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FTC Guided Experience: SPROCKETS & GEARS

Depending on what your team's robot is designed to accomplish, multiple parts may be required. Unsure of where to begin? Let's take a look at the parts used to transfer, restrict, or constrain MOTION on the robot. The REV FTC Starter Kit, which provides over 1400 parts, is a great way to start building the mechanisms of an FTC robot that is ready to drive.

The REV 15mm Building System is an affordable robotics build platform that is most commonly used within the FIRST Tech Challenge and in the classroom for educational purposes. The core to transmitting motion within the system is the 5mm hex (hexagonal, six-sided) shape. This hex shape is incorporated into the other main motion components, such as: sprockets, gears, wheels, and shafts. The two primary systems used to transmit motion are sprockets and gears.

SPROCKETS & CHAIN

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  • Better for transmitting motion over long distances
  • Changing sprocket sizes requires changing chain length

  • Chain is more forgiving in construction accuracy

  • Chain tension and wrap are important

 

GEARS

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  • Can be used for changing rotation direction
  • More compact

  • More flexibility in adjusting speed and torque

  • Gear spacing is important

 

 

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  • 5mm Metal Hex Bore Gears

    5mm Metal Hex Bore Gears

    $9.00 - $10.00
    5mm Metal Hex Bore Gears are compatible with the REV DUO System and work with REV 5mm hex shafts in high-load applications. REV metal gears are NOT compatible with REV plastic gears. All REV metal gears are narrower than plastic...
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    $9.00 - $10.00
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  • 5mm Plastic Hex Bore Gears

    5mm Plastic Hex Bore Gears

    $4.50 - $8.00
    5mm Plastic Hex Bore Gears are compatible with the REV DUO System and fit on a 5mm hex shaft. The hex shaft interface completely eliminates the need for expensive hubs or using potentially unreliable set screws. Gears 45 tooth...
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    $4.50 - $8.00
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  • UltraPlanetary Brackets

    UltraPlanetary Brackets

    $7.00
    UltraPlanetary Brackets are compatible with the REV DUO System. Each bracket includes holes on an 8mm grid that is compatible with many other building systems. The UltraPlanetary Outside Mounting Bracket (REV-41-1621) is used to...
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  • DUO Plastic #25 Sprockets

    DUO Plastic #25 Sprockets

    $4.50 - $8.00
    DUO Plastic #25 Sprockets are compatible with the REV DUO System and fit on a 5mm hex shaft. The hex shaft interface completely eliminates the need for expensive hubs or using potentially unreliable set screws. Sprockets 15 tooth and...
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  • #25 Chain & Metal Sprocket Bundle

    #25 Chain & Metal Sprocket Bundle

    REV-45-1889
    $339.00
    The #25 Chain and Metal Sprocket Bundle can be used to change the speed, torque or direction of a motor. The DUO Build System is designed around #25 Roller Chain (REV-41-1365) using compatible #25 Sprockets. The bundle also includes the...
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  • 86 Tooth Metal Gear

    86 Tooth Metal Gear

    REV-41-1661
    $13.50
    Metal gears designed to work with REV 5mm hex shafts in high-load applications. REV metal gears are NOT compatible with REV plastic gears. All REV metal gears are narrower than plastic gears, allowing for compact drivetrains and gearboxes within the same...
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    $13.50
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  • 70 Tooth Metal Gear

    70 Tooth Metal Gear

    REV-41-1662
    $12.50
    Metal gears designed to work with REV 5mm hex shafts in high-load applications. REV metal gears are NOT compatible with REV plastic gears. All REV metal gears are narrower than plastic gears, allowing for compact drivetrains and gearboxes within the...
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  • 56 Tooth Metal Gear

    56 Tooth Metal Gear

    REV-41-1663
    $11.50
    Metal gears designed to work with REV 5mm hex shafts in high-load applications. REV metal gears are NOT compatible with REV plastic gears. All REV metal gears are narrower than plastic gears, allowing for compact drivetrains and gearboxes within the...
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  • 42 Tooth Metal Gear

    42 Tooth Metal Gear

    REV-41-1664
    $10.00
    Metal gears designed to work with REV 5mm hex shafts in high-load applications. REV metal gears are NOT compatible with REV plastic gears. All REV metal gears are narrower than plastic gears, allowing for compact drivetrains and gearboxes within the...
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    $10.00
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  • #25 Chain Tool

    #25 Chain Tool

    REV-42-1442
    $34.50
    A custom-designed tool that allows teams to easily break and re-assemble #25 chain. The mandrel is used to push out the chain pin. If using master links, the pin can be completely removed, but the depth guide screw allows the option of partially pressing...
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  • #25 Roller Chain - 10 ft

    #25 Roller Chain - 10 ft

    REV-41-1365
    $17.50
    Single Strand #25 roller chain for use with #25 sprockets. Use a master link (connecting link) for #25 chain connect two ends of chain to create a loop. Specifications Material: Steel Size: #25 Pitch: 0.25in
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  • 40 Tooth Metal #25 Sprocket

    40 Tooth Metal #25 Sprocket

    REV-41-1723
    $11.50
    Metal sprockets designed to work in high-load applications with #25 chain. This sprocket requires a hub like REV-41-1719. Specifications Chain Size: #25 Material: 6061 Aluminum Documentation SprocketGuide BuildingGuide CAD & Drawings SKU-STP...
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    $11.50
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  • 32 Tooth Metal #25 Sprocket

    32 Tooth Metal #25 Sprocket

    REV-41-1722
    $9.00
    Metal sprockets designed to work in high-load applications with #25 chain. This sprocket requires a hub like REV-41-1719. Specifications Chain Size: #25 Material: 6061 Aluminum Documentation SprocketGuide BuildingGuide CAD & Drawings SKU-STP...
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    $9.00
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  • 26 Tooth Metal #25 Sprocket

    26 Tooth Metal #25 Sprocket

    REV-41-1721
    $7.50
    Metal sprockets designed to work in high-load applications with #25 chain. This sprocket requires a hub like REV-41-1719. Specifications Chain Size: #25 Material: 6061 Aluminum Documentation SprocketGuide BuildingGuide CAD & Drawings SKU-STP...
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    $7.50
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  • 20 Tooth Metal #25 Sprocket

    20 Tooth Metal #25 Sprocket

    REV-41-1720
    $5.50
    Metal sprockets designed to work in high-load applications with #25 chain. This sprocket requires a hub like REV-41-1719. Specifications Chain Size: #25 Material: 6061 Aluminum Documentation SprocketGuide BuildingGuide CAD & Drawings SKU-STP...
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    $5.50
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  • 15 Tooth Metal #25 Sprocket

    15 Tooth Metal #25 Sprocket

    REV-41-1717
    $4.50
    Metal sprockets designed to work in high-load applications with #25 chain. This sprocket requires a hub like REV-41-1719. Specifications Chain Size: #25 Material: 6061 Aluminum Documentation SprocketGuide BuildingGuide CAD & Drawings SKU-STP...
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    $4.50
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  • 10 Tooth Metal #25 Sprocket - 4 Pack

    10 Tooth Metal #25 Sprocket - 4 Pack

    REV-41-1716-PK4
    $11.50
    Metal sprockets designed to work in high-load applications with #25 chain. Specifications Chain Size: #25 Material: Sintered Steel CAD & Drawings REV-41-1716 STEP File REV-41-1716 Drawing
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    $11.50
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