Product Video
Products Description
|
Brand |
Product Name |
Model |
Weight/pc |
Part Number |
|
Caterpillar |
slewing bearing |
374D |
1132 KG |
3678361 |
Product Details
|
Product Name |
slewing bearing |
|
Part Number |
3678361 |
|
Origin |
United States |
|
Brand Name |
STONE |
|
Model |
374D |
|
Price |
Negotiable |
|
Packing Details |
Standard Export Packing |
|
Delivery Time |
0-30 Days |
|
Payment Term |
L/C, T/T |
|
Price Term |
FOB, CIF, CFR |
|
Supply Capacity |
50,000 PCS/Month |
|
Minimum Order Quantity |
1 PC |
|
Material |
High Quality Steel |
|
Technology |
Precision Machining |
|
Surface |
Treatment Anti-Corrosion Coating |
|
Hardness |
HRC 48-52 |
|
Quality |
Original Factory Standard |
|
After-Sales Service |
Full Support, Online Service |
|
Color |
Standard Caterpillar Yellow or Customizable |
|
Application |
Excavator |
|
Customizable |
including customized materials, surface treatment and specifications |
Product advantages
Made of high-strength chromium-molybdenum alloy steel with superior load capacity
Adopts 42CrMo special alloy structural steel for the ring body. Alloyed with chromium and molybdenum, it features a tensile strength over 1080MPa. Integral forging ensures compact internal structure without porosity defects, capable of bearing heavy axial force, radial force and overturning moment during operation, perfectly matching the heavy-duty working condition of CAT 374D 70-ton excavator.
Precision heat treatment achieves optimal hardness and toughness
Adopts combined process of quenching & tempering plus surface induction hardening.The core reaches HB 240-280 after tempering to maintain excellent toughness, absorbing strong impact during hard rock excavation and preventing body fracture.Raceway and gear surface are induction hardened to HRC 55-62 with deep hardened layer, outstanding wear resistance, effectively avoiding pitting and peeling for longer service life.
GCr15 bearing steel roller with excellent wear resistance and service life
Cross rollers adopt high-carbon chromium bearing steel GCr15, integrally hardened to HRC 60-64. With uniform carbide distribution and high contact fatigue strength, matched with large-size roller design, it provides large bearing area and high stability, running stably for a long time under heavy-load and dusty working conditions such as mines and quarries.
High material purity with outstanding fatigue resistance
Our slewing bearing for sale adopts vacuum degassing and refining for raw materials, with extremely low harmful impurities such as sulfur and phosphorus. The interior is free of pores, inclusions and microcracks. Under millions of alternating loads, it delivers excellent resistance to fatigue crack growth, effectively preventing early failure and ensuring ultra-long durability and high machine availability.
Production process
Integrated precision forging forming
Our slewing bearing for sale adopts integral forging technology to process the ring blank in one-piece forming. The internal metal structure is uniform and compact, eliminating inherent defects such as air holes and slag inclusions. Its overall strength and impact resistance are far superior to ordinary welding and splicing processes.
CNC finishing and precise gear machining
The whole production adopts large CNC lathes, gear hobbing machines and gear slotting machines. Strict control is implemented on raceway dimension, gear profile accuracy and concentricity with extremely tight machining tolerances, ensuring smooth slewing meshing and uniform clearance.
Multiple professional heat treatment processes
It undergoes quenching and tempering, plus high-frequency quenching on raceways and gear surfaces. The product achieves tough core and hard wear-resistant surface with uniform hardened depth, greatly improving resistance to fatigue, peeling and deformation for long-term heavy-duty operation.
Gradual inspection and full factory testing
Process quality inspection is carried out throughout production, including material spectral analysis, hardness testing, dimensional accuracy verification, sealing fit test and no-load slewing running test. Every finished unit passes strict inspection before delivery.
Working Performance
Stable and smooth slewing operation
It features smooth start and stop with no stalling or jittering. The slewing rotation is uniform and steady during operation, delivering precise control feel. It greatly improves the fluency of compound operations such as loading, leveling and rock excavation.
Strong overload and anti-overturning capacity
Our slewing bearing for sale is ideal for large-tonnage heavy-duty working conditions. It can reliably withstand axial force, radial force and overturning moment when digging hard soil and rocks or working with lateral eccentric load, with great resistance to deformation and deviation to ensure stable operation of the machine.
Wear-resistant with low failure rate
High meshing precision of raceway and gear surface provides excellent resistance to pitting, peeling and abrasion. Under long-term high-intensity continuous operation in mines and construction sites, the slewing clearance remains stable with little change, and abnormal noise or looseness rarely occurs.
Excellent tightness and adaptability to harsh conditions
Adopted reliable sealing structure, it effectively blocks dust, sediment and rainwater from entering the interior, preventing lubricant leakage and impurity abrasion. It can operate stably for a long time in dusty, humid and wild harsh environments with longer maintenance cycles.
STONE
Stone is a leading supplier of engineering machinery parts, focusing on providing high-quality parts for mining companies. Since its establishment in 2004, we have been based in Shanghai, China, and have built our own brand STONE, becoming a trusted choice in the industry. We are committed to providing a variety of parts including bulldozers, excavators and wheel loaders for well-known brands such as Caterpillar and Komatsu. Our product line covers a full range of OEM parts, such as Track Chain, Track Rollers, Sprocket, Excavator Buckets, Blades, Excavator Cylinders, Swing Circles, and various electrical and hydraulic components to ensure that our customers' stringent requirements for quality and performance are met.
quality
years experience
service
hours warrant
Q＆A
What causes abnormal noise of the slewing bearing?
It is mainly caused by raceway wear, ball damage, excessive gear meshing clearance, insufficient grease or sediment and impurities entering the interior. Replenish special grease in time and clean foreign matters. Replace the slewing bearing if wear is serious to avoid further damage.
Why is the slewing bearing stuck and unsmooth in rotation?
It is usually caused by uneven mounting surface, uneven bolt tightening, local raceway pitting or aging dust ingress. Check the base flatness, retighten bolts diagonally, perform maintenance and refill grease, and replace aging seals in time.
What leads to oil leakage and oil splashing of slewing bearing?
Main reasons are aging and deformed seals, worn sealing surface, excessive grease filling or high working temperature causing internal overpressure. Replace original seals and control grease filling quantity to solve oil leakage effectively.
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