493-3807: Bearing-Cone

Cat 493-3807 is a Caterpillar single-row tapered roller bearing (including inner ring/outer ring/roller assembly) used in heavy-duty transmission components such as drive axles, gearboxes, and differentials in construction machinery. It can withstand both radial and bidirectional axial loads and is suitable for high-impact and vibration conditions. The following are the core parameters and application points:

Core Parameters (Precise and Authoritative Version)

Item Details
Basic Information: Model 493-3807, type is single-row tapered roller bearing, inner and outer rings are separable, suitable for journal and bearing housing mounting, used to transmit torque, withstand complex loads, prevent axial movement of components, and improve transmission system stability. Suitable for drive axles, gearboxes, differentials, and steering systems of Cat 777/785 mining trucks, D11 bulldozers, 992K loaders, C18 engines, etc.

Compatible Models: Compatible with Cat 777F/785C mining trucks, D10T/D11… This product is commonly used in bulldozers, 992K/993K loaders, C18/C32 engines, 836H/856H wheel loaders, and 793F mining dump trucks, particularly in drive axle main reducers, differential housings, gearbox output shafts, steering knuckle kingpins, and drive shaft supports.

Material and Manufacturing Process: The material is GCr15SiMn bearing steel, treated with vacuum degassing, carburizing, quenching, and tempering. Hardness HRC 60-64. Surface is steam-treated for corrosion protection. Contact fatigue strength ≥1200MPa, elastic modulus 208GPa. The rollers feature a convex design to optimize contact stress, reduce edge loads, and adapt to heavy-duty impact conditions.

Key Dimensions: Inner diameter 85.90mm (3.382in), outer diameter 146.05mm (5.75in), width 35.72mm (1.406in), number of rollers 16, contact angle 15°, clearance rating… C3, chamfer radius R3.5mm, weight approximately 1.8kg, rated speed (grease lubrication) 3200rpm, (oil lubrication) 4500rpm
Load and Accuracy: Basic rated dynamic load Cr 185kN, basic rated static load Cor 240kN, ultimate axial load 120kN, radial runout ≤0.02mm, axial clearance 0.05-0.12mm, rotational accuracy P6 grade, conforms to ISO 355 standard, can withstand heavy loads and frequent start-stop impacts, no risk of fatigue spalling
Compatible Components: Compatible with Cat 10-9275 extreme pressure lithium-based grease (filling amount 1/3-1/2 of bearing cavity), 493-3808 bearing outer ring, 8T-8730 bearing installation tool, 493-3809 bearing seal ring, matching journal machining accuracy h6, bearing housing bore accuracy H7, ensuring installation accuracy and leak-proof sealing.
Function, Installation, and Maintenance Points
Core Function: Utilizing the tapered contact surface of tapered rollers, it simultaneously bears radial loads and bidirectional axial loads, limiting axial displacement of components. It is suitable for heavy-load, high-speed, and frequent impact conditions, protecting critical transmission components such as the drive axle and gearbox, and extending their service life.

Installation Points: Clean the journal and bearing housing bore, checking for burrs and scratches; heat the bearing inner ring to 80-100℃ before installation, avoiding impact; adjust the axial clearance to 0.05-0.12mm; tighten the bearing cap bolts to the specified torque (according to the model manual), ensuring smooth and unobstructed bearing operation.

Maintenance Points: Check bearing temperature and abnormal noise every 1000 hours; replenish grease every 2000 hours; disassemble and inspect bearing wear every 5000 hours; avoid contact with water, dust, and other impurities to prevent lubrication failure and corrosion; replace the bearing immediately if roller peeling, cage damage, or excessive clearance is found.