated dynamic load 42kN, rated static load 40kN.

Lubrication Requirements: Grease lubrication, CAT 4V-9668 lithium-based grease is recommended. The filling amount is 1/3-1/2 of the bearing cavity, replenished every 1000 working hours.

Compatible Models and Assemblies:
Road Roller: CAT CB-14B (Vibratory Wheel Shaft System)

Compatible Assembly: CB-14B Vibratory Wheel Support Bearing Assembly

Matching Parts: 394-6509 Bearing, 8T-4125 Shaft retaining ring, 161-8220 sealing ring, 5P-1949 bearing end cap
Installation and Fitting Points
**Before installation, clean the journal, bearing housing bore, and bearing to ensure there are no metal shavings or oil stains.** Use cold pressing for installation; pressure ≤20kN. Do not strike the bearing end face to avoid deformation.

Journal fit tolerance k5, bearing housing bore fit tolerance H7. After installation, the bearing end face should fit snugly against the housing bore without gaps, the shaft should rotate without jamming, and the radial clearance should meet C3 grade requirements.

After installation, inject the specified type of grease. Check for leaks before installing into the machine.

Use a special puller for disassembly to avoid damaging the journal or housing bore. When replacing, check that the journal wear is ≤0.05mm. If it exceeds this tolerance, replace the journal or shaft assembly simultaneously.