Structure of Double Pitch Conveyor Chain

A double pitch conveyor chain consists of inner plates, outer plates, pins, bushings, and rollers. Its basic structure is similar to a standard roller chain, but the pitch is extended to twice the length.

According to roller configuration and application requirements, double pitch conveyor chains are mainly divided into the following types:

S Type Double Pitch Conveyor Chain (Small Roller)

S type chains use rollers with the same diameter as standard short pitch roller chains, while the pitch is doubled.

Common models include:

·C2040 (Pitch 25.4 mm) 

·C2050 (Pitch 31.75 mm) 

·C2060 (Pitch 38.1 mm) 

They are mainly used in applications where the chain is driven by sprockets.

R Type Double Pitch Conveyor Chain (Large Roller)

R type chains are equipped with larger diameter rollers, allowing the chain to directly run on conveyor tracks or support rails.

Common models include:

·C2042 

·C2052 

·C2062 

They are widely used in conveyor systems requiring smooth material transportation.

D Type Extended Pin Conveyor Chain

D type chains feature extended pins, allowing the installation of customized attachments, flights, or supporting components.

They are suitable for special conveying applications requiring customized structures.

Common Attachments for Double Pitch Conveyor Chains

Double pitch conveyor chains can be equipped with various attachments to meet different conveying requirements.

Common attachment types include:

Attachments allow the chain to transport different products while improving flexibility in conveyor design.

Material Selection of Double Pitch Conveyor Chain

The performance and service life of a conveyor chain largely depend on material selection and heat treatment.

Chain Plates – Carbon Steel

Chain plates are commonly manufactured from high-quality carbon steel such as:

·40Mn 

·45Mn 

·45# steel 

The materials provide good strength, toughness, and resistance against impact loads.

Pins and Bushings – Case Hardening Steel

Pins and bushings are typically made from carburizing steels such as:

·20Cr

·20CrMnTi

After carburizing and heat treatment, the surface hardness is increased while maintaining a tough core structure.

This improves:

·Wear resistance

· Fatigue strength

·Service life

Rollers – Hardened Steel

Rollers are commonly manufactured from:

·45# steel 

·40Cr steel 

·Carburizing steel 

Heat treatment improves surface hardness and reduces wear during continuous operation.

Manufacturing Process of Double Pitch Conveyor Chain

High-quality double pitch conveyor chains require precise manufacturing processes to ensure stable operation and long service life.

Chain Plate Manufacturing

The chain plates are produced through precision stamping processes.

Main steps include:

·High-precision die stamping 

·Hole position control 

·Flatness inspection 

·Deburring treatment 

Proper plate accuracy ensures smooth chain assembly and reduces running vibration.

Pin and Bushing Manufacturing

Pins and bushings are manufactured through precision machining and heat treatment.

Typical processes include:

·Cold heading or CNC machining 

·Carburizing and hardening 

·Grinding and finishing 

These processes ensure accurate dimensions and reliable wear resistance.

Chain Assembly and Inspection

During assembly:

·Components are accurately matched 

·Chain articulation is checked 

·Lubrication condition is controlled 

·Final inspection is performed before shipment

Applications of Double Pitch Conveyor Chains

Due to their lightweight structure and economical design, double pitch conveyor chains are widely used in various industries.

Packaging Industry

Used in:

Food packaging lines 

Pharmaceutical packaging equipment 

Consumer goods production lines 

They provide stable transportation for lightweight products.

Logistics and Warehousing

Applied in:

Automated sorting systems 

Conveyor transfer equipment 

Warehouse handling systems

Agricultural and Industrial Equipment

Used for:

Grain and feed transportation 

Painting lines 

Cleaning systems

Assembly Automation

Suitable for:

Electronics assembly lines 

Appliance manufacturing 

Light-duty production conveyors