CEMA Technical Paper 2025-01

This free CEMA Technical Paper defines motorized pulleys (drum motors) and explains how internally powered conveyor drive systems compare with traditional external drive configurations.

The paper outlines the defining features of motorized pulleys, including hermetically sealed oil-filled construction, internal AC motor and gearbox design, heat dissipation through the pulley shell, and compatibility with VFD, soft-start, or across-the-line starting methods.

Applications are reviewed across both bulk material handling (mining, recycling, cement, aggregate, ports, underground conveyors) and food processing and unit handling (sanitary washdown systems, packaging, airport baggage handling, grocery checkout systems). The paper also outlines available options including lagging styles, backstops and brakes, stainless steel finishes, labyrinth seals, internal encoders, and electrical termination configurations.

• Document Type: Technical Paper

• Document Number: 2025-01

• Committee: Conveyor Pulley Committee

• Authors: Mike Gawinski and Benjamin Brewer (Douglas | Rulmeca)

• Intended Audience: Engineers, system designers, integrators, maintenance professionals

• Applies To: Bulk material handling and unit handling conveyor systems

• Publication Year: 2025

• Length: 7 pages

• Cost: Free

The post Motorized Pulleys: Definition, Characteristics, Applications appeared first on CEMASTORE.

The document highlights important tradeoffs, such as reduced working loads and speed limitations for stainless steels compared to heat-treated carbon steel chains, and provides guidance on matching chain materials to environmental exposure, regulatory requirements (including food-handling considerations), and operational demands.

This paper is intended to support informed decision-making and encourages consultation with chain manufacturers for unique or demanding applications. It is provided free of charge as a service to the conveying industry.

• Document Type: Technical Paper

• Committee/Section: Conveyor Chain and Sprocket Section

• Author: Rich Neuhengen, Timken Drives

• Intended Audience: Engineers, designers, maintenance professionals

• Applies To: Conveyor and power transmission chains in corrosive environments

• Publication Year: 2022

• Length: 4 pages

The post Corrosion Resistant Chains appeared first on CEMASTORE.

Pages: 8
Published Date: February 2023
Summary of Contents: Purpose, Definitions, Human Factor Considerations, General Design Parameters, Application, Controls, Additional Configurations

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The post Design and Safe Application of Crossovers and Crossunders for Bulk Handling Conveyors – CEMA SBP No. 06 appeared first on CEMASTORE.

Pages: 11
Published Date: February 2023
Summary of Contents: Scope, Introduction, Defintions, Causes of Belt Fires, Determining the Fire Retardancy of Belting, Best Practices Conveyor Fire Prevention, Maintenance and Operation

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The post Safety Guide No. 07 Conveyor Belt Fire Safety appeared first on CEMASTORE.

Pages: 12
Published Date: February 2023
Summary of Contents: Introduction, Defintions, Application, Backstop Types, Commissioning, Safe Operation, Field Inspection, Repair, More Information

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The post Safety Guide No. 08 Commissioning, Safe-Operation, and Field Inspection of Backstops appeared first on CEMASTORE.

This Guide provides mistracking design and maintenance allowances on fixed-in-place heavy-duty (> 28 N/mm [160 PIW]) bulk material handling troughed conveyors. The allowances are applicable to CEMA standard troughed conveyors with fabric or steel cord belts.

The tolerances in this document are intended to communicate expectations to both the design engineer as well as the installation and maintenance personnel for a conveyor system utilizing standard CEMA components.

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The post System Mistracking Allowance Guide appeared first on CEMASTORE.

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The post Design and Application of Spill Guarding for Unit Handling Conveyors appeared first on CEMASTORE.

An inclined screw conveyor is arranged to convey bulk material up an inclined path and is often very desirable as it may solve a conveying problem with a minimum of equipment and occupy a minimum of space.  

A vertical screw conveyor is one that conveys material upward in a vertical path. Vertical screw conveyors are sometimes called “lifts” or “elevators,” but such names are ambiguous. They require less space than some other forms of elevating conveyors. 

The post Inclined and Vertical Screw Conveyors – Best Practices Guide 2021 appeared first on CEMASTORE.

The report also includes a general technical note on chordal action, explaining its causes, effects on wear and vibration, and methods to minimize it through proper sprocket selection and system design. While not exhaustive, the document addresses the sprocket types most commonly encountered in typical industrial conveyor applications.

This publication is advisory in nature and is provided free of charge as a service to the conveying industry.

• Document Type: Technical Report

• Committee/Section: Conveyor Chain and Sprocket Section

• Intended Audience: Engineers, designers, maintenance professionals, system integrators

• Applies To: Conveyor chains and belt-driven conveyor systems

• Approval Date: March 2019

• Length: 11 pages

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The post Technical Report 2019-01 – Conveyor Chain Sprocket Types and Definitions appeared first on CEMASTORE.

Pages: 19
Published Date: 2019, Revision April
Summary of Contents: Introduction, General Safety Precautions, Common types of chain failures along with the associated causes and recommended corrections. Additionally; there are Installation/Maintenance Guides for the following: Engineered Class Chain, Forged Conveyor Chain, Chain Drive Wire Mesh Belt, and Plastic Conveyor Chain.
Revision: Added General Technical Note on Chordal Action.

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The post Conveyor Chain Installation, Maintenance & Best Practices-001 appeared first on CEMASTORE.