Martin Engineered Class Pulleys Are Manufactured with the Following Processes

EMD Engineered Mine Duty ENGINEERED TD Turbo Disc TB T-Bottom CLASS PULLEYS DSP Dead Shaft Pulley

Member Engineered Pulley Design

Martin Engineered Pulleys are Designed to Provide Long Life and Reliability

Martin Engineered Class Pulleys are manufactured with the following processes:

• Full penetration weld using a high-strength The Martin Engineered Class Pulley (ECP) line is not submerged arc process limited to just high tonnage and extreme applications. • Keyless locking device reduces stress at the pulley-to- This class of pulley can be used effectively in every shaft assembly, eliminating a keyway failure industry to ensure optimum performance and pulley • CNC Machining of end-discs and shafts longevity. The Conveyor Equipment Manufacturers Association (CEMA) defines Engineered Class Pulleys as • Ultrasonic Tested Weldment is available “One which has been specifically designed to meet load • Magnetic Particle Testing Weldment is available conditions of a particular conveyor pulley”. • Thermal Stress Relieving ensures each component in the pulley operates as a pulley system • Static Balancing is standard and Dynamic Balancing is available • Integral hub, profiled, turbine and T-Section end disc designs

Traditional Welded Hub Pulley Design Engineered Class Pulley Design

Fillet Weld Full Penetration Weld

Disc Machined to Weld-on Hubs TURBO-DISC Proﬁle

Keyless Bushing

Traditional drum pulley has fillet weld at the Engineered drum pulley with full penetration weld connection of end-disc to shell and end-disc to hub. that provides added strength at high stress points. Additionally, the keyless locking device reduces stress at the pulley-to-shaft connection, eliminating weld failure. 2 Engineered Class Pulley Engineered Pulley Design

Stress Balanced Design

Engineering Engineering Data Required:

The diagram below represents the flexible design • Belt Tensions (T1 + T2) featured in our Engineering Class Pulleys. As the load • Belt Conveyor Configuration is applied, the rim, end-discs, keyless lockers, and the • Belt Wrap on Pulley shaft, all operate in unison, so as to not introduce • Conveyor Length stress risers. • Belt Speed LOAD • Conveyor Incline DRUM • Motor HP END-DISC • Counter Weight SHAFT PILLOW BLOCK • Bearing Centers

KEYLESS BUSHING

Bending Moment Transmitted by the Pulley End-Disc

Bending Momentum Transmitted by the Shaft

Illustrative purposes only. Not reflective of actual loads.

Specifications

Martin’s Engineered Class Pulleys (ECP) are available as: ECP’s feature: • EMD (Engineered Mine Duty) • Keyless locking devices (single engagement in EMD and TD, double engagement in TB’s) • TD (Turbo Disc) -- Higher contact pressures for • TB (T-Bottom) greater torque transmission • DSP (Dead Shaft Pulley) -- No backlash due to fit tolerances -- Ability to adjust axial position and angular timing • Full penetration weld in rims and end-disc to rim • Weldless hub design, allowing for pre- stress elimination at lockers • Profiled end-disc (in Turbo Disc & T-Bottom) • No center discs • Statically balanced

Engineered Class Pulley 3 Pulley Types

Engineered Engineered EMD Mine Duty TD Turbo-Disc

• Solid Plate End-Discs with backing rings to • One Piece Machined and Profiled End-Disc support reaction forces of keyless locking elements with a custom engineered radius at the transition between the locking element and the rim • Full Penetration Weld between end-discs and rim. Pre-qualified weld joint to proper AWS specification, • Full Penetration Weld between end-discs and rim. applied by certified welders with semi-automatic, Pre-qualified weld joint to proper AWS specification, submerged arc welding equipment applied by certified welders with semi-automatic, submerged arc welding equipment • Full Penetration Longitudinal Weld in rim • Full Penetration Longitudinal Weld in rim • End-Discs are Welded Internally and Externally to the rim • End-Discs are Welded Internally and Externally to the rim • Single Engagement Keyless Locking Device for improved torque and bending • Single Engagement Keyless Locking moment transmission without reducing Device for improved torque and bending shaft strength by adding keyways moment transmission without reducing shaft strength by adding keyways • TIR/Runout specification is kept to under .125" • TIR/Runout specification is kept to under .060" • Statically Balanced • Statically Balanced • Machined Face is Available • Machined Face is Available • Two Year Warranty • Two Year Warranty

4 Engineered Class Pulley Pulley Types

Engineered Dead TB T-Bottom DSP Shaft

• Integral Rim and Double Profiled End-Disc • Problem Solving Design for heavy contamination, with submerged arc weldment fusing T-Bottom space restrictions, reduced moment arm at end-discs with rim bearings

• Full Penetration Weld between end-discs and rim. • Spherical Roller Bearings feature double Pre-qualified weld joint to proper AWS specification, lip seals for contamination protection applied by certified welders with semi-automatic,

submerged arc welding equipment • Lubrication Through Shaft while pulley is rotating. Sealed for life designs are available for heavy-duty • Full Penetration Longitudinal Weld in rim applications

• Double Engagement Keyless Locking • Inner Grease Tube in place of backside bearing Device for maximized torque and bending seals to prevent grease from entering pulley shell moment transmission without reducing instead of lubricating the bearing shaft strength by adding keyways • Support Pedestals are sized to replace standard • TIR/Runout specification is kept to under .030" or existing pillow blocks. Same bolt pattern and shaft height. Shaft held in pedestals with keyless • Statically Balanced locking device Mac • hined Face • Drum Pulley Available T • wo Year Warranty • Two Year Warranty

Engineered Class Pulley 5 Custom Capabilities

Martin Engineered Pulleys are Complete Custom Solutions

Available options include: • Lagging • Mounted Bearings -- 45/60/90 Durometer SBR • Machined Shafting -- MSHA (Mine Safety & Hazard Administration) -- Available in these Common Grades: Approved Lagging for Underground Applications 1045 CF, 1045 HR, 4140, Stainless Steel -- Ceramic Lagging (Hot Vulcanized) • Shaft Couplings -- AR – Abrasive Resistant Lagging • External Backstops -- SOF (Static Conductive/Oil Resistant/ • Fully Assembled Drive Packages Flame Resistant) Lagging -- EPDM -- Molded Urethane Lagging

6 Engineered Class Pulley Nomenclature

EMD — Engineered Mine Duty TD — Turbo Disc

r r M - ieere Mie rb i

2 digits, example: 2 digits, example:

3 digits, example: 3 digits, example:

(Metric or Standard) (Metric or Standard) 3 digits, example: 3 digits, example: mm mm

In 16th, 2 digits, example: In 16th, 2 digits, example:

TB — T-Bottom DSP — Dead Shaft Pulley

r r -m e

2 digits, example: rm i

3 digits, example: 2 digits, example:

3 digits, example: (Metric or Standard) 3 digits, example: mm eri ie e

In 16th, 2 digits, example: In 16th, 3 digits, example:

Engineered Class Pulley 7 There's a Martin Near You

Martin has over 30 locations in North America.

For more information contact a branch near you:

USA MEXICO

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