Home
Anatomical Models
Biology
Chemistry
Physics
Mechanics
Electricity
Compass
Counters
DC Motors
Glassware
Gyroscope
Hygrometer
Light (Optics)
Lab Supplies
Labware
Magnets
Metals
Microscopes
Multi-meters
pH meters
pH Papers
Pulleys
Levers
Refractometers
Scales
Thermometers
Tools

 Double Parallel Pulleys

Double parallel pulley is made of 2 parallel plastic sheaves assembles on a steel frame with brass axles and rivets.

Each sheave can spin freely and independently and the steel spacer is integrated in the frame for extra strength and balance.

 

Two, double parallel plastic pulleys can be combined to form a double fixed/double moveable block and tackle pulley system.  These pulleys have sheaves with deep V-grooves with diameters of 50 mm.

Pulleys are often used as parts of compound machines. They function as helper machines, easing the lifting power. In fact, a pulley system can cut the force necessary to lift a very heavy object in two, four, etc., depending on the designed system. With these pulleys you can study and measure the force and distance trade off with compound machines. These pulleys are good for science experiments as well as functional tasks.

The picture shows a block and tackle design using twisted Nylon String (100% Nylon) along with a weight, both of which are not included.

Set of two double parallel plastic pulleys with steel frame have a part# or product code of PP55_S2. With this set you can reduce the lifting force to 1/4th. Educational pulley systems and individual plastic pulleys with metal frames are used in teaching about pulleys in physics and mechanics education. They are not recommended for industrial applications.

Pulley Lines or Pulley Strings

You will need high quality strings or ropes for your pulleys. This pulley requires a 2-mm string. Please see the available pulley lines and make sure you order the right size for your pulleys.

Distributors of scientific and educational products

Where to buy?

Most pictures are linked to the pricing and online store for fast and convenient ordering

Our products are available at the following online stores. For large orders please call in advance and verify the availability, wholesale discounts and shipping options. If you cannot find any product in the online store of your choice, please use the search option of the store or call (973)777-3113 for further assistance.

SchoolOrders.com
MiniScience
CanadaScientific
ScienceKitStore
ChemicalStore
ScienceProjectStore

  All orders will be shipped from our warehouses in United States (USA), Canada or United Kingdom. We ship worldwide to most countries including U.S., Canada, Australia, United Kingdom, New Zealand, Germany, France, Netherlands, and many other countries.

List of metals for science experiments
 

Pulleys
 

Metal Pulleys, Industrial

Table Clamp Pulleys
Plastic_Pulley
Single Pulleys
Double_Tandem_Plastic_Pulley
Double Tandem Pulleys

Hand made Pulleys
Triple_Tandem_Plastic_PUlley
Triple Tandem Pulleys
Double_Parallel_Pulley
Double Parallel Pulleys
Triple_Parallel_Pulley
Triple Parallel Pulleys
Quad_Parallel_Pulley
Quad Parallel Pulleys

Plastic Table Clamp Pulley
Pleastic Sheaves
Plastic Sheaves

Fixed Pulley
Surface Mount Pulley

Hand made pulleys
Plastic_Pulleys
Plastic Pulleys with Aluminum Frame
Metal_Pulleys
All_Metal_Pulleys
Pulley_Experiment
Pulley Experiments

Pulley Strings

3-Way Bench Pulley

Force Table

Pulley Demonstration Set

Metal Bench Pulley

 

 

Copyright 2005 MiniScience Inc.