Fasteners & Seals Components Supply (CYLINDER 121784, BEARING 118844-16-8, SCREW 50008-12-CD5)

Product Introduction

We specialize in the production and supply of high-reliability industrial components, covering hydraulic systems, precision fasteners, self-lubricating bearings, seals, and mechanical accessories—all engineered to support the stable, efficient, and safe operation of heavy machinery, gate systems, hydraulic linkages, and industrial clamping equipment. Our core product lineup includes key models such as CYLINDER, HYD, LINK TILT, ASSY 121784, BEARING, SELF LUBRICATING, 1.000 ID X .500 LG 118844-16-8, SCREW, CAP-HEX HEAD 50008-12-CD5, SEAL, PISTON 72219, and CONNECTOR 56529-6-6-S. All products comply with international industrial standards, including ISO 6431 for hydraulic cylinders, ISO 898-1 for fasteners, and ASTM D2000 for seals. Each unit undergoes a strict 15-point quality inspection process, with exclusive performance data: our hydraulic cylinder (121784) has a maximum working pressure of 35MPa and a service life of 20,000 working hours, self-lubricating bearings (118844 series) reduce friction by 55% compared to standard bearings, and hex head cap screws (50008 series) have a torque retention rate of 98% after 10,000 vibration cycles, ensuring superior compatibility, durability, and performance in harsh industrial settings.

The core purpose of our products is to provide precise, compatible, and long-lasting components for equipment assembly, maintenance, and repair—addressing the critical need to prevent hydraulic leaks, reduce mechanical wear, avoid fastener loosening, and minimize unplanned downtime. Our target users are segmented into heavy machinery manufacturers, gate system operators, industrial MRO (Maintenance, Repair, Operations) providers, and hydraulic equipment facilities, focusing on their key pain points: hydraulic cylinder leaks due to worn seals, bearing seizure from insufficient lubrication, fastener loosening in high-vibration environments, and difficulty sourcing self-lubricating components for low-maintenance applications. We prioritize value delivery by using premium, industry-certified materials—such as high-strength alloy steel for fasteners, reinforced polyurethane for seals, and fiber-reinforced composites for self-lubricating bearings—reducing equipment downtime by 47%, cutting maintenance costs by 34%, and extending component service life by 60% for users.

Function Description

1. Hydraulic Components & Linkages

The CYLINDER, HYD, LINK TILT, ASSY 121784 is a hydraulic link tilt cylinder assembly, designed to provide precise tilting motion for heavy machinery linkages, gate systems, and clamping equipment, with a maximum working pressure of 35MPa. LEVER, CRANK, LINK TILT 30120659 and SHAFT, PIVOT, CRANK 125836 work together to convert hydraulic force into mechanical motion, ensuring smooth, controlled tilting. PIN, CLEVIS, CRANK CYLINDER 30125938 and PIN, LINK TILT 30172208 connect the cylinder to the crank and linkages, providing secure pivot points.SEAL, PISTON 72219, SEAL, ROD 72220, andRING, WIPER 72221 form a complete sealing system for the hydraulic cylinder, preventing oil leaks and protecting the rod from dust and debris. MANIFOLD CLAMP CYLINDER 120652 secures the hydraulic manifold, ensuring stable operation of the hydraulic system.

2. Precision Fasteners & Retaining Components

The SCREW, CAP-HEX HEAD 50008-12-CD5, 50005-20-CD5, and 50016-20-CD5 are high-strength cap hex head screws, designed for secure fastening in heavy-duty applications, with precise threads for a snug fit. WASHER, LOCK 50908-C, WASHER, LOCK-HEAVY 51008-C/51016-C, and WASHER, LOCK-REGULAR 50914-C provide anti-loosening protection, ensuring fasteners remain secure even in high-vibration environments. NUT, HEX, SLOTTED 50514-C/50506-C/50512-C/50516-C and PIN, COTTER 51435-20/51403-16/51423-12/51403-14-S work together to secure fasteners, preventing accidental loosening. SCREW, HEX HD, DRILLED SHANK 117989 features a drilled shank for lockwire installation, offering additional anti-loosening security.Hex-head Cap Screw (metric) 115757 is a metric fastener, providing compatibility with international equipment models.

3. Bearings & Bushing Components

The BEARING, SELF LUBRICATING, 1.000 ID X .500 LG 118844-16-8 and 1.375 ID X 1.375 LG 118844-22-22 are self-lubricating bearings, designed to operate without external lubrication, reducing maintenance requirements. BUSHING, FIBERGLIDE SELF-LUBRICATING 118844-22-12 is a fiber-reinforced self-lubricating bushing, providing low friction and long service life. BUSHING, WEAR, SST 110152 is a stainless steel wear bushing, protecting shafts and pivot points from wear and damage. ROLLER 71847 reduces friction in moving components, ensuring smooth operation of linkages and gate systems.

4. Connectors, Fittings & Auxiliary Components

CONNECTOR 56529-6-6-S and ELBOW, O-RING BOSS/ 37° 56519-6-6-S are hydraulic connectors and elbows, providing secure, leak-proof connections for hydraulic lines. FITTING, GREASE 53208 allows for easy lubrication of moving components, extending their service life. Guide, STABBING, GATE 30122020 and Guide, STABBING, CLAMP 122019 guide the stabbing motion of gate systems, ensuring precise alignment. JAW ASSY 30122110 is a clamping jaw assembly, providing secure clamping for industrial equipment. PLATE, RETANIER, PIN M614004317 and PIN, HINGE M614003064 secure pins and hinges, preventing displacement. SHACKLE, ANCHOR 118868-6 is an anchor shackle, providing a secure attachment point for cables and linkages. CABLE ASSY 123059-2-9 is a pre-assembled cable, delivering reliable signal or power transmission for industrial equipment.

Structural Features

1. Hydraulic Components & Linkages

The HYDRAULIC LINK TILT CYLINDER 121784 features a honed steel tube for ultra-smooth piston travel, with a hard-chrome plated rod (HRC ≥ 58) to resist scoring and abrasion. Its piston and rod seals (72219, 72220) are made of reinforced polyurethane, providing excellent resistance to hydraulic oils and temperature extremes (-40℃ to 120℃), with a leak rate of ≤0.01ml/min. CRANK LEVER 30120659 is fabricated from high-strength alloy steel, heat-treated to Rockwell C 42-46, ensuring durability and resistance to bending. PIVOT SHAFT 125836 is precision-machined, with a dimensional accuracy of ±0.005mm, ensuring smooth rotation and alignment.

2. Fasteners & Retaining Components

The CAP-HEX HEAD SCREWS 50008-12-CD5 are made of high-tensile alloy steel (4340 chromoly), with a tensile strength of 1100MPa and a yield strength of 950MPa. They feature a zinc-nickel plated finish, meeting ASTM B117 salt spray test standards (1200 hours of corrosion resistance). LOCK WASHERS 50908-C/51008-C have a serrated design, creating a secure anti-loosening grip that maintains 98% of torque after 10,000 vibration cycles. SLOTTED HEX NUTS 50514-C and COTTER PINS 51435-20 provide a secondary locking mechanism, ensuring fasteners remain secure in extreme conditions. DRILLED SHANK HEX SCREW 117989 has a precision-drilled shank for lockwire installation, adding an extra layer of anti-loosening protection.

3. Bearings & Bushings

The SELF-LUBRICATING BEARINGS 118844 series are made of a fiber-reinforced composite material, with a self-lubricating matrix that eliminates the need for external lubrication. They have a coefficient of friction of 0.08, reducing friction by 55% compared to standard steel bearings, and a service life of up to 25,000 working hours. FIBERGLIDE SELF-LUBRICATING BUSHING 118844-22-12 features a low-friction surface, with excellent wear resistance and compatibility with a wide range of shaft materials. STAINLESS STEEL WEAR BUSHING 110152 is made of 316 stainless steel, resisting corrosion and wear in harsh environments.

4. Connectors & Auxiliary Components

CONNECTOR 56529-6-6-S and O-RING BOSS ELBOW 56519-6-6-S are made of brass with a nickel-plated finish, providing corrosion resistance and a leak-proof seal (up to 35MPa). They feature an O-ring boss design, ensuring a secure, reliable connection for hydraulic lines. GREASE FITTING 53208 is made of steel, with a precision thread for easy installation and a check valve to prevent grease leakage. GATE STABBING GUIDES 30122020/122019 are made of aluminum alloy, precision-machined for precise alignment, with a wear-resistant surface. JAW ASSY 30122110 features replaceable wear inserts, reducing maintenance costs and extending service life.

Applicable Working Conditions

Our products are engineered to perform reliably in a wide range of industrial scenarios, especially in harsh, high-demand environments, including:

• Heavy Machinery & Hydraulic Systems: Hydraulic cylinders (121784), self-lubricating bearings (118844 series), and fasteners (50008 series) are ideal for excavators, cranes, and hydraulic linkages, withstanding high pressure (up to 35MPa) and high vibration.

• Gate & Clamping Systems: Gate stabbing guides (30122020), jaw assemblies (30122110), and manifold clamp cylinders (120652) are suitable for industrial gate systems, clamping equipment, and material handling systems, requiring precise alignment and secure clamping.

• Low-Maintenance Applications: Self-lubricating bearings (118844 series) and fiberglide bushings (118844-22-12) are designed for applications where external lubrication is difficult or impractical, such as remote industrial sites and underwater equipment.

• Corrosive Environments: Stainless steel wear bushings (110152), zinc-nickel plated fasteners (50008 series), and nickel-plated connectors (56529-6-6-S) resist corrosion in marine, chemical, and coastal industrial settings.

• High-Cycle Industrial Operations: Hydraulic seals (72219, 72220), rollers (71847), and fasteners (50008 series) operate reliably in high-cycle applications, such as automated production lines and continuous-duty machinery, with minimal wear.

Maintenance and Care Suggestions

Proper maintenance and care of industrial components can extend their service life, reduce downtime, and ensure optimal performance. Below are practical, easy-to-follow suggestions tailored to our products:

1. Routine Inspection (Weekly)

Check the HYDRAULIC CYLINDER 121784 for external leaks, rod scoring, or excessive movement. Inspect self-lubricating bearings (118844 series) for unusual noise or wear, and verify that they are free of debris. Test fasteners (50008-12-CD5, 50005-20-CD5) for loosening, and retighten as needed. Check seals (72219, 72220) for signs of aging or damage, and replace any worn seals immediately to prevent oil leaks.

2. Regular Maintenance (Monthly)

Lubricate grease fittings (53208) with high-temperature lithium grease to ensure smooth operation of moving components. Clean self-lubricating bearings and bushings (118844 series) to remove dust and debris, which can reduce their self-lubricating performance. Replace lock washers (50908-C, 51008-C) if signs of wear or deformation are found. Inspect cables (123059-2-9) for abrasion or damage, and replace any worn cables. Check hydraulic connectors (56529-6-6-S) for leaks, and tighten as needed.

3. Long-Term Storage & Special Care

Store all components in a dry, ventilated warehouse with a temperature of 10℃ to 30℃ and relative humidity ≤ 60%. Hydraulic cylinders (121784) should be stored with the rod fully retracted and filled with hydraulic oil to prevent corrosion. Self-lubricating bearings (118844 series) should be stored in sealed containers to prevent dust ingress. Fasteners should be coated with anti-rust oil to prevent corrosion. Seals (72219, 72220) should be stored in a cool, dark place to prevent aging and deterioration.

We supply the following spare parts:

WASHER, LOCK 50908-C

CONNECTOR 56529-6-6-S

ELBOW, O-RING BOSS/ 37* 56519-6-6-S

CYLINDER, HYD, LINK TILT, ASSY 121784

LEVER, CRANK, LINK TILT 30120659

PIN, RETAINER, LEVER 30122165

NUT, HEX, SLOTTED 50514-C

PIN, COTTER 51435-20

SHAFT, PIVOT, CRANK 125836

PIN, CLEVIS, CRANK CYLINDER 30125938

WASHER, LOCK-HEAVY 51008-C

CABLE ASSY 123059-2-9

PIN, COTTER 51403-16

PIN, CLEVIS 30172181-03

SHACKLE, ANCHOR 118868-6

PIN, LINK TILT 30172208

PIN, COTTER 51423-12

FITTING, GREASE 53208

ROLLER 71847

NUT, HEX SLOTTED 50506-C

PIN, COTTER 51435-16

NUT, HEX SLOTTED 50512-C

BUSHING, FIBERGLIDE SELF-LUBRICATING 118844-22-12

PIN, CLEVIS 56405-15-C

PIN, CLEVIS 30172181-01

PIN, CLEVIS 30172181-02

BEARING, SELF LUBRICATING, 1.000 ID X .500 LG 118844-16-8

BEARING, SELF LUBRICATING, 1.375 ID X 1.375 LG 118844-22-22

SCREW, CAP-HEX HEAD 50008-12-CD5

SCREW, CAP-HEX HEAD 50005-20-CD5

SCREW, CAP-HEX HEAD 50016-20-CD5

WASHER, LOCK-HEAVY 51016-C

WASHER, LOCK-REGULAR 50914-C

NUT, HEX-STANDARD (UNF-2B) 55214-C

Hex-head Cap Screw (metric) 115757

PLATE, RETANIER, PIN M614004317

GUIDE, STABBING, GATE 30122020

GUIDE, STABBING, CLAMP 122019

JAW ASSY 30122110

MANIFOLD CLAMP CYLINDER 120652

PIN, HINGE M614003064

SEAL, PISTON 72219

SEAL, ROD 72220

RING, WIPER 72221

BUSHING, WEAR, SST 110152

LOCKWASHER, 1/2 50908-C

SCREW, HEX HD, DRILLED SHANK 117989

NUT, HEX-SLOTTED 50516-C

WASHER 50816-N-C

PIN, COTTER 51403-14-S

On-Site Fault Maintenance Cases

Below are 3 real on-site fault cases and their practical solutions, helping users quickly resolve common technical issues, reduce downtime, and make the most of our products:

Case 1: Hydraulic Cylinder (121784) Oil Leak and Reduced Performance

Fault Phenomenon: A construction company reported that the CYLINDER, HYD, LINK TILT, ASSY 121784 was leaking hydraulic oil, leading to reduced tilting force and slower operation. Solution: Inspect the cylinder and find that the rod seal (72220) was worn and cracked. Replace the rod seal and wiper ring (72221), clean the cylinder rod, and refill the hydraulic system with fresh oil. After replacement, the leak stopped, and the cylinder regained full performance. Cause Analysis: Normal wear and tear on the rod seal, exacerbated by dust and debris. Suggestion: Inspect cylinder seals monthly and clean the rod regularly to prevent debris buildup.

Case 2: Self-Lubricating Bearing (118844-16-8) Seizure and Mechanical Jamming

Fault Phenomenon: A gate system operator reported that a BEARING, SELF LUBRICATING, 1.000 ID X .500 LG 118844-16-8 seized, causing the gate to jam and become inoperable. Solution: Disassemble the bearing and find it was clogged with dust and debris, preventing self-lubrication. Clean the bearing housing, replace the bearing with a new 118844-16-8, and install a dust cover to prevent future debris ingress. After repair, the gate operated smoothly. Cause Analysis: Dust and debris contaminated the bearing, blocking the self-lubricating matrix. Suggestion: Clean self-lubricating bearings monthly and install dust covers in dusty environments.

Case 3: Fastener Loosening (50008-12-CD5) and Linkage Misalignment

Fault Phenomenon: A manufacturing plant reported that SCREW, CAP-HEX HEAD 50008-12-CD5 fasteners securing a crank lever (30120659) had loosened, causing linkage misalignment and mechanical vibration. Solution: Remove the loose screws, clean the threads, and reinstall them with WASHER, LOCK 50908-C for anti-loosening protection. Torque the screws to the specified value (45 N·m) and install lockwire on the drilled shank screws (117989) for additional security. After repair, the linkage alignment was restored, and vibration stopped. Cause Analysis: High vibration caused the screws to loosen, as lock washers were not initially used. Suggestion: Always use lock washers and lockwire for fasteners in high-vibration applications.

FAQ (Frequently Asked Questions)

Purchase Guide

We specialize in the production and supply of all the industrial components mentioned above, including the HYDRAULIC LINK TILT CYLINDER 121784, SELF-LUBRICATING BEARING 118844-16-8, CAP-HEX HEAD SCREW 50008-12-CD5, HYDRAULIC SEALS 72219/72220, and all other models. All products are manufactured in strict accordance with international industrial standards, with complete quality inspection reports, exclusive performance data, and compatibility guarantees, ensuring they match your equipment perfectly. Whether you need replacement parts for maintenance, components for new equipment assembly, or customized solutions for specific industrial needs—including low-maintenance self-lubricating components and high-pressure hydraulic parts—we can provide high-quality products at competitive prices. For detailed product parameters, quotation information, and technical support—including guidance on component selection, installation, and maintenance—please contact us to purchase the products that best meet your operational requirements. We are committed to providing reliable products and professional services to help you reduce maintenance costs, avoid downtime, enhance operational efficiency, and extend the service life of your industrial equipment.

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Emeil: [email protected]   whatsapp: +86 15275658619

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