Cast Iron Bar Breaker
From $181.00 (Ex GST)
- Classic cast iron bar breaker demonstrates expansion and contraction using a heated steel bar in frame
- Cast base with gas burner heats bar until expansion breaks cast iron pin with loud report
- Fit pin while bar is hot, cooling contraction again breaks pin, showing force of temperature change
- Steel bar locked by cast iron pin, expansion bends cast iron rod until pin fails
- Fuel versions here: LP gas or natural gas, with separate coal model also noted
- Description
Description
Classic cast iron bar breaker apparatus demonstrating the forces of thermal expansion and contraction. A steel bar sits in a cast iron frame and is locked by a cast iron pin. A gas burner fitted into the cast base heats the bar until expansion breaks the pin with a loud report, then a new pin can be fitted while hot and broken again as the bar cools and contracts. Models are available for coal, natural gas, or LP gas.
Cast Iron Bar Breaker, LP Gas Burner Base, Expansion and Contraction Pin Break Demo
Classic cast iron bar breaker demonstrating expansion and contraction. A steel bar lies in a cast iron frame and a cast iron pin locks the bar in place. A gas burner is fitted into the cast base and heats the bar. As the bar expands, it tries to bend the cast iron rod until the cast iron pin breaks with a loud report. With the steel bar hot, another pin can be fitted and locked. As the bar cools and contracts, again the cast iron bar is broken with a loud report. This model is configured for LP gas operation.
Cast Iron Bar Breaker, Natural Gas Burner Base, Expansion and Contraction Pin Break Demo
Classic cast iron bar breaker demonstrating expansion and contraction. A steel bar lies in a cast iron frame and a cast iron pin locks the bar in place. A gas burner is fitted into the cast base and heats the bar. As the bar expands, it tries to bend the cast iron rod until the cast iron pin breaks with a loud report. With the steel bar hot, another pin can be fitted and locked. As the bar cools and contracts, again the cast iron bar is broken with a loud report. This model is configured for natural gas operation.
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Our Reviews
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We ordered a set of customised BORO 3.3 borosilicate glassware for our teaching labs, and LabChoice Australia exceeded every expectation. From the first consultation to final delivery, their team listened carefully, offered expert advice, and ensured every piece matched our specifications perfectly.
The clarity and precision of the glassware are exceptional, and the quick turnaround made setup effortless. It’s refreshing to work with an Australian supplier who genuinely understands laboratory needs and takes pride in quality craftsmanship. We’ll definitely be returning to LabChoice for future glassware requirements
⭐⭐⭐⭐⭐
Our lab required high-precision BORO 3.3 glassware for analytical testing, and LabChoice Australia delivered outstanding results. The ordering process was simple, communication was clear, and every beaker and flask arrived perfectly calibrated and ready for use.
The quality of the glass is exceptional — resistant to heat, easy to clean, and consistently accurate in measurement. It’s reassuring to know there’s an Australian supplier that combines scientific precision with genuine customer care. I’d recommend LabChoice to any research team looking for dependable labware
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We needed a set of customised borosilicate glassware for a specialised project, and LabChoice Australia delivered exactly what we envisioned. The team worked closely with us from design to production, ensuring every detail met our specifications. The craftsmanship is exceptional, and the turnaround time was impressive. It’s reassuring to know we can rely on them for unique, made-to-order pieces
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LabChoice Australia has completely changed the way we source our lab glassware. The quality is consistently top-notch, and every piece meets the precision we need for reliable results. Their team knows their stuff, answers our questions quickly, and always goes the extra mile to help — they’re more like partners than just a supplier.
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We trust LabChoice Australia because they deliver every time. Their borosilicate glassware is durable, accurate, and perfect for the high-heat work we do. Everything arrives well-packed with clear specs, so there are never surprises. It’s reassuring to deal with a supplier who understands both compliance and the demands of a busy lab