

Pendulum Bobs, Assorted Size Laboratory Set
From $2.70 (Ex GST)
- Pendulum bobs for mechanics experiments, available as brass, steel and plastic options plus a brass set of three
- Diameter options include 25 mm brass, 20 mm brass, 12.5 mm brass, 20 mm steel and 20 mm plastic as listed
- Brass set includes 25 mm, 20 mm and 12.5 mm bobs for comparing mass and damping effects
- Each bob has through hole plus counterbored hole, knot hidden inside for tamper-proof string attachment
- Designed for repeatable pendulum length setups, supports timing and oscillation investigations in classroom use
- Description
Description
Pendulum bobs supplied as brass and steel options, including a brass set of three different diameters and individual bobs in listed diameters. Each bob has a small hole drilled through and a larger counterbored hole on one side so a knot can be made in a string and pulled up into the larger hole to be hidden and tamper-proof.
Brass Pendulum Bob Set of 3, 25 mm 20 mm 12.5 mm Diameter
Pendulum bobs set of three supplied as 1 x 25 mm brass bob, 1 x 20 mm brass bob, and 1 x 12.5 mm brass bob. Each bob has a small hole drilled through and a larger hole counterbored on one side so a knot can be made in a string and the knot pulled up into the larger hole to be hidden and tamper-proof.
Brass Pendulum Bob 25 mm Diameter
Brass pendulum bob, 25 mm diameter. Each bob has a small hole drilled through and a larger hole counterbored on one side so a knot can be made in a string and the knot pulled up into the larger hole to be hidden and tamper-proof.
Brass Pendulum Bob 20 mm Diameter
Brass pendulum bob, 20 mm diameter. Each bob has a small hole drilled through and a larger hole counterbored on one side so a knot can be made in a string and the knot pulled up into the larger hole to be hidden and tamper-proof.
Brass Pendulum Bob 12.5 mm Diameter
Brass pendulum bob, 12.5 mm diameter. Each bob has a small hole drilled through and a larger hole counterbored on one side so a knot can be made in a string and the knot pulled up into the larger hole to be hidden and tamper-proof.
Steel Pendulum Bob 20 mm Diameter
Steel pendulum bob, 20 mm diameter. Each bob has a small hole drilled through and a larger hole counterbored on one side so a knot can be made in a string and the knot pulled up into the larger hole to be hidden and tamper-proof.
Plastic Pendulum Bob 20 mm Diameter
Plastic pendulum bob, 20 mm diameter. Each bob has a small hole drilled through and a larger hole counterbored on one side so a knot can be made in a string and the knot pulled up into the larger hole to be hidden and tamper-proof.
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Emma Roberts
6 months ago
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
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7 months ago
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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9 months ago
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10 months ago
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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11 months ago
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
