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Mechanics—Simple Machines, continued
Pulley Clamp, Adjustable
Low-friction ball bearing pulley. Pulley adjusts up to 10 cm in height and clamps to
a table up to 5 cm thick.
Catalog No. Description Price/Each
AP9218 Pulley Clamp, Adjustable $47.00
Pulley with Clamp
A handy pulley that clamps where needed. Fits any surface up to 19 mm thick. Attach
it to tables, benches, and inclined planes.
Catalog No. Description Price/Each
AP5700 Pulley with Clamp $15.80
Pulley with Clamp
AP5700
Pulley, with Rod, Economy Choice
This affordable pulley with rod is an excellent choice for those simple pulley demonstrations
that do not require high precision. Sturdy construction will last for years.
Clamps to a support stand with Clamp Holder (AP8219). Pulley diameter is 11/2"; rod
diameter is 1/4"; overall length is 6".
Catalog No. Description Price/Each
AP6943 Pulley, with Rod, Economy Choice $ 7.58
AP8219 Clamp Holder 19.50
Pulley with Rod,
Economy Choice
AP6943
Pulley Clamp,
Adjustable
AP9218
Pulley Demonstration Kit, Economy Choice
Highly visible red pulleys can be seen from the back of the room for demonstrations.
Or purchase multiple sets for students to use at lab stations—the price is affordable
and this equipment will last. Durable set includes all materials necessary to set up
a variety of experiments: metal pulleys, slotted weights, weight hangers, wheel and
axle, string, and a sturdy wooden base and metal frame. Includes instructions and
sample experiments. 32" H x 32" W x 8½" deep.
Catalog No. Description Price/Each
AP7812 Pulley Demonstration Kit, Economy Choice $239.00
Pulley Demonstration Kit
This comprehensive kit contains everything you need to demonstrate all the major
principles associated with pulleys. Every major type of pulley arrangement is included
as well as a wheel and axle. Weight hangers, weights, hook collars and pulley cord
are also provided. This kit is suited for large classroom demonstrations. The kit also
contains complete operating instructions describing the set’s assembly and experiments
on mechanical advantage, efficiency and the effects of friction.
Catalog No. Description Price/Each
AP5698 Pulley Demonstration Kit $690.00
Pulley Demonstration
Kit, Economy Choice
AP7812
Pulley Demonstration Kit
AP5698
Wheel and Axle
Demonstrate the mechanical advantage of the lever system capable of continuous
rotation—the wheel and axle. The multiple pulley steps make the differences in
mechanical advantage clear for students. The drilled holes in the rims of the pulley
steps on the standard wheel and axle make attachment of pulley cords easy. Its ball
bearing and stainless steel axle assure low friction and better results.
Catalog No. Description Price/Each
AP6031 Wheel and Axle, Standard $29.75
MECHANICS—SIMPLE MACHINES continued on next page.
Wheel and Axle
AP6031
Analyze Gears Output
Input
18 teeth
Idler
6 teeth 24 teeth
The mechanical advantage (MA) of a gear system is determined by the ratio between
the number of teeth (radius) on the output gear compared to the input gear. For a gear
system with more than two gears, the mechanical advantage of the system is determined
by multiplying the mechanical advantage of each two-gear combination. The center gear
is known as the idler gear.
MA of input and idler = ——6— = ——1—
18 3
MA of idler and output = —2—4— = ——4—
6 1
MA of combination = ——1 — x ——4— = ——4—
3 1 3
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