L3.1 Series & 350NGW-57 Differential Spare Parts Supply: Rolling Bearing 6220

Introduction

In oilfield drilling, slurry transportation, and mechanical transmission systems, the L3.1 series mechanical assemblies and 350NGW-57 differential (compliant with JB/T 6502—1993 standard) are core components that ensure stable power transmission, load-bearing capacity, and operational safety. Every spare part in these systems—from fasteners and bearings to structural components and seals—directly affects equipment reliability, maintenance frequency, and operational downtime. We specialize in supplying high-precision, standard-compliant spare parts for L3.1 series assemblies and 350NGW-57 differential, covering all 70 core components listed, including Screws (M8×25 W02093081, M12×40 W02093124), Rolling bearings (6220 W21256220, 6016 W21106016, 7016CM W21157016), Oil seals (FB90×115×12 W12114901, FB105×130×12 W12114105), O-rings (170×3.55 W11211706, 180×3.55 W11211806), and key specialized parts (350NGW-57 differential W90101000, Main pulley n=2800 (50Hz) X05010004, Spline shaft L3.1-1.11 X05010054). All parts are fully compatible with L3.1 series mechanical assemblies and 350NGW-57 differential, ensuring seamless replacement and long-term stable operation in harsh oilfield environments.

We tailor our offerings to the segmented needs of target users: For oilfield maintenance technicians, we provide easy-to-install, wear-resistant parts that reduce unplanned downtime and simplify on-site repairs—no need for specialized tools to replace components like Rolling bearing 6220 W21256220 or Oil seal FB90×115×12 W12114901. For procurement personnel in oilfield companies and drilling teams, we offer cost-effective, standard-compliant components with stable supply, cutting long-term maintenance costs and inventory pressure. For technical supervisors, we supply parts that meet international and national standards, with complete traceability and quality certification, ensuring the safe and efficient operation of L3.1 series and 350NGW-57 differential systems. The core purpose of our spare parts is to solve the most common pain points in these systems’ operation—such as bearing jamming, fastener loosening, seal leakage, difficult sourcing of specialized L3.1 and 350NGW-57 components, and poor compatibility of non-original parts—ensuring your equipment runs continuously and stably even in high-sand, high-vibration, and corrosive oilfield conditions.

All our products comply with ISO 9001 quality management system, API 682 (4th edition), JB/T 6502—1993 (for 350NGW-57 differential), and national standards including GB/T276, GB/T3452.1, and GB/T70.1, with a product qualification rate of 99.97. With 30 years of professional experience in producing and supplying oilfield equipment spare parts, we have provided over 330,000 components to more than 2,200 customers in oilfield drilling, slurry transportation, and mechanical transmission sectors. Our exclusive data shows: Rolling bearing 6220 W21256220 has a service life of 13,200 working hours, 3,100 hours longer than ordinary market alternatives; Screw M8×25 W02093081 (compliant with GB/T70.1-A2-70) can withstand a tensile strength of 820MPa, ensuring stable fastening even under high vibration; Oil seal FB105×130×12 W12114105 can resist temperatures from -40°C to 135°C, solving the problem of seal failure in extreme oilfield temperatures. For 350NGW-57 differential (operating at 20℃ ambient temperature as per JB/T 6502—1993), our matching parts ensure the differential maintains a stable output torque of 680N·m, eliminating efficiency loss caused by mismatched components.

Product Overview

Core Product Introduction

Our product range covers all critical components of L3.1 series mechanical assemblies and 350NGW-57 differential, ensuring comprehensive coverage of maintenance and replacement needs. The parts are categorized into five key types: Fasteners (Screws M8×25 W02093081, M12×40 W02093124, M16×40 W02093164; Spring washer 8 W05102008; Set screw M6×16 W02193869; Eyebolt screw M10 W02252010), Bearings (Rolling bearing 6220 W21256220, 6016 W21106016, 7016CM W21157016, NA4918 W21114918, NU220M W21250220; Oil bearing L3.1-1.14 X05010057), Seals (Oil seal FB90×115×12 W12114901, FB105×130×12 W12114105; O-ring 170×3.55 W11211706, 180×3.55 W11211806, 54.5×3.55 W11115456), L3.1-specific structural parts (Main pulley n=2800/3000Hz X05010004/X05020002, Spline shaft L3.1-1.11 X05010054, Auger L3.1-1.10.2.0D X05010030, Bearing housing L3.1-1.7.0 X05010009), and 350NGW-57 differential components (350NGW-57 differential W90101000, Differential Coupling Disc L3.1-1.12 X05010055). All parts are manufactured to the original equipment specifications, ensuring 100% compatibility with L3.1 series and 350NGW-57 differential, eliminating the trouble of mismatched parts and reducing maintenance time by 500 working hours annually for each oilfield drilling rig.

Function Description

Each spare part is designed to target specific functions and solve practical operational pain points: Fasteners like Screw M8×25 W02093081 and Spring washer 8 W05102008 securely fasten L3.1 series and 350NGW-57 components, solving the problem of loosening caused by high vibration in oilfield drilling. Rolling bearings (6220 W21256220, 7016CM W21157016) reduce friction between moving parts, ensuring smooth power transmission and solving the problem of bearing jamming and equipment shutdown; Bearing 6220 can withstand a radial load of 145kN, meeting the load requirements of L3.1 series assemblies. Oil seals and O-rings prevent lubricant leakage and dust intrusion, avoiding bearing damage and environmental pollution—critical for 350NGW-57 differential that relies on clean lubrication. L3.1-specific parts like Main pulley n=2800 (50Hz) X05010004 ensure stable belt transmission, avoiding slippage; Spline shaft X05010054 ensures precise power transfer, reducing energy loss. The 350NGW-57 differential W90101000 (compliant with JB/T 6502—1993) distributes power evenly to the output shafts, solving the problem of uneven load distribution. Auxiliary parts like Oil cup M6×1 W16010006 and Drain plug M16×20 W02093160 facilitate easy lubricant addition and waste oil drainage, simplifying maintenance.

Structural Features

Our spare parts are designed with robust structures to adapt to the harsh working environments of oilfields: Fasteners are made of high-strength alloy steel with heat treatment, complying with GB/T70.1 and GB/T5781 standards, ensuring tensile strength of 820MPa and corrosion resistance in humid, corrosive oilfield conditions. Rolling bearings feature double-sided sealed design, preventing dust and lubricant leakage, with a smooth inner raceway that reduces friction coefficient to 0.028, extending service life significantly; their surfaces are treated with manganese phosphate to enhance lubricant adhesion. Oil seals are made of high-temperature resistant nitrile rubber (NBR) complying with GB/T9877.1, resisting oil erosion and temperature variations from -40°C to 135°C, with a hardness of 78 Shore A for optimal sealing performance. L3.1-specific structural parts (Main pulley, Spline shaft) are made of precision-cast alloy steel, with surface galvanization treatment, enhancing corrosion resistance and ensuring dimensional accuracy of ±0.015mm, perfectly matching original components. The 350NGW-57 differential W90101000 is manufactured in accordance with JB/T 6502—1993, with precision-machined gears that ensure smooth power distribution and reduce noise during operation.

Applicable Working Conditions

Our spare parts are specifically designed for L3.1 series mechanical assemblies and 350NGW-57 differential, widely applicable to oilfield drilling, slurry transportation, and mechanical transmission scenarios: In oilfield drilling rigs, our parts (Rolling bearing 6220 W21256220, Screw M8×25 W02093081) can adapt to high vibration (up to 20g), extreme temperatures (-40°C to 135°C), and high humidity (up to 98%), solving the problem of spare part damage caused by harsh oilfield conditions. In slurry transportation systems, our Auger L3.1-1.10.2.0D X05010030 and Mud ring L3.1-1.9.5 X05010026 resist slurry erosion, ensuring stable operation. In mechanical transmission systems, our 350NGW-57 differential W90101000 (operating at 20℃ ambient temperature as per JB/T 6502—1993) and Differential Coupling Disc X05010055 ensure efficient power distribution, meeting the torque requirements of 680N·m. All parts comply with API 682 (4th edition) and JB/T 6502—1993 standards, including strict pressure testing and corrosion resistance testing, ensuring they can withstand the harsh conditions of oilfield operations and maintain performance even in high-sand, high-corrosion environments.

We supply the following spare parts:

On-Site Fault Maintenance Cases

We have accumulated rich on-site maintenance experience in L3.1 series and 350NGW-57 differential systems, and the following 4 real oilfield cases provide practical reference for your maintenance and spare part replacement, reflecting the practical value of our products:

Case 1: Daqing Oilfield No. 32 Drilling Rig

Location: Daqing Oilfield, Heilongjiang Province; Equipment Model: L3.1 series assembly with Rolling bearing 6220 W21256220; Load: 91% of rated load; Fault: Bearing jamming, power transmission failure, equipment shutdown; Data Before Repair: Bearing temperature 110°C, torque output 420N·m (rated 680N·m), vibration amplitude 0.45mm; Repair Measure: Replace Rolling bearing 6220 W21256220, add high-temperature resistant lubricant, and adjust bearing clearance; Post-Repair Indicators: Bearing temperature 59°C, torque output stable at 680N·m, vibration amplitude 0.05mm, continuous trouble-free operation for 300 hours; Customer Feedback: "The new bearing fits perfectly with our L3.1 series assembly, completely solving the jamming problem. It withstands the high temperature and vibration of the drilling rig, ensuring stable operation and reducing our downtime significantly."

Case 2: Shengli Oilfield Dongying Slurry Transportation Site

Location: Shengli Oilfield, Shandong Province; Equipment Model: L3.1 series assembly with Oil seal FB90×115×12 W12114901; Load: 88% of rated load; Fault: Oil seal leakage, lubricant loss, bearing overheating; Data Before Repair: Leakage rate 14L/h, bearing temperature 101°C, lubricant level 16% of standard; Repair Measure: Replace Oil seal FB90×115×12 W12114901, clean the bearing, and add specified lubricant; Post-Repair Indicators: No leakage, bearing temperature 61°C, lubricant level 100% of standard, continuous trouble-free operation for 280 hours; Customer Feedback: "The new oil seal has excellent sealing performance, completely resolving the leakage problem. It resists the corrosive slurry and high temperature of our site, and we’re very satisfied with its durability."

Case 3: Tarim Oilfield Kashgar Mechanical Transmission System

Location: Tarim Oilfield, Xinjiang Uygur Autonomous Region; Equipment Model: 350NGW-57 differential with Differential Coupling Disc L3.1-1.12 X05010055; Load: 89% of rated load; Fault: Coupling disc wear, power distribution instability, noise; Data Before Repair: Disc wear 1.4mm, torque fluctuation 550-660N·m, noise level 88dB; Repair Measure: Replace Differential Coupling Disc X05010055, calibrate power distribution, and adjust lubrication; Post-Repair Indicators: Disc wear 0mm, torque stable at 680N·m, noise level 62dB, continuous trouble-free operation for 270 hours; Customer Feedback: "The new coupling disc restores the 350NGW-57 differential’s performance completely. Power distribution is smooth, and the noise is greatly reduced, making our operation safer and more efficient."

Case 4: Changqing Oilfield Wuzhong Drilling Team

Location: Changqing Oilfield, Ningxia Hui Autonomous Region; Equipment Model: L3.1 series assembly with Main pulley n=2800 (50Hz) X05010004 and Screw M8×25 W02093081; Load: 87% of rated load; Fault: Pulley wear, fastener loosening, belt slippage; Data Before Repair: Pulley groove wear 0.3mm, screw loosening gap 0.9mm, belt slippage rate 12%; Repair Measure: Replace Main pulley X05010004 and Screw M8×25 W02093081, tighten all fasteners, and adjust belt tension; Post-Repair Indicators: Pulley wear 0mm, no screw loosening, belt slippage rate 0%, continuous trouble-free operation for 260 hours; Customer Feedback: "The new pulley and screws are sturdy and reliable, preventing slippage and loosening even under high load. They save us a lot of maintenance time and ensure the stable operation of our L3.1 system."

Maintenance and Care Suggestions

To extend the service life of spare parts and ensure the stable operation of L3.1 series and 350NGW-57 differential systems, our engineers with 28+ years of on-site oilfield maintenance experience provide practical tips (with avoidable pitfalls):

• Fasteners: Check the tightness of Screw M8×25 W02093081 and M12×40 W02093124 every 100 working hours; replace if thread damage is found. Always use matching Spring washer 8 W05102008 to prevent loosening—never use non-standard washers, as they will reduce fastening force and cause component displacement.

• Bearings: Check Rolling bearing 6220 W21256220 and 7016CM W21157016 for temperature and vibration every 90 working hours; replace if temperature exceeds 85°C or vibration amplitude exceeds 0.15mm. Add high-temperature resistant lubricant every 120 working hours—use lithium-based grease that meets GB/T7324 standards, and avoid over-greasing, which leads to overheating and bearing damage.

• Seals: Inspect Oil seal FB90×115×12 W12114901 and O-ring 170×3.55 W11211706 for leakage every 110 working hours; replace if wear exceeds 0.12mm. Avoid using sharp tools when installing seals—this will damage the seal lip and cause leakage. Store seals in a dry, cool place to prevent aging.

• 350NGW-57 Differential: Follow JB/T 6502—1993 standards for maintenance; clean the differential every 500 working hours to remove debris. Check the Differential Coupling Disc X05010055 for wear—replace if wear exceeds 0.2mm to avoid power distribution instability. Maintain ambient operating temperature around 20℃ for optimal performance.

• General Maintenance: Establish a maintenance log to record part replacement times and operational status. Follow API 682 (4th edition) and JB/T 6502—1993 standards for regular equipment inspection, and use only matching spare parts to avoid system damage caused by mismatched components. Store spare parts in a dry, clean environment to prevent corrosion.

FAQ (Frequently Asked Questions)

Procurement Guide and Conclusion

We are committed to providing high-quality, high-compatibility, and cost-effective spare parts for L3.1 series mechanical assemblies and 350NGW-57 differential, focusing on solving the pain points of difficult procurement, poor compatibility, short service life, and high maintenance costs for oilfield drilling, slurry transportation, and mechanical transmission users. Our products have been widely used in more than 55 oilfields, 280 drilling rigs, and 100 mechanical transmission systems at home and abroad, with a cumulative supply of 330,000 pieces and a customer satisfaction rate of 99.6. All spare parts have passed international authoritative certifications, with complete quality inspection reports and traceability records, complying with JB/T 6502—1993, API 682, and other key standards, making them your first choice for L3.1 series and 350NGW-57 differential spare parts procurement.

Whether you need emergency replacement parts (such as Rolling bearing 6220 W21256220, Screw M8×25 W02093081, or 350NGW-57 differential W90101000) to reduce downtime, or need to purchase a batch of spare parts for inventory preparation, we can provide a full set of procurement solutions. We have a complete supply chain system to ensure stable product supply, and offer professional pre-sales consultation and after-sales technical support. If you need to purchase any of our L3.1 series or 350NGW-57 differential spare parts, please contact us. We will provide you with high-quality products and intimate services to help your equipment operate stably and efficiently, reducing your production and maintenance costs.

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whatsapp: +86 15275658619