EF-3.4 – Mechanisms – Bar Linkages


EF-3.4 – Mechanisms – Bar Linkages

The EF-3.4- Bar Linkages experiments kit comprises of different perforated bars or links configured into a range of different linkage mechanisms


The Engineering Fundamentals range enables students to gain an understanding of the principles of engineering by the process of learning via experimentation.

The EF-3.4- Bar Linkages experiments kit comprises of different perforated bars or links configured into a range of different linkage mechanisms, including four-bar linkages, rotary and linear movement and planar linkages allowing students to trace the relative movements of each linkage and joint.

A linkage is an assembly of links and joints that provide a desired output motion in response to a specified input motion.

One such example and one of the simplest moveable closed-chain linkages is the four-bar which consists of four bars or links connected in a loop by four joints and can be used for many mechanical purposes including converting rotational motion to reciprocating motion and converting reciprocation motion to rotational motion.

Engineering fundamentals system

The modular tray-based system is supplied in conjunction with a multifunctional work panel enabling the student to conduct their own experiments in subjects such as statics, dynamics, mechanisms and kinematics.

Each kit is supplied with a highly visual user-friendly operational guide, allowing the student to understand the theory of the subject by the application of practical experimentation.

Technical Specifications

Features & Benefits


  • Neatly presented in an easily identifiable and durable storage tray
  • Trays have clear lids making it easy to see their contents
  • Pictorial tray contents list to identify missing components easily
  • Accompanied by a detailed manual with various practical exercises
  • Clear and concise assembly instructions for each experiment
  • Multiple experiments per kit
  • Toolless assembly


  • Hands-on understanding from lessons
  • Improve the student’s dexterity by self-assembly with the instructions provided


  • Pantograph – observe that moving the pantograph linkage reproduces the motion of one point of the linkage at a second point, at an increased or decreased size
  • Principle steering motion using an Ackermann steering linkage
  • Four bar linkages
  • Straight line linkages
  • Drag link
  • Crank rocker
  • Double rocker
  • Parallelogram
  • Chebyshev linkage
  • Watt’s linkage
  • Peaucellier-Lipkin
  • Hart’s inversor
  • Roberts linkage

  •  EF-BU Base Unit

Statics Experiments

  • EF-1.1 Engineering Fundamentals Force
  • EF-1.2 Engineering Fundamentals Moments
  • EF-1.3a Engineering Fundamentals Beams
  • EF-1.3b Engineering Fundamentals Trusses
  • EF-1.4 Engineering Fundamentals Springs
  • EF-1.5 Engineering Fundamentals Torsion

Dynamics Experiments

  • EF-2.1 Engineering Fundamentals Friction
  • EF-2.2 Engineering Fundamentals Simple Harmonic Motion
  • EF-2.3 Engineering Fundamentals Rotational Friction
  • EF-2.4 Engineering Fundamentals Potential and Kinetic Energy
  • EF-2.5 Engineering Fundamentals Centrifugal & Centripetal Force

Mechanisms Experiments

  • EF-3.1 Engineering Fundamentals Cam, Crank and Toggle
  • EF-3.2 Engineering Fundamentals Mechanisms
  • EF-3.3 Engineering Fundamentals Additional Mechanisms
  • EF-3.4 Engineering Fundamentals Bar Linkages


  • EF- 4.1 Engineering Fundamentals Pulleys
  • EF- 4.2 Engineering Fundamentals Gears
  • EF- 4.3 Engineering Fundamentals Drive Systems


  • EF-WS Workstation
  • EF1-Spares

  • 13 – Hole linkage
  • 9 – Hole linkage
  • 7 – Hole linkage
  • 5 – Hole linkage
  • Removable pivot pin – short, medium, long
  • Stand – short, medium, long

  • EF-BU Base Unit

  • EF-BU on which to build the experiment from the tray components
  • Level and stable work surface to mount the EF-BU upon. The optional EF-WS is ideal for this if no suitable desk or bench is available.

Volume: 0.2m³ per tray

Gross Weight: 5.0kg per tray

Length: 0.43m per tray

Width: 0.312m per tray

Height: 0.080m per tray

  • EF-3.4 – Bar Linkages
  • EF-BU – Base Unit
  • EF-WS – Workstation (optional)

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