Scraper Conveyor

A scraper or drag-chain conveyor uses flights attached at intervals along a chain to move bulk material through a trough, horizontally or on an incline. It is widely used in underground coal mining, cement, power and metallurgy. Wear parts are concentrated in the flights, chains and trough system.

Scraper Conveyor

Equipment Section View

Scraper conveyor sectional reference diagram
Scraper conveyor sectional reference diagram

A scraper or drag-chain conveyor uses flights attached at intervals along a chain to move bulk material through a trough, horizontally or on an incline. It is widely used in underground coal mining, cement, power and metallurgy. Wear parts are concentrated in the flights, chains and trough system.

Equipment Parts

Part Identification and Technical Details

Explore part names, images, material options and technical requirements. Select a card to open the corresponding replacement part page.

Major Components and Assemblies

Major Components and Assemblies

Individual and Maintenance Parts

Individual and Maintenance Parts

Scraper Flight / Scraper Plate
01

Scraper Flight / Scraper Plate

Scraper Blade / Flight Bar

Material Options
Mn13 manganese steel / Hardox 500
Installation and Function
Scraper flight that moves the material forward
Maintenance Category
High
Chain Link
02

Chain Link

Chain Link

Material Options
23MnCrMo5 / 30CrNiMo alloy steel
Installation and Function
Heavy-duty chain that drives the scraper flights
Maintenance Category
ZH
Chain Pins and Bushings
03

Chain Pins and Bushings

Chain Pin / Bushing

Material Options
Case-hardened alloy steel / ceramic inserts where specified by the pin design
Installation and Function
Wear parts at the chain joints
Maintenance Category
High
Chain Connector
04

Chain Connector

Chain Connector

Material Options
Alloy Steel
Installation and Function
Connects chain sections
Maintenance Category
ZH
Trough Liner / Bottom Plate
05

Trough Liner / Bottom Plate

Trough Liner / Bottom Plate

Material Options
High-Manganese Steel / Hardox 400
Installation and Function
Protects the trough bottom from material wear
Maintenance Category
High
Side Wall Liner
06

Side Wall Liner

Side Liner

Material Options
Hardox 400 / Manganese Steel
Installation and Function
Protects the trough side walls
Maintenance Category
ZH
Drive Sprocket
07

Drive Sprocket

Sprocket / Head Wheel

Material Options
Alloy Steel 42CrMo
Installation and Function
Drives the chain
Maintenance Category
ZH
Tail Sprocket / Return Wheel
08

Tail Sprocket / Return Wheel

Tail Sprocket / Return Wheel

Material Options
Cast Steel ZG42CrMo
Installation and Function
Chain guide wheel at the tail end
Maintenance Category
ZH
Scraper Flight Bolt
09

Scraper Flight Bolt

Flight Bolt

Material Options
Property class 10.9 alloy steel
Installation and Function
Secures the scraper flights to the chain
Maintenance Category
High
Scraper Wear Tip
10

Scraper Wear Tip

Scraper Wear Tip

Material Options
Cemented Carbide / Ceramic
Installation and Function
Replaceable wear tip at the bottom of the scraper
Maintenance Category
High
Guide Rail
11

Guide Rail

Guide Rail

Material Options
Carbon steel / wear-resistant steel plate
Installation and Function
Guide track for the chain return run
Maintenance Category
ZH

Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, OEM drawing number and measured dimensions before ordering or manufacture.

Material Information

  • Mn13 manganese steel: approximately 11-14% Mn, with impact-induced work hardening for large-lump impact duties.
  • Hardox 400/500 are candidate wear-resistant plate grades. Confirm hardness against the specific product, thickness and material certificate.
  • Confirm chain material and heat treatment against chain type, size, breaking load, fatigue requirements and OEM specifications.
  • Check pin diameter, fit, surface treatment and impact-fatigue requirements against the actual chain design. Do not add inserts without supporting design drawings.

Brand Applicability

Caterpillar (CAT), Joy Global / Komatsu Mining, Sandvik, BEUMER, Aumund, Tsubaki, Tinken

Industry Applications

Underground coal transport, cement raw-material conveying, power-plant ash and slag handling, sinter conveying and bulk grain handling.

Materials for similarly named parts may differ by OEM, machine model and operating conditions. Confirm the machine model, OEM drawing number and measured dimensions before ordering or manufacture.

Equipment Manufacturers and Series

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01

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04

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