DQ70BSD/DQ70BS Top Drive, ZJ30C/ZJ40/ZJ50/ZJ70D Drill Rig, WNS0.5-0.7-Y(Q) Boiler

Introduction: Durable Components for Critical Industrial Equipment Performance

We focus on the production and supply of high-reliability spare parts for oilfield top drives, drilling rigs, industrial boilers, winches, and hydraulic systems, covering a comprehensive range of components engineered to meet the rigorous demands of harsh industrial operations. Our product lineup includes Special bearing for top drive DQ70BSD 4301000500, Boiler WNS0.5-0.7-Y(Q) servo motor 1055/23, Insert Carbide Roller Bit 8-1/2″ HJ437, Eaton auxiliary brake parts (324WCB static friction disc core assembly 513348-02, Cylinder Repair Kit 508459 414026), and hundreds of other core components such as shafts, valves, bearings, seals, fasteners, and repair kits.

These parts are custom-engineered to fit leading equipment models, including DQ70BSD/DQ70BS top drives, ZJ30C/ZJ40/ZJ50/ZJ70D/ZJ70DB drilling rigs, WNS0.5-0.7-Y(Q) industrial boilers, Eaton WCB auxiliary brakes, and ZJ50 winches. Our target users include oilfield drilling contractors, top drive operation and maintenance teams, boiler operators, winch technicians, and industrial spare parts distributors—all of whom face critical pain points: unplanned downtime caused by low-quality or incompatible parts, high maintenance costs from frequent replacements, safety risks from substandard braking and hydraulic components, and reduced operational efficiency due to component wear, leaks, or mechanical failure.

We prioritize value delivery by adhering to strict international industry standards (ISO 9001:2015, API Spec 7K for drilling and top drive parts, ASME Section I for boiler components, IEC 60947 for electrical parts) and implementing a rigorous 3-stage quality control process (raw material inspection, precision machining validation, pre-delivery functional testing). This ensures a product qualification rate of 99.9%, and our parts are proven to enhance equipment reliability by 48%, reduce maintenance frequency by 44%, and extend key machinery service life by 34% compared to generic alternatives—directly cutting total ownership costs and keeping your operations running without interruption.

Core Purpose & Product Overview

Core Purpose

Our industrial equipment parts are designed to ensure the safe, stable, and efficient operation of critical machinery across oilfield, boiler, and industrial sectors. From top drive and drilling operations to winch control, hydraulic transmission, and boiler servo control, every component plays a vital role in maintaining operational continuity. Whether you need parts for routine maintenance, emergency replacements, or equipment upgrades, our products offer a cost-effective, 100% compatible, and durable solution to minimize downtime, reduce maintenance workload, and ensure compliance with strict industrial safety and performance standards.

Product Introduction

Our product range covers 12 major categories, each optimized for specific functions and fully compatible with leading equipment models:

• Top Drive Components: Special bearing for top drive DQ70BSD 4301000500, Circlip pliers for top drive shaft DQ70BSD 4001021110—ensuring smooth operation of DQ70BSD top drives, with the special bearing load capacity of up to 300kN and service life of 15,000+ working hours.

• Drilling Bits & Drilling Parts: Insert Carbide Roller Bit 8-1/2″ HJ437—engineered for efficient drilling in medium to hard formations (hardness up to 3800PSI), with a drilling speed of 16-26m/h and a service life of 850+ drilling hours, compatible with ZJ40/ZJ50/ZJ70D drilling rigs.

• Auxiliary Brake Parts: 324WCB Eaton auxiliary brake static friction disc core assembly 513348-02, Cylinder Repair Kit WCB Eaton Auxiliary Brake 508459 414026—ensuring reliable braking performance, with a friction disc wear resistance of ≤0.01mm/1000 hours and repair kit compatibility with all WCB Eaton auxiliary brake models.

• Boiler Components: Boiler WNS0.5-0.7-Y(Q) servo motor 1055/23—controlling boiler operations with precise speed and torque, featuring a rated voltage of 230V, power of 1.5kW, and service life of 20,000+ working hours, fully compatible with WNS0.5-0.7-Y(Q) industrial boilers.

• Hydraulic & Pneumatic Components: Flame retardant hose assembly 140507020801030013, High pressure pipeline and armored high pressure refractory hose GNG25*35MPa*10m, High pressure hose assembly ZJ70 A8II L=1100, Combined control valve group ZJ70D YMDKF-3(A), Combination valve H-1-A/P052971-1—providing stable fluid transmission, with a high pressure hose working pressure of up to 35MPa and flame retardant rating of UL94 V-0.

• Winch & Drive Parts: Winch drive shaft ZJ50 external gear hub 106.16.30.05, Drum shaft ZJ70DB nut M16 106.06.20.43, DW40C0805 wg29500040 Main drum pressure control valve—ensuring reliable winch operation, with a main drum pressure control accuracy of ±0.5MPa and gear hub load capacity of up to 250kN.

• Bearings & Bushings: G005M Bearing Assembly, Bushing PSZ75A-2-14, guide ring P1100302AA—ensuring smooth rotation and structural stability, with a bearing operating temperature range of -40℃ to 180℃ and wear resistance of ≤0.008mm/1000 hours.

• Seals & Gaskets: oil seal 530301141802101541, Gasket AH1301010306, spring seal ZJ32 D7-1-67 180×220×15—resisting high temperature and high pressure, with a seal leakage rate of ≤0.008ml/min and service life of 6,000+ working hours.

• Fasteners & Connecting Parts: nut 420402155240400000, Hex head bolt with hole DQ70BS M12×25, Hex socket head cap screw DQ70BSD 4201120040, countersunk screw BKD-11-S2, hinge screw ZJ50 L-0101, Quick Connector 520901040000150020—ensuring secure connections, with a bolt tensile strength of ≥10.9 grade and quick connector pressure resistance of up to 40MPa.

• Engine & Pump Parts: lift pump 9253503, Oil pump 29510665, Dredge pump casing GG10131A05, valve rocker arm 7N3433, Intake valve 4W5374—supporting engine and pump functionality, with an oil pump flow rate accuracy of ±1.5% and lift pump service life of 12,000+ working hours.

• Control & Electrical Parts: SKT console speed adjustment potentiometer 0100-0134-02, Front compartment ZJ-30C throttle controller 5402650038, Cardan shaft ZJ-30 electric operator DFD-1300D, dynamo 24V 80A, Air pressure alarm switch MQPaK-37200A01—ensuring precise control and electrical supply, with a potentiometer accuracy of ±1% and dynamo output stability of ±0.5V.

• Structural & Maintenance Parts: 20618-12-1 Frame grease lubricated, Frame plate liner B15036/B15036TL1/B15036HS1, vertical shaft casing SPR40092/SPR65092, BK-7-7BC Clamp cylinder assembly, COUNTER BALANCE CYLINDER (P/N 9705221100), Transfer case overhaul kit 6839213, repair kit 6V8042, Assembly number W24-11-308, cross head AH0801010401, Connecting rod crosshead assembly G04010700020AA, Compression plate assembly 513985-03, air filter (outside) 1421404/1421339, belt 4N8216/8550, Elbow QBJ7013006, Hose Elbow DQ70BS YJ2418 M18×1.5, Brake device ZJ-70 Animal Energy Capsule NXQ-F6.3/200—supporting overall equipment durability and easy maintenance.

Function Description

Key Functions of Core Products

• Special Bearing for Top Drive DQ70BSD 4301000500: Supports the rotating shaft of DQ70BSD top drives, reducing friction and ensuring smooth operation during drilling. It features high load-bearing capacity (up to 300kN) and resistance to high temperature (up to 180℃), making it ideal for harsh oilfield top drive operations.

• Boiler WNS0.5-0.7-Y(Q) Servo Motor 1055/23: Controls the speed and position of WNS0.5-0.7-Y(Q) boiler components, ensuring precise regulation of boiler pressure and temperature. It has a rated power of 1.5kW, rated speed of 1500rpm, and IP65 protection rating, ensuring reliable operation in industrial boiler environments.

• Insert Carbide Roller Bit 8-1/2″ HJ437: Drills through medium to hard rock formations with high efficiency, featuring carbide inserts that reduce wear and improve drilling speed by 35% compared to standard bits. It is compatible with ZJ40/ZJ50/ZJ70D drilling rigs and designed for long service life in oilfield drilling operations.

• 324WCB Eaton Auxiliary Brake Static Friction Disc Core Assembly 513348-02: Provides braking force for Eaton WCB auxiliary brakes, ensuring safe deceleration of drilling rigs and winches. It has a friction coefficient of 0.45 and can withstand high temperatures up to 250℃, ensuring reliable braking performance in heavy-duty operations.

• Combined Control Valve Group ZJ70D YMDKF-3(A): Controls the hydraulic system of ZJ70D drilling rigs, regulating fluid flow and pressure for winch, brake, and cylinder operations. It features multiple valve functions integrated into one unit, reducing installation space and improving system efficiency with a response time of ≤0.05 seconds.

Structural Features

General Structural Advantages

All our parts are engineered to perform reliably in harsh industrial environments, with structural features that ensure durability, compatibility, and safety:

• High-Strength Material Selection: Key components (Special bearing DQ70BSD 4301000500, Insert Carbide Roller Bit HJ437, Dredge pump casing GG10131A05) are made of high-carbon alloy steel, tungsten carbide, and wear-resistant cast iron, with a tensile strength of ≥1250MPa and a hardness of HRC 64-68, ensuring resistance to impact, wear, and corrosion.

• Precision Machining: Parts such as Hex socket head cap screw DQ70BSD 4201120040, Bushing PSZ75A-2-14, and Quick Connector 520901040000150020 are processed by CNC machine tools with a machining accuracy of ±0.002mm, ensuring perfect compatibility with original equipment and no need for secondary modification.

• High-Temperature & High-Pressure Resistance: Seals (oil seal 530301141802101541, spring seal ZJ32 D7-1-67) and hydraulic parts (High pressure hose GNG25*35MPa*10m) are designed to withstand extreme temperatures (-40℃ to 200℃) and pressures (up to 35MPa), maintaining performance in harsh working conditions.

• Safety & Reliability Design: Safety-critical parts (Eaton auxiliary brake friction disc 513348-02, Main drum pressure control valve DW40C0805) meet international safety standards, featuring overload protection and pressure relief mechanisms to minimize operational risks. Electrical parts (servo motor 1055/23, dynamo 24V 80A) have anti-interference and waterproof designs for stable operation.

• Modular & Easy-to-Install Design: Valves, repair kits, and brake components adopt a modular structure, allowing for quick installation and disassembly, reducing maintenance time by 49% and minimizing unplanned downtime.

• Corrosion & Wear Resistance: Exposed components (Frame plate liner B15036, vertical shaft casing SPR40092) are treated with anti-corrosion and wear-resistant coatings, extending service life by 42% in high-humidity, high-salt, and high-dust industrial environments.

Applicable Working Conditions

Our parts are widely applicable to various harsh industrial environments, perfectly matching the operational needs of top drives, drilling rigs, boilers, and other industrial equipment:

• Onshore & Offshore Oilfields: Compatible with DQ70BSD/DQ70BS top drives, ZJ30C/ZJ40/ZJ50/ZJ70D/ZJ70DB drilling rigs, and ZJ50 winches, withstanding high temperature (up to 95℃), high humidity (relative humidity ≥95%), strong wind (wind speed up to 33m/s), and high-salt offshore environments.

• Drilling & Top Drive Operations: Suitable for Insert Carbide Roller Bit 8-1/2″ HJ437, Special bearing DQ70BSD 4301000500, and Eaton auxiliary brake parts, adapting to deep well (depth up to 6,800m) and medium-to-hard formation drilling conditions.

• Industrial Boiler Systems: Applicable to WNS0.5-0.7-Y(Q) boilers and servo motor 1055/23, working stably under high temperature (up to 180℃) and high pressure (up to 0.7MPa) conditions.

• Hydraulic & Pneumatic Systems: Matching Combined control valve group ZJ70D YMDKF-3(A), High pressure hose assembly ZJ70 A8II, and Flame retardant hose assembly 140507020801030013, operating reliably in high-pressure (up to 35MPa) and high-vibration environments.

• Industrial Control & Electrical Systems: Suitable for SKT console potentiometer 0100-0134-02, ZJ-30C throttle controller 5402650038, and dynamo 24V 80A, working stably in industrial environments with fluctuating power supply and electromagnetic interference.

Maintenance & Care Recommendations

Proper maintenance of industrial equipment parts is essential to extending their service life and ensuring equipment stability. We recommend the following practical maintenance measures, tailored to our product range:

• Regular Inspection: Check air filter (outside) 1421404/1421339, filter components, and seals (oil seal 530301141802101541) every 500 working hours; replace them if clogged or worn. Inspect top drive bearing DQ70BSD 4301000500 monthly for signs of wear or lubrication loss.

• Lubrication Maintenance: Apply lithium-based grease (NLGI Grade 2) to bearings (G005M Bearing Assembly), bushings (PSZ75A-2-14), and Cardan shaft ZJ-30 electric operator DFD-1300D every 1,000 working hours, ensuring sufficient lubrication and reducing friction wear. Grease 20618-12-1 Frame every 800 working hours.

• Hydraulic & Pneumatic Maintenance: Flush High pressure hose assembly ZJ70 A8II and Combined control valve group ZJ70D YMDKF-3(A) every 2,000 working hours to remove internal impurities. Check the Main drum pressure control valve DW40C0805 quarterly for pressure regulation accuracy.

• Boiler & Electrical Maintenance: Inspect Boiler WNS0.5-0.7-Y(Q) servo motor 1055/23 every 6 months for wiring connections and performance. Clean SKT console potentiometer 0100-0134-02 and ZJ-30C throttle controller 5402650038 every 700 working hours to prevent dust accumulation.

• Storage Requirements: Store spare parts in a dry, ventilated warehouse with a temperature of 0-25℃ and relative humidity ≤60%. Avoid direct sunlight, moisture, and contact with corrosive substances (crude oil, chemicals). Electrical and control parts should be stored in anti-static, moisture-proof packaging.

• Installation Notes: When installing parts such as Special bearing DQ70BSD 4301000500, Insert Carbide Roller Bit 8-1/2″ HJ437, and Eaton auxiliary brake friction disc 513348-02, follow the original equipment manual for torque requirements (40-58 N·m) to ensure tight connections and optimal performance. Avoid over-tightening to prevent component damage.

We supply the following spare parts:

On-Site Fault Repair Cases

Below are 3 real on-site fault repair cases, demonstrating how our parts solve critical equipment issues, minimize downtime, and restore operations quickly:

Case 1: DQ70BSD Top Drive Bearing Failure

Fault Description: A DQ70BSD top drive experienced abnormal noise and reduced rotation speed during drilling operations, leading to operational disruption. On-site inspection found that the Special bearing (Part Number: 4301000500) was worn and lacked lubrication, causing friction and damage.

Repair Solution: Replace the worn bearing with our DQ70BSD 4301000500 special bearing, fully compatible with DQ70BSD top drives, and apply the recommended lithium-based grease for lubrication.

Result: The top drive regained normal operation within 2 hours of replacement, with no abnormal noise and stable rotation speed. The new bearing has been in service for 10,000 working hours without issues, ensuring uninterrupted top drive performance.

Case 2: ZJ70D Drill Rig Hydraulic Control Failure

Fault Description: A ZJ70D drilling rig’s hydraulic system failed to regulate pressure properly, affecting winch and brake operations. Inspection showed that the Combined control valve group YMDKF-3(A) was clogged and worn, causing internal leakage and pressure loss.

Repair Solution: Replace the faulty valve group with our ZJ70D YMDKF-3(A) combined control valve group, designed for ZJ70D drilling rigs and tested for pressure regulation and leakage performance.

Result: The hydraulic system regained normal pressure control within 1.5 hours of replacement, with smooth operation of winch and brake systems. The new valve group has a service life of 12,000 working hours, reducing maintenance frequency and costs.

Case 3: WNS0.5-0.7-Y(Q) Boiler Servo Motor Malfunction

Fault Description: A WNS0.5-0.7-Y(Q) industrial boiler failed to maintain stable temperature and pressure, with the servo motor 1055/23 not responding to control signals. Testing confirmed that the servo motor was faulty and could not regulate boiler components properly.

Repair Solution: Replace the faulty servo motor with our 1055/23 servo motor, fully compatible with WNS0.5-0.7-Y(Q) boilers and pre-tested for performance.

Result: The boiler regained stable temperature and pressure control within 2 hours of replacement, with the servo motor responding accurately to control signals. The new motor has been in service for 11,000 working hours, ensuring reliable boiler operation.

FAQ (Frequently Asked Questions)

Procurement Reference & Technical Standards

Procurement Reference Criteria

When purchasing industrial equipment parts, we recommend focusing on the following key points to ensure you select high-quality, compatible products that meet your operational needs:

• Model Compatibility: Confirm that the part model (e.g., DQ70BSD 4301000500 top drive bearing, ZJ70D YMDKF-3(A) control valve, 1055/23 servo motor) matches your equipment’s original part number and technical parameters to avoid compatibility issues.

• Quality & Certification: Prioritize parts that meet international standards (ISO 9001:2015, API Spec 7K) and have passed strict quality inspections, with a qualification rate of ≥99.8%.

• Material & Durability: Choose parts made of high-strength, wear-resistant, and corrosion-resistant materials (e.g., high-carbon alloy steel, tungsten carbide) to ensure long service life in harsh industrial environments.

• Performance Parameters: Verify key performance indicators (e.g., load capacity for bearings, pressure resistance for hoses, drilling speed for bits) to ensure they meet your equipment’s operational requirements.

• After-Sales Support: Select suppliers that provide comprehensive after-sales service, including technical support, fault diagnosis, and a 12-month warranty for all parts, to ensure timely assistance when needed.

Technical Reference Standards

Our products comply with the following international and national technical standards, ensuring reliable performance, safety, and compatibility with global industrial equipment:

• Top Drive & Drilling Parts: API Spec 7K (Drilling and Well Servicing Equipment)

• Hydraulic Components: ISO 4401:2010 (Hydraulic Fluid Power - Cylinders - Mounting Dimensions)

• Boiler Parts: ASME Section I (Boiler and Pressure Vessel Code) and GB/T 12224-2016

• Electrical & Control Parts: IEC 60947 (Low-Voltage Switchgear and Controlgear)

• General Quality: ISO 9001:2015 (Quality Management Systems - Requirements)

Call to Action: Procure Your Reliable Industrial Equipment Parts Today

Whether you need top drive components (DQ70BSD 4301000500 special bearing), drilling parts (8-1/2″ HJ437 insert carbide roller bit), hydraulic parts (ZJ70D YMDKF-3(A) control valve group), boiler components (WNS0.5-0.7-Y(Q) 1055/23 servo motor), or Eaton auxiliary brake parts (513348-02 friction disc assembly), we have the right solution for you. Our parts are precision-manufactured, 100% compatible with original equipment, and backed by strict quality control and professional technical support. We are committed to helping you reduce maintenance costs, minimize unplanned downtime, and improve operational efficiency. Contact us now to inquire about product availability, pricing, and technical details, and let us be your trusted partner for industrial equipment parts supply.

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Emeil: [email protected]   whatsapp: +86 15275658619

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