Hollow Pin Conveyor Chains (ZC Series)

Hollow Pin Conveyor Chains（ZC Series）

*Q Higher breaking load with hardened plates

*Q: Placas endurecidas, mayor carga de rotura

1. Core Definition & Product Overview

2. Key Design & Structural Features

2.1 Core Structural Components

• Hollow Pins: Cold-drawn alloy steel (40Cr) with a smooth internal bore (tolerance ±0.02mm) and case-hardened surface (HRC 58-62) for wear resistance; available in bore diameters from 8mm to 30mm (per chain size).

• Inner/Outer Link Plates: High-strength carbon steel (50Mn) with quenched and tempered heat treatment (HRC 40-45) to withstand impact and tensile loads; stamped with CNC dies for dimensional consistency.

• Bushings & Rollers: Seamless steel bushings (interference-fit with inner plates) and hardened steel rollers (for low-friction engagement with sprockets); sealed lubrication options available for dust/waterproof performance.

• Connecting Links: Drop-forged carbon steel connecting links with cotter pins or spring clips for easy installation/removal; compatible with all ZC Series chain sizes.

2.2 Unique Advantages (vs. Standard Solid Pin Conveyor Chains)

3. ZC Series Technical Specifications

Additional Performance Parameters

• Operating Temperature: Standard grade: -20℃ to +150℃; High-temperature grade: -40℃ to +250℃ (with heat-resistant lubrication)

• Lubrication Options: Oil bath, grease injection, sealed self-lubricating (PTFE-impregnated bushings)

• Corrosion Resistance: Optional zinc plating, Dacromet plating, or stainless steel construction (for wet/corrosive environments)

• Service Life: ≥8,000 hours (under rated load, proper lubrication, and alignment)

4. Typical Applications & Attachment Configurations

4.1 Core Attachment Types (Easily Installed via Hollow Pins)

• Crossbar Attachments: Steel bars inserted through hollow pins for conveying pallets, boxes, or bulk containers.

• Cleat Attachments: Angled plates mounted on pins to prevent material sliding on inclined conveyors (e.g., grain, gravel).

• Bracket Attachments: Custom brackets for holding fixtures, tooling, or product carriers in automated assembly lines.

• Pin Stop Attachments: Removable pins for indexing or stopping workpieces at specific conveyor stations.

4.2 Industry Applications

• Automotive Manufacturing: Conveying car body components, engine parts, and assembly line workpieces (custom bracket attachments).

• Food & Beverage: Handling crates, pallets, and bulk ingredients (stainless steel ZC Series for washdown environments).

• Construction & Mining: Conveying aggregates, gravel, and construction materials (heavy-duty ZC60B/ZC80B with cleat attachments).

• Warehousing & Logistics: Pallet conveyors, automated storage/retrieval systems (AS/RS), and parcel sorting lines.

• Recycling & Waste Management: Conveying mixed waste, plastic, or metal scrap (corrosion-resistant Dacromet-plated ZC Series).

• Packaging Machinery: Indexing conveyors for carton filling, sealing, and labeling (precision crossbar attachments).

5. Installation & Maintenance Guidelines

5.1 Installation Best Practices

1. Sprocket Alignment: Ensure sprocket shafts are parallel (misalignment ≤0.8mm/m) to prevent uneven wear on pins and bushings.

2. Attachment Installation: Insert attachment pins through hollow bores with a press fit (avoid hammering to prevent pin deformation); secure with lock washers or cotter pins.

3. Tension Adjustment: Maintain slack of 1-2% of chain length (e.g., 10-20mm for 10m chain) to avoid excessive tension on hollow pins.

4. Sprocket Matching: Use ZC Series dedicated sprockets (tooth profile optimized for hollow pin chain engagement) to maximize service life.

5.2 Maintenance Protocols

1. Lubrication: For standard grades, apply high-viscosity conveyor chain oil (ISO VG 150) every 500 operating hours; for sealed grades, inspect lubricant levels every 2,000 hours.

2. Inspection:

• Check hollow pin bore wear (replace if bore diameter increases by ≥0.1mm).

• Inspect link plates for cracks (use magnetic particle testing for heavy-duty applications).

• Verify attachment tightness (retorque/replace pins if loose) every 1,000 hours.

3. Replacement: Replace entire chain sections if ≥5% of pins show excessive wear; do not mix new/used chain segments (causes uneven load distribution).

6. Quality Assurance & Compliance

• Manufacturing Standards: Produced to ISO 606 (Roller Chains and Bush Chains) and GB/T 1243 (Chinese National Standard for Conveyor Chains) with full traceability of raw materials.

• Testing Requirements: Every batch undergoes:

1. Tensile strength testing (universal testing machine).

2. Dimensional inspection of hollow pin bore (CNC measuring equipment).

3. Wear resistance testing (accelerated life test rig).

4. Corrosion resistance testing (salt spray test for plated variants).

• Certifications: CE (for EU market), RoHS (environmentally compliant), and ISO 9001 (quality management system).