Conveyor Chains with Special Extended Pins

What Is an Extended Pin Conveyor Chain and How Does It Work?

An extended pin conveyor chain is a standard ISO 606 roller chain whose pins protrude beyond the chain sidebars on one or both sides. The protruding pins act as mounting points for attachments, fixtures, flights or article-carrying assemblies — the base roller chain itself keeps the same pitch, roller diameter and pin diameter as standard roller chain, so existing sprockets and drive systems remain compatible.

Why use extended pins instead of welding attachments onto a standard chain? Because the pin becomes the attachment axis. The attachment can pivot freely on the hardened pin, distributing load evenly across the chain and avoiding the stress concentration that welded or bolted attachments create. This is why extended pin chains are preferred in can curing ovens (UV and thermal), underground feeder/breakers, dozer trap feeders, submerged flight systems and bottling lines — applications where attachments must move with the chain and carry a load at the same time.

Raydafon extended pin conveyor chains are manufactured to ISO 606 and DIN 8188 standards in chain sizes 08B to 24B (pitch 12.7mm to 50.8mm) and ANSI 40 to 160. Standard pin types are D-1, D-3 and D-5. Base chain and pin materials include carbon steel, 42CrMo alloy steel, and SS304/SS316 stainless steel; extended pins are heat-treated for ductility and toughness. Custom pin lengths, diameters and spacing are available.

D-1 / D-3 / D-5 extended pin conveyor chain — ISO 606 / DIN 8188 compliant, 08B to 24B

Extended Pin Types — D-1 vs D-3 vs D-5 Comparison

The extended pin design allows attachments, fixtures or article-carrying assemblies to be mounted directly on the chain. Choosing the wrong pin type can cause attachment slippage, premature pin wear or interference with the sprocket. The three standard types below cover the majority of industrial conveying requirements.

Custom pin lengths, diameters and spacing are available. Pins can be arranged at specific intervals — for example, every 7 chain pitches — as required by the conveyor layout. Send your drawing for engineering review.

Technical Specifications — ISO 606 Extended Pin Conveyor Chains

All extended pin conveyor chains are manufactured to ISO 606 and DIN 8188 standards. The pitch is corrected at the outer link for extended pin chains to ensure accurate sprocket engagement.

Dimensions are nominal. Pin projection length and spacing can be customized to suit your conveyor layout. Contact us for detailed CAD files and engineering support.

Typical Applications — Can Curing Ovens, Feeders & Industrial Conveying

Extended pin conveyor chains are specified wherever standard roller chains cannot carry the required attachments or article-carrying assemblies. The extended pins provide a secure mounting point for fixtures, flights or conveyor plates.

How to Select the Right Extended Pin Chain — 6-Step Guide

1. STEP 1 Identify the conveyed product and load Can curing ovens require lightweight D-1 pins; heavy feeders need D-5 pins with longer projection and larger pin diameter.
2. STEP 2 Determine chain size and pitch 08B to 24B depending on load, speed and sprocket dimensions. Pitch is corrected at the outer link for extended pin chains.
3. STEP 3 Select extended pin type and projection length D-1 for single-sided mounting; D-3 for double-sided with locking groove; D-5 for long projection. Custom lengths available.
4. STEP 4 Specify pin spacing and arrangement Pins can be arranged at specific intervals — e.g., every 7 chain pitches — or as required by the conveyor layout.
5. STEP 5 Choose base chain material Carbon steel for general industrial; 42CrMo alloy steel for high load; SS304/SS316 for corrosive or wash-down environments.
6. STEP 6 Confirm quantity and delivery Provide quantity, destination port, and whether OEM branding or custom packaging is needed.

Why Choose Raydafon Extended Pin Conveyor Chains?

Ordering & Supply Information

Frequently Asked Questions