Core Application & Target User Demand
This document covers spare parts for the Grease Lubricating System of BOMCO Drawworks models, including JC-90, JC-70, JC-50, JC-40, JC-90DB, JC-70DB, JC-50DB, JC-40DB, JC-90D, JC-70D, and JC-5. Tailored for oil & gas drilling operation teams, professional lubrication system maintenance providers, and mining machinery spare part purchasers, these parts are crucial for stable grease delivery, ensuring effective lubrication of drawworks moving components (e.g., bearings, gears). They address the core demands for pressure-resistant, corrosion-resistant, and leak-proof spare parts, as well as professional technical support to prevent lubrication failure, component wear, and equipment breakdown.
Grease Lubricating System Connection Components
Connection components (joints, nozzles, pipe sleeves, copper pipes) are the core of the grease delivery system. In high-pressure grease transmission and harsh drilling environments with vibration and dust, these components are prone to thread wear, seal failure, or pipe blockage, leading to grease leakage and insufficient lubrication. They adopt precision machining and pressure-resistant design to ensure reliable grease delivery.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | AF7003031801 Joint R3/8-M16X1.5 | Brass (H62), nickel-plated for corrosion resistance; sealing ring: nitrile rubber (NBR 70) compliant with GB/T 3452.1-82 | 1. Thread wear due to repeated assembly/disassembly during maintenance; 2. Sealing failure caused by grease contamination and sealing ring aging | 1. Apply thread sealant (complying with GB/T 14074-2017) during installation; 2. Clean the joint surface before assembly and replace the sealing ring every 1200 working hours |
2 | AF7003031802 Right-angle joint R3/8-M16X1.5 | Brass (H62), nickel-plated; sealing ring: NBR 70 | 1. Fatigue cracking at the right-angle position due to long-term vibration; 2. Corrosion of internal flow channel caused by moisture in grease | 1. Check for cracks with magnetic particle inspection every 1500 working hours; 2. Use water-free grease (moisture content ≤ 0.1%) and install a moisture separator in the system |
3 | AF7003031803 Through-wall joint | Brass (H62), nickel-plated; flange: aluminum alloy (6061); sealing ring: fluorine rubber (FKM) | 1. Flange deformation caused by uneven tightening force; 2. Sealing leakage due to FKM ring aging under high temperature | 1. Tighten the fixing bolts in a cross pattern with uniform torque (35-45N·m); 2. Replace the FKM sealing ring every 1800 working hours and avoid use in environments above 120℃ |
4 | 061302011152101000 Nozzle tip M10X1 | Stainless steel (304), precision drilled; internal check valve: GCr15 bearing steel | 1. Nozzle clogging caused by grease impurities; 2. Check valve wear due to long-term high-pressure grease impact | 1. Install a pre-filter (filtration precision 10μm) before the nozzle per GB/T 25984-2010; 2. Clean the nozzle monthly and replace the check valve if grease backflow occurs |
5 | 520901150083020000 Pipe sleeve Φ10 | Copper (T2), soft and deformable for tight fitting; surface anti-corrosion treatment | 1. Deformation failure due to excessive compression during installation; 2. Corrosion caused by humid drilling environment | 1. Control compression amount within 30-40% of original thickness using special tools; 2. Apply anti-corrosion grease to the outer surface before installation |
6 | 051102010100010002 Red copper pipe Φ10X1 | Oxygen-free copper (TP2), high pressure resistance (≥ 10MPa); surface oxidation resistance treatment | 1. Bending cracking due to improper bending during installation; 2. Fatigue wear at the bending position caused by long-term vibration | 1. Use a pipe bender for bending, ensuring minimum bending radius ≥ 8×pipe diameter; 2. Reduce the number of bending points and fix the pipe at 50cm intervals to reduce vibration |
Grease Lubricating System Fasteners & Fixing Components
Fasteners and fixing components (nuts, screws, pipe clips) ensure the stability of the lubricating system. In high-vibration drilling environments, these components are prone to loosening, thread wear, or corrosion, leading to component displacement and grease leakage. They comply with national fastener standards, ensuring high strength and anti-loosening performance.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | AF7003031804 Nut | Brass (H62), nickel-plated; thread precision grade 6H compliant with GB/T 197-2003 | 1. Thread wear caused by over-tightening during installation; 2. Corrosion of thread due to grease and moisture erosion | 1. Tighten with a torque wrench to specified torque (25-35N·m); 2. Clean threads after use and apply anti-corrosion grease |
2 | 520901150069020000 Nut M16X1.5 | Brass (H62), nickel-plated; thread precision grade 6H | 1. Loosening caused by resonant vibration during drilling; 2. Deformation of nut hexagonal head due to improper tool use | 1. Use spring washers and thread locking adhesive for anti-loosening; 2. Use a socket wrench matching the nut size to avoid slipping and deformation |
3 | 420101010704001006 Screw M4X10 | Carbon steel (4.8 grade), galvanized for corrosion resistance; cross recess: Phillips type | 1. Cross recess wear caused by improper screwdriver use; 2. Corrosion of screw shaft due to humid environment | 1. Use a screwdriver with matching size and type to avoid slipping; 2. Apply anti-corrosion paint to the screw head after installation in humid areas |
4 | T005-010.00 Pipe clip assembly Φ10 | Steel strip (Q235A) + rubber pad (EPDM); steel strip surface galvanized | 1. Rubber pad aging and hardening due to long-term sunlight and high temperature; 2. Steel strip deformation caused by excessive clamping force | 1. Replace the EPDM rubber pad every 1000 working hours; 2. Adjust clamping force to avoid copper pipe deformation (clamping pressure ≤ 0.5MPa) |
Grease Lubricating System Identification & Auxiliary Components
Identification and auxiliary components (nameplates, planks) ensure equipment traceability and structural protection. In harsh drilling environments with vibration, dust, and impact, nameplates are prone to fading or falling off, while planks may deform or corrode, affecting equipment management and component protection. These components are designed for durability and reliable performance.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | AF7003031805 Nameplate | Stainless steel (304); marking: laser engraving compliant with GB/T 13306-2011 | 1. Oxidation of surface caused by long-term exposure to humid air; 2. Scratching of engraved information by foreign objects | 1. Wipe the surface with anti-rust oil every 3 months; 2. Install a transparent protective cover to avoid direct contact with foreign objects |
2 | AF7003031806 Plank | Aluminum alloy (6063), anodized; thickness: 5mm | 1. Deformation caused by impact from falling debris during drilling; 2. Corrosion of anodized layer due to chemical substances in drilling fluids | 1. Install a protective baffle above the plank; 2. Clean the plank immediately if contaminated by drilling fluids and reapply anti-corrosion coating if needed |
On-Site Fault Maintenance Case
Case 1: Grease Leakage Caused by Through-Wall Joint Sealing Failure
Fault Phenomenon: During daily inspection of BOMCO JC-90 drawworks, the maintenance team found obvious grease leakage at the through-wall joint (AF7003031803) of the grease lubricating system. The leakage amount increased gradually, resulting in insufficient grease supply to the drawworks' main bearing, and the bearing temperature rose by 15℃ compared to the normal level.
Fault Diagnosis: Disassembly inspection showed that the FKM sealing ring of the through-wall joint was aged, hard, and cracked, and the flange surface had slight corrosion. The root cause was that the sealing ring exceeded its service life (not replaced for 2500 working hours) and the flange surface was not cleaned in time after being contaminated by drilling fluid, leading to sealing failure.
Maintenance Process: 1. Replace the aged FKM sealing ring with a new one that complies with GB/T 3452.1-82; 2. Polish the corroded flange surface with abrasive paper to restore flatness (surface roughness Ra ≤ 0.8μm); 3. Clean the joint and flange thoroughly, apply a thin layer of grease-compatible sealant, and reinstall the through-wall joint; 4. Tighten the fixing bolts in a cross pattern with a torque wrench to the specified torque (35-45N·m); 5. Conduct a pressure test (test pressure 1.2×rated working pressure) and a leak test, confirming no grease leakage. After the test run, the bearing temperature returned to normal.
Preventive Measures: 1. Establish a regular replacement system for sealing rings of key joints, replacing FKM sealing rings every 1800 working hours; 2. Clean the surface of joints and flanges monthly to avoid corrosion caused by drilling fluid contamination; 3. Install a protective cover for the through-wall joint to reduce exposure to harsh environments.
Case 2: Nozzle Clogging Leading to Insufficient Lubrication
Fault Phenomenon: During operation of BOMCO JC-70 drawworks, the drawworks' gearbox made abnormal noise, and the vibration amplitude increased significantly. Inspection found that the grease nozzle tip (061302011152101000) of the gearbox lubrication point was clogged, resulting in no grease entering the gear meshing surface, and the gear surface showed obvious dry wear.
Fault Diagnosis: Disassemble the nozzle tip and found that the internal check valve was stuck by grease impurities, and the nozzle hole was clogged. The root cause was that the pre-filter in front of the nozzle was not cleaned for a long time, leading to impurities entering the nozzle with the grease, and the check valve was worn due to long-term use.
Maintenance Process: 1. Replace the clogged nozzle tip with a new one; 2. Disassemble the pre-filter, clean the filter element (replace if damaged), and reinstall it; 3. Clean the grease pipeline connected to the nozzle to remove residual impurities; 4. Inject new grease into the gearbox lubrication point manually to ensure sufficient lubrication; 5. Test run the drawworks, confirming that the abnormal noise and vibration disappeared, and the gear lubrication status was normal.
Preventive Measures: 1. Clean the pre-filter element every 300 working hours and replace it every 1000 working hours; 2. Inspect and clean all nozzle tips monthly, and replace the nozzle tip if the check valve is worn; 3. Use high-quality grease with good fluidity and low impurity content (impurity content ≤ 0.02%).
Procurement Guide & Technical Support
All parts listed in this document are fully compatible with BOMCO Drawworks JC series models (JC-90, JC-70, JC-50, JC-40, JC-90DB, JC-70DB, JC-50DB, JC-40DB, JC-90D, JC-70D, JC-5) and comply with national and industry standards such as GB/T 197-2003, GB/T 3452.1-82, and Q/BOMCO 006-2024. Choosing these standard-compliant, high-quality spare parts can effectively ensure the stable operation of the grease lubricating system, improve the lubrication effect of drawworks components, extend the service life of the equipment, and reduce maintenance costs.
We provide professional technical support for all purchased parts, including on-site installation guidance, grease lubricating system fault diagnosis, and customized maintenance solutions. If you have procurement needs for the parts mentioned in this document or need to match related parts using the provided part number list, please contact our sales team. Our team will provide you with reliable product supply and efficient technical services to meet your drilling equipment operation and maintenance needs.
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