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    Grasshopper Nut for Battery Terminals

    The Grasshopper nut, produced with the help of James Cole-Henry from FRC team 95, The Grasshoppers, is an innovative battery solution to increase the reliability of battery terminal connections.

    # Pièce: TTB-0071
    $15,40
    46 en stock

    Kit contents: 

    • x2 Grasshopper Nuts
    • x2 PEM Nuts, pressed into the sheet metal Grasshopper Nut
    • x2 Nordlock washers
    • 10-32 x 5/8" long hex head bolt

    The Grasshopper Nut allows for a few things:

    • The aluminum nut plate provides a second frictional/mechanical interlock between the battery terminals. This engagement is so good that the potting around the battery tab will crack before the joint is loosened. No more loose battery lugs!
    • We recommend installing the nuts using a torque wrench for maximum effectiveness - install to 70 in-lbs (5.83 ft-lbs).
    • The threads and bolt head/lock washer are mechanically coupled, so a single Nord lockwasher can lock the whole assembly together exactly as the washer was designed to do
    • The extra material, flange head bolt, and PEM nut create a broad, even, clamping load on the terminal, reducing the chances of cupping and deformation that will reduce the electrical efficacy of the terminal
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    Kit contents: 

    • x2 Grasshopper Nuts
    • x2 PEM Nuts, pressed into the sheet metal Grasshopper Nut
    • x2 Nordlock washers
    • 10-32 x 5/8" long hex head bolt

    The Grasshopper Nut allows for a few things:

    • The aluminum nut plate provides a second frictional/mechanical interlock between the battery terminals. This engagement is so good that the potting around the battery tab will crack before the joint is loosened. No more loose battery lugs!
    • We recommend installing the nuts using a torque wrench for maximum effectiveness - install to 70 in-lbs (5.83 ft-lbs).
    • The threads and bolt head/lock washer are mechanically coupled, so a single Nord lockwasher can lock the whole assembly together exactly as the washer was designed to do
    • The extra material, flange head bolt, and PEM nut create a broad, even, clamping load on the terminal, reducing the chances of cupping and deformation that will reduce the electrical efficacy of the terminal
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    6 Gauge Compression Lug Connector 1/4 Stud Hole BURNDY #: YAZV6CTC14FX

    #am-0805
    $5,50
    ( 141 En stock)

    This is a heavy-duty compression lug from BURNDY for 06 AWG wire. This compression log can be easily crimped with the Cable Lug Crimping Tool.

     

    Specifications

    • Gauge: 06 AWG
    • Hole Size For Stud: 0.25 in.
    • Material: Copper
    • Overall Length: 2.03 in.
    • Tongue Width: 0.48 in.
    • Weight: 0.01 lbs
    • Wire Strip Length: 1.18 in.

    QTY 1 - 36 Inch Long 1/2" Rounded Hex Shaft - 7075 Aluminum

    #TTB-0069
    $32,50
    ( 0 En stock)

    A staple in any robotics team's shop - the 1/2" rounded hex shaft. This shaft allows you to drive hubs, pulleys and other 1/2" hex broached items while also fitting into a 13.75mm ID bearing with ease. This shaft comes in lengths of 36 inches so you can cut them down to the size you need.

     

    Available in both 7075 (anodized black) or 6061 (not anodized) variants.

     

    Includes a hole sized for #10 taps.

    Compliant Star 1/2 Hex 35A Durometer

    #am-5123_green
    $16,25
    ( 38 En stock)

    Compliant Stars are the perfect thing for intake mechanisms. The soft material gives way to allow rigid objects to be manipulated easily. A line of multiple stars on a driven hex shaft creates a very effective roller that ignores variations in the objects being driven. The multiple-spoke design allows the star to act as a brush, creating more surface area to interact with and grab objects. This makes for high-performance intakes and internal conveyors. A shaft collar may be used to make absolutely sure the wheels stay clear of other mechanisms or maintain consistent spacing. Molded into the star are several guidelines. Cut the star at the lines (or elsewhere) to create more compact mechanisms. 

     

     

    Different durometer ratings give each Compliant Star unique characteristics. Green stars (35A durometer) are the softest and most compliant around objects, while orange (40A), maroon (45A), and blue (50A) wheels are increasingly firm. Black (60A) is quite firm, while the Gray (80A) is nearly rigid. The increased firmness also allows the latter wheels to carry a higher RPM rating

    MK ES17-12 12 V SLA Battery

    #AM-0844
    $160,00
    ( 23 En stock)

    The MK ES17-12, 12 Volt, 18 amp-hour sealed lead acid battery with nut and bolt connector has proven to be a trustworthy power source for many FIRST Robotics Competition robots. 

     

    The batteries will be packed within a 7"x7"x7" box (aka: interior box). A 3/4" layer of closed-cell foam will be packed around the interior box, within a 9"x9"x9" box. The entire weight of this double box packing assembly will be approximately 29 pounds.

     

    Two (2) batteries are shipped within one box for this price.

    2.25 inch Compliant Wheel, 1/2 inch Hex, 35A Durometer, Green

    #am-3949_green
    $10,00 $10,42
    ( 66 En stock)

    These 2.25" diameter HD (heavy-duty) solid-core Compliant Wheels are intended for manipulating objects where you need a little 'give' in your intake system. These wheels deform out of the way to allow rigid objects to be manipulated easily. This makes for high-performance intakes and internal conveyors. These wheels do not require the use of expensive hubs to be driven, thanks to their integrated high strength polycarbonate hubs - which are made from the same mold that creates our Hex Molded Spacers.

    Sushi Roller Intake Wheels - 1/2 in. Hex, 40a (Orange)

    #am-4541_orange
    $6,00
    ( 4 En stock)

    The Sushi Roller Intake Wheels are an excellent choice for robot intakes, internal conveyors, feeder mechanisms, or anywhere you need a durable, compact and grippy roller. These rollers are made with a robust polycarbonate hex bore hub, so no external hub is necessary - just slide them onto a hex shaft, constrain them axially and you are good to go. Available in a range of durometers for a wide variety of applications, these cute little rollers are great for getting a grip on things!

     

    Specifications

    • Bore: 0.5 in. Hex, 5 mm Hex, 0.375 in. Hex
    • Core Material: Polycarbonate
    • Diameter: 1 in.
    • Durometer: 35A (Green), 40A (Orange), 50A (Blue), 60A (Black)
    • Tread Material: TPU
    • Weight: 0.022 lbs
    • Width: 1 in.

    2" Stealth Wheel, 1/2 Hex Bore, Orange, 40 Durometer (am-3155_orange)

    #am-3155_orange
    $9,00
    ( 46 En stock)

    The inside black portion of this wheel is made from molded polycarbonate plastic. The outer tread is TPU (Thermoplastic PolyUrethane). This robust but lightweight wheel provides good traction on carpet and soft tiles. Stealth wheels are the perfect drive wheel for smaller (<50 lb.) robots, or for intakes and other auxiliary robot mechanisms. These wheels are available in a variety of bores and durometers. 4 in. Stealth Wheels feature a 6 bolt pattern on a 1.875 in. bolt circle for mounting sprockets, hubs, and gears. Nub Bore Stealth Wheels feature a 4 bolt pattern on a 16 mm bolt circle found in most FIRST Tech Challenge building systems. The lower the durometer the softer the wheel is, this makes it wear away faster, but also makes it more grippy.

    Product Usage:
    Many thread locking materials are not compatible with polycarbonate and can eat away at the plastic. Be sure to check which adhesives are okay to use with this product.

    Specifications

    • Bore: 1/2 in. Hex, 3/8 in. Hex, Nub Bore, 5 mm Hex
    • Diameter: 2 in., 4 in.
    • Durometer: 35A (Green), ⠀40A (Orange), ⠀50A (Blue), ⠀60A (Black), ⠀80A (Gray)
    • Hole Pattern: Qty 4 3.5 mm Holes on a 16 mm Circle for 8 mm bore wheels
    • Material: TPU, Polycarbonate
    • Weight: 0.23lb, 0.1lb
    • Width: 1 in.

    Documents

    Layout Print(s)

    am-3664 2in 5mm Hex Stealth Wheel REV4.PDF

    am-3156 2IN 8mm Stealth Wheel REV3.PDF

    am-3436 2in 375Hex Stealth Wheel REV3.PDF

    am-3155 2in 500Hex Stealth Wheel REV3.PDF

    am-3665 4in 5mm Hex Stealth Wheel REV3.PDF

    am-2648 4IN 8mm Stealth Wheel REV5.PDF

    am-3435 4in 375Hex Stealth Wheel REV3.PDF

    am-2647 4in 500Hex Stealth Wheel REV3.PDF

    CAD File(s)

    am-3664 2in 5mm Hex Bore Stealth Wheel REV3.STEP

    am-3156 2IN 8mm Stealth Wheel.STEP

    am-3436 2IN 375Hex Stealth Wheel REV2.STEP

    am-3155 2IN 500Hex Stealth Wheel REV2.STEP

    am-3665 4IN 5mm Hex Stealth Wheel REV2.STEP

    am-2647 4inWheel 500 Hex REV2.STEP

    am-3435 4in Wheel Integrated Hub 375 HEX with Tread REV2.STEP

    am-2648 4inWheel 8mm Hub REV2.STEP

    REEFSCAPE Game Pieces - Coral - PVC Pipe - Game Piece 1

    #am-5601
    $6,75
    ( 48 En stock)

    Coral (also known as Game Piece 1) is a 11 ⅞ in. long (~30 cm) piece of 4 in. diameter Schedule 40 Cellular (Foam) Core PVC pipe. Coral has a 4-in. (~102 mm) inside diameter and a 4½-in. (~11 cm) outside diameter. The Coral sold here is from the same batch and manufacturer used on official fields.