Features of Fatigue Testing Machine SM-1417

• Advanced benchtop fatigue testing unit for laboratory applications.
• Designed to study fatigue strength under cyclic bending loads.
• Demonstrates sinusoidal variation of bending stress in rotating specimens.
• Enables preparation and analysis of Stress-Number (S-N) diagrams.
• Suitable for practical demonstration of material fatigue principles.
• Provides hands-on learning for mechanical and civil engineering students.
• Compact and durable industrial-standard laboratory equipment.
• Automatic shutdown system ensures operational safety after specimen fracture.
• Digital electronic counter for accurate load cycle measurement.
• Contactless inductive speed sensor for reliable RPM monitoring.
• Adjustable loading system using threaded spindle and hand wheel.
• Includes multiple specimens for comparative fatigue analysis.

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Working Principle

The machine operates using a rotating cylindrical metal specimen that is clamped at one end and subjected to cyclic bending loads. A spring balance and movable bearing arrangement apply force to the specimen while it rotates continuously.

As the test bar rotates, alternating tensile and compressive stresses are generated, creating cyclic bending stress conditions. Over time, these repeated stress cycles cause microscopic cracks to form and propagate within the material, eventually leading to specimen fracture due to fatigue failure.

The integrated digital counter records the total number of stress cycles and revolutions until fracture occurs. This allows users to accurately study fatigue life and create S-N curves for engineering analysis.

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Educational & Laboratory Applications

The Fatigue Testing Machine SM-1417 is ideal for:

• Mechanical Engineering Laboratories
• Civil Engineering Material Labs
• Strength of Materials & Structures Experiments
• Polytechnic and Technical Institutes
• Engineering Universities
• Research & Development Centers
• Industrial Training Laboratories

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Experiments That Can Be Performed

Fatigue Strength Analysis

Study the fatigue strength of metal bars subjected to cyclic bending loads.

Influence of Surface Finish

Demonstrate how different surface finishes affect fatigue life and material durability.

Effect of Notching

Analyze the influence of notch geometry and curvature radii on fatigue strength.

S-N Diagram Preparation

Record stress cycles and generate Stress-Number (S-N) curves for fatigue analysis.

Material Failure Observation

Observe real-time fatigue fracture and crack propagation behavior.

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Technical Specifications

Motor

• Speed: 2800 RPM
• Output Power: 0.37 kW

Load Capacity

• Load Range: 0 – 300 N

Power Supply

• Three Phase Power Supply

Load Cycle Counter

• Electronic Counter
• 8-Digit Digital Display

Speed Measurement

• Contactless Inductive Speed Sensor

Test Bars

• Materials: Brass & Mild Steel
• Length: 110 mm
• Diameter: 8 mm

Specimen Holder

• Hexagonal Type Holder

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Included Accessories

• 3 Cylindrical Steel Specimens (Ck35)
• Special Shape Specimens
• Notched Specimens
• Surface Finish Demonstration Specimens
• Digital Counter System
• Adjustable Loading Assembly

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Advantages of SM-1417 Fatigue Testing Machine

• Accurate fatigue life measurement
• Easy operation for students and instructors
• Industrial-standard construction quality
• Reliable digital monitoring system
• Safe automatic shutdown functionality
• Excellent demonstration capability for engineering concepts
• Helps improve understanding of structural material behavior
• Suitable for repeated laboratory experiments