Description
511-6891: Bearing-Cone (DLC Extended Life)
| 511-6891: Bearing-Cone (DLC Extended Life) |
| 130-3639: 169.48mm ID Retainer Freewheel Cam Sleeve |
| 597-8049: Retainer As |
| 296-6268: Bearing – Needle(Debris Resistant) |
| 8X-5489: Engine Wiring Sleeve |
| 177-4149: Bearing – Cup(Debris Resistant) |
| 7C-1511: 34.14mm Outer Diameter Plunger Ring |
| 7W-2731: Indicator Retainer |
Cat 511-6891 is a Caterpillar single-row cylindrical roller bearing inner ring with a DLC (diamond-like carbon) long-life coating, suitable for heavy-duty mechanical transmission components. Its main features are wear resistance, low friction, and long life. Key information is as follows:
Key Parameters
Item Details
Type: Cylindrical roller bearing inner ring, DLC-coated for enhanced performance, suitable for medium-high speed and medium-high load conditions, specifically designed to withstand radial loads, suitable for high-precision shaft transmission requirements.
Dimensions (Metric/Imperial): Inner diameter 140mm (5.512 inches), Outer diameter 170mm (6.693 inches), Width 28mm (1.102 inches), Weight approx. 1.8kg (3.97 lbs)
Material and Coating: Base material: SAE 52100 high-carbon chromium bearing steel, integrally hardened to HRC60-64; DLC coating: thickness 3-5μm, hardness… HV2000-3000, friction coefficient ≤0.1, wear-resistant and corrosion-resistant, suitable for harsh working conditions.
Precision: Inner diameter roundness ≤0.0015mm, radial runout ≤0.003mm, surface roughness Ra≤0.2μm, suitable for high-precision transmission systems.
Operating Conditions: Operating temperature -40℃ to 150℃, maximum speed 3800rpm, suitable for formulated gear oils/extreme pressure lithium-based greases, suitable for impact load conditions.
Suitable Scenarios: Suitable for the gearbox output shaft, drive axle differential, hydraulic motor drive shaft, etc. of Cat 336D/336E excavators, 980H/982M loaders, and 777G mining trucks, used to withstand high radial loads, suitable for medium-high speed and high-frequency impact conditions, ensuring transmission system stability.
Suitable for replacing bearings during equipment overhauls to address vibration, abnormal noise, and oil temperature rise caused by inner raceway wear, pitting, and coating peeling, extending the overall service life of the bearing.
Performance Characteristics
DLC coating significantly reduces the coefficient of friction, decreases wear and heat generation, improves bearing fatigue resistance, and extends bearing life by 2-3 times compared to ordinary inner rings, making it suitable for heavy-duty, high-frequency impact conditions.
High-carbon chromium bearing steel base material combined with integral quenching ensures the strength and toughness of the inner ring, enabling it to withstand high radial loads and operate stably under complex conditions.
High-precision machining and coating processes guarantee compatibility with the outer ring and rollers, reducing vibration and noise, and improving transmission efficiency.
