Product Overview

The hand chain is the primary operating component used to drive the pocket wheel of hand chain hoists and lever blocks. Designed specifically for manual pulling operations, our alloy steel hand chains feature strictly controlled link pitch, uniform wire diameter, and deburred smooth weld seams to ensure effortless pulling, zero chain jumping, and comfortable hand operation.

Unlike load-bearing chains, hand chain design prioritizes pitch consistency, surface smoothness, and corrosion resistance. Manufactured from selected alloy steel and treated with anti-rust coatings, our hand chains deliver long service life in industrial, maritime, and construction environments.

Technical Specifications

Wire Diameter (d)	Pitch Length (p)	Outer Width (b2)	Material	Tensile Force Rating	Weight (kg/m)	Standard Surface Finish
5.0 mm	23.0 mm	17.0 mm	Alloy Steel / Carbon Steel	>= 3.5 kN	0.48 kg	Bright Zinc Plated
5.0 mm	24.0 mm	17.5 mm	Alloy Steel / Carbon Steel	>= 3.5 kN	0.50 kg	Electro-Galvanized
6.0 mm	30.0 mm	20.0 mm	Alloy Steel	>= 5.0 kN	0.72 kg	Yellow Zinc / Chrome
6.0 mm	31.2 mm	20.5 mm	Alloy Steel	>= 5.0 kN	0.75 kg	Stainless Steel / Dacromet

Tolerance Control: Pitch length controlled within +/- 0.15 mm; Wire diameter controlled within +/- 0.08 mm.

Custom Options: Non-standard pitch lengths, custom link widths, and continuous drum packaging are available for OEM hoist manufacturers.

Key Features

Deburred Weld Joints for Ergonomic Hand Pulling
Hand chains are continuously pulled by operators. Rough weld seams can cause hand injury or snag on hoist chain guides.

100% Weld Flash Removal: Every welded joint undergoes automatic deburring and surface smoothing before finishing, ensuring a comfortable grip and zero snagging during rapid pulling.

Strict Pitch Calibration to Prevent Chain Jumping
Mismatched pitch causes hand chain jumping (skipping teeth), friction jam-ups, and operator fatigue.

Precision Cold Forming: Advanced CNC bending ensures exact pitch matching with hand wheels from global hoist brands, including KITO, Yale, CM, Harrington, Vital, and Elephant.

High Corrosion Resistance and Finish Options
Operating hand chains are frequently exposed to outdoor environments and sweaty hands.

Multi-Layer Surface Finishing: Options include Bright Electro-Zinc Plating (5 to 8 microns), Yellow Zinc, Dacromet, or Electrophoretic Black Paint, providing up to 96-hour to 500-hour salt spray corrosion protection.

Manufacturing and Quality Control Workflow

Wire Rod Inspection: Chemical composition analysis of raw steel wire coils.

Precision Cold Bending: CNC automatic forming for consistent link geometry.

Automatic Resistance Welding: Precision flash butt welding with inline temperature control.

Weld Flash Trimming: Mechanical deburring to guarantee a smooth outer profile.

Calibrated Stretching: Pre-stretching to set uniform pitch length across the entire batch.

Heat Treatment: Continuous tempering to balance material toughness and flexibility.

Surface Treatment: Plating / Coating application followed by anti-rust sealing.

Dimensional and Visual Audit: Pitch gauge check, weld inspection, and surface finish audit before spooling / packaging.

Applications

Alloy Steel Hand Chains are widely used in manual lifting equipment across many industrial sectors. include:

Manual chain hoists
Hand-operated lifting equipment
Industrial maintenance
Manufacturing plants
Warehousing and logistics
Construction sites
Shipbuilding
Mining operations
Equipment installation
Material handling systems

OEM and Custom Packaging Services

We supply operating hand chains tailored to OEM assembly line requirements:

Custom Length Pre-Cutting: Chains supplied pre-cut to exact loop lengths with connecting open links for quick hoist assembly.

Bulk Packaging: Wound on heavy-duty plastic spools or steel drums (500 m to 1000 m per drum) for high-speed factory handling.

Private Labeling and Documentation: Customized carton marking, barcode labels, and Material Test Certificates (EN 10204 3.1) included with every batch.

FAQ

Q: What is the main difference between a Hand Chain and a Load Chain?

A: A load chain is the primary load-bearing component that directly lifts the cargo and must comply with high-strength lifting standards (such as EN 818-7 Grade 80 or Grade 100). A hand chain is an operating chain used solely to turn the hoist hand wheel. It requires strict pitch accuracy and surface smoothness rather than heavy load-bearing capacity.

Q: How do I select the correct hand chain for my hoist wheel?

A: The two most critical dimensions are wire diameter (d) and inner pitch length (p). Measure your existing chain using a vernier caliper or provide the hoist brand and model to confirm pitch compatibility.

Q: Can hand chains be supplied as continuous open lengths or closed loops?

A: We offer both continuous lengths on drums and pre-cut loops fitted with an open connecting link for easy installation onto manual hoists.

Q: What surface finish is best for humid or marine environments?

A: For outdoor, marine, or highly humid applications, we recommend Hot-Dip Galvanized, Dacromet, or Stainless Steel (SUS304 or SUS316) finishes for maximum corrosion protection.

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