About DHA Roller Chain
EP Transmission is presented as one of China’s largest transmission component enterprises. The DHA Roller Chain site is built around a narrower promise: make roller-chain replacement easier to evaluate by combining dimensional data, application engineering, matched sprockets and wear-focused surface-treatment knowledge.
Chain-drive engineering, not an isolated component
A roller chain only performs correctly when it matches the sprocket and operating duty. We therefore discuss pitch, roller diameter, inner width, pin diameter, plate geometry, strand count, tooth count, alignment, lubrication and contamination together.
The uploaded 2017 catalogue covers drive chains, conveyor chains, engineering chains, agricultural chains, stainless chains, leaf chains and sprockets, and illustrates the individual components of a roller chain. That broad chain-drive context informs the structure of this specialist DHA site.
Our engineering workflow
Understand the machine
We start with the actual equipment, duty cycle, environment and current drive rather than selecting from a model list alone.
Measure the chain
Pitch, roller or bush diameter, inner width, pin diameter, plate dimensions and strand count establish the replacement envelope.
Match the sprocket
Tooth form, tooth count, bore, hub geometry and wear condition are reviewed with the chain.
Confirm maintenance
Lubrication, guarding, safe access and inspection practice complete the chain-drive plan.
Manufacturing perspective
The source catalogue shows a complete chain-manufacturing flow from material processing through component manufacture and assembly. Examples include continuous rolling of plate and bush material, roller cold extrusion, heat-treatment equipment, shot blasting, tooling and chain assembly. The same catalogue also illustrates inspection equipment for dimensional, wear, fatigue, length and surface checks.
Markets we support
The site is written for industrial buyers and engineers in Japan, Taiwan, the United States, Germany, Italy and other machinery-producing markets. Regional pages add local industry and regulatory context, while product dimensions remain consistent with the applicable chain geometry.
Bring us the existing drive
A chain number helps, but photos, measurements and sprocket details make a replacement discussion much more useful.
Customer Reviews & Case Studies
Precision OEM machinery
Use: Compact industrial drive.
Engineering note: Complete geometry review made the replacement discussion clearer than a pitch-only cross-reference.
Application fit ★★★★★
Machine building
Use: Guarded auxiliary transmission.
Engineering note: Chain and sprocket were handled as one maintenance package.
Application fit ★★★★★
Specialty equipment
Use: Intermittent precision drive.
Engineering note: Dimensional confirmation simplified integration into the existing machine.
Application fit ★★★★☆