Industrial chains & sprockets

Industrial Chains and Sprockets

Drive parts for apron feeding, vertical lifting and drag conveying

Heavy-duty industrial chains require more than a visual match. Links, pins, bushings, rollers, attachments and sprockets form a meshing system. Pitch, width, tooth profile, centreline, heat treatment and lubrication must be compatible.

Main Products Links, pins, bushings, rollers, connectors and sprockets

Equipment types Apron feeders, bucket elevators, scraper conveyors and drag chain conveyors

Main Loads Heavy traction loads, shock loading at startup, articulation wear and tooth contact

Identification requirements Full model, chain reference, pitch, drawing number, mating sprocket and wear records

Heavy-duty apron feeder chain link; confirm chain type, pitch, pin-and-bushing design and lubrication from installation information

System scope

Check chains and sprockets as a matched meshing system

Chain pitch elongation, pin-and-bushing wear and sprocket tooth-space wear interact. Measure the mating component before replacing only the chain or sprocket, to avoid pitch mismatch, impact engagement and rapid wear.

Apron feeder tractor chains, elevator conveyor chains and drag chains differ in structure and operation. Tensioners, drive and tail shafts, flights and bucket attachments are associated parts that require checks within the same drive system.

Chain geometry Pitch, inner width, pin diameter, bushing diameter, rollers and attachment holes

Sprocket geometry Tooth count, pitch circle, tooth profile, hub, bore and key connection

Installation relationships Centre distance, twin-chain synchronisation, shaft alignment, take-up travel and guides

Operating conditions Load, speed, impact, lubrication, dust and corrosion

Apron Feeder

Heavy-duty tractor chains, pins, bushings, sprockets and tensioners

Apron feeders handle heavy loads of large, abrasive or wet and sticky material. Check the chain system together with rollers, pans and the drive shaft.

Chain Link

Heavy-duty chain bodies that pull the pans. Check chain type, pitch, left/right chain, attachment interfaces and original heat treatment.

Chain Pins / Bushings

Form the link articulation. Surface wear resistance, core load capacity, fits, sealing and lubrication must all meet requirements.

Drive Sprockets / Traction Wheels

Transmit drive-shaft torque to the chain. Check tooth count, pitch circle, split design, hub and alignment on both sides.

Chain Tensioner

Maintain the required tension and tail position. Check take-up travel, synchronisation on both sides, guides and travel limits against the machine design.

Lifting and Drag Conveying

Bucket elevator and drag conveyor chain systems

Vertical lifting and horizontal drag conveying use different attachments and return arrangements, with different impact and dust exposure.

Bucket Elevator Chain Links

Carry cyclic traction loads from buckets and material. Check single/twin-chain arrangements, bucket attachments, pitch and sprockets.

Bucket Elevator Sprockets

Head drive or tail guide sprockets. Match tooth profile, split design, shaft bore, key and chain wear condition.

Drag Conveyor Chain Links

Pull flights and material through the trough. Check chain type, connectors, flight spacing, wear guides and return arrangement.

Chain Connectors

Join chain sections and allow disassembly. Match shape, locking, orientation, strength and link fit.

Head Drive Sprockets

Align with the drive shaft, chain and housing centreline. Check tooth-space wear, shaft bore, key and split connections.

Drag Chain Conveyor Flight

Chain attachments, separate from the links themselves. Check chain attachment holes, trough, temperature and abrasive duty together.

Materials and Processes

Different parts in one chain system require different surface and core properties

Confirm steel grade, hardness and heat treatment for the chain type, part position, loads and drawings.

Links and side plates Check overall strength, fatigue, hole-area loading and dimensional stability. Confirm material, forging or casting route and heat treatment against chain type and OEM specifications.

Pins and bushings Working surfaces need wear and pitting resistance, while the core withstands bending and impact. Control the depth of carburised, induction-hardened or other hardened layers.

Sprocket tooth surfaces Balance tooth-surface hardening, root toughness and hub load capacity. Integral, split and replaceable-tooth designs require different manufacturing approaches.

Flights and attachments Carry traction connection loads and may rub directly against material and the trough. Check the body, wear edges and connection holes by zone.

Matching and Failure Analysis

Use wear locations to assess chain–sprocket interaction

An abnormality in links, pins, bushings or sprockets changes load distribution through the chain system.

Symptoms	Priority checks	Associated Risks
Pitch elongation	Pin-and-bushing wear, lubrication, dust ingress, loading and sprocket tooth spaces	Impact engagement, tooth jumping and rapid tooth-root wear
Faster wear on one chain	Twin-chain synchronisation, shaft alignment, centre distance, uneven pan/flight loading and guide rails	Mistracking, attachment cracking and local overload
Uneven sprocket tooth wear	Chain pitch, shaft alignment, tooth profile, hub and bearing clearance	Concentrated loading and drive vibration
Pin or bushing spalling	Hardened layer, lubrication, fit, contamination, surface defects and impact	Stiff articulation, increased clearance and fatigue fracture
Loose connectors	Assembly orientation, locking structure, hole pattern, material and repeated disassembly	Chain separation, detached flights and equipment damage

Inquiries and Quality Control

Information for Chain and Sprocket Supply

Provide in-service measurements of both chain and sprocket to support a matched replacement assessment.

Equipment and chain reference

OEM, full model, serial number, chain model, left/right chain and installation position.

Chain dimensions

Pitch, inner and outer widths, pin and bushing diameters, rollers, attachments and section length.

Sprocket dimensions

Tooth count, pitch circle, outside diameter, tooth profile, hub, shaft bore, key and split arrangement.

Materials and heat treatment

Base material, hardening method, surface and core requirements, case depth and inspection method.

System condition

Centre distance, take-up travel, shaft alignment, sprocket wear, twin-chain synchronisation and guides.

Operating conditions

Load, speed, starts/stops, feed material, dust, temperature, lubrication and current service life.

Lining selection: Metso and FLS apron feeder literature treats heavy-duty chains, pins, bushings, sprockets, main shafts and take-up systems as related components. FLS specifications also show different chain pitches and sprocket pitch diameters for different feeder sizes. Confirm replacements using the full model and installation drawings. Metso Apron Feeder Parts · FLS Apron Feeder

Related Equipment and Parts

Equipment, Parts, Materials and Drawing References

Find the part by OEM model or general equipment structure, then check drawing numbers, dimensions and materials.

Apron Feeder Chains, pans, rollers, drives and tensioning systems. Apron Feeder Chain Links Model, drawing number, pitch, material and installation checks. Drag Conveyor Chain Links Relationships between connectors, flights, head and tail sprockets, and the trough. OEM Brands & Models Identify the chain system by brand and full equipment model.

Request an industrial chain and sprocket proposal and quotation

Provide the equipment model, chain reference, drawing number, sprocket parameters, material, wear measurements and operating conditions for technical review and quotation.

Send Details for a Quote

Manufacturing Services in China

From Technical Assessment to Finished-Part Delivery

Technical advice, supplier introductions, quality control and finished-part delivery.

Technical Advice

Check chain type, pitch, meshing, materials and failures.

Supplier Introductions

Match requirements to forging, casting, heat treatment and precision machining resources.

Quality Control

Monitor materials, hardened layers, dimensions, matched sets and trial assembly.

Finished-Part Delivery

Deliver complete sets by chain section, mating sprocket and installation number.