Gears
  • KELVIN® Super Economy Gear Set

    KELVIN® Super Economy Gear Set

    A set of four different-sized gears (ranging from 12-, 20-, 30-, and 40-teeth) with holes to attach to each other with screws. Small gear fits toy motor shafts. New durable plastic material. Black, Set of 4. Will work with these gears: 390622, 390626,...

    $0.95
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  • KELVIN® Super Economy Gear Set, Green

    KELVIN® Super Economy Gear Set, Green

    A set of [4] different-sized gears (ranging from 12-, 20-, 30-, and 40-teeth) with holes to attach to each other with screws. The large gear measures 1-5/8 in. dia. The small gear fits 2mm motor shafts. Other gears fit 3mm shaft. Durable plastic. Green...

    $1.45
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  • 15 mm dia. Gear Pack

    15 mm dia. Gear Pack

    Fits 1/8 in. or 3mm diameter axle. 15mm, 13-tooth. 10/pkg. Will work with these gears: 390622, 390626, 390585, 390634, 390635, 390636, 750112, 990174, and 990179.

    $3.95
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  • 20 mm dia. Gear Pack

    20 mm dia. Gear Pack

    20 mm dia., 18-tooth pulley fits 1/8 in. or 3mm diameter axle. 10/pkg. Will work with these gears: 390622, 390626, 390585, 390633, 390635, 390636, 750112, 990174, and 990179.

    $3.95
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  • 40 mm dia. Gear Pack

    40 mm dia. Gear Pack

    40 mm dia., 38-tooth pulley fits its 1/8 in. or 3mm diameter axle. 10/pkg. Will work with these gears: 390622, 390626, 390585, 390633, 390634, 390636, 750112, 990174, and 990179.

    $4.45
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  • 60 mm dia. Gear Pack

    60 mm dia. Gear Pack

    60 mm dia., 58-tooth pulley fits 1/8 in. or 3mm diameter axle. 10/pkg. Will work with these gears: 390622, 390626, 390585, 390633, 390634, 390635, 750112, 990174, and 990179.

    $5.95
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  • Advanced Gear Set

    Advanced Gear Set

    Use the Gears to Count Movement with Sensors! Evenly spaced holes near the edge, which can be used with a slotted optocoupler to measure velocity, acceleration or distance of the gear or vehicle. Holes can also be used to attach the gear to a wheel,...

    $2.45
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  • Slotted Opticoupler

    Slotted Opticoupler

    For use with the Advanced Gear Set (391128). Can be used with your circuit to measure the gear rotation speed. 5V DC.

    $3.95
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  • Deluxe Gear Set

    Deluxe Gear Set

    Deluxe assortment of gears for power transmission. Small gear and worm gears fit a toy motor. The Deluxe Gear Set Includes: [4] 10-Tooth Gears [4] 20-Tooth Gears [4] 30-Tooth Gears [4] 40-Tooth Gears [4] 50-Tooth Gears [2] 1/4 in. dia. Rack and Pinion...

    $46.95
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  • Gear & Pulley Combo

    Gear & Pulley Combo

    SPECIAL OVERSTOCK SALE! NOW $1.95 12-tooth gear with built-in pulley. Push-fits toy motor shafts and most gears. 20/pkg. Will work with these gears: 390622, 390626, 390633, 390634, 390635, 390636, 750112, 990174, and 990179. Shown with motor (not...

    Was: $3.95
    Now: $1.95
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  • Beveled Gears

    Beveled Gears

    20mm diameter gears with beveled edges. Fits 1/8 in. or 3mm diameter shaft. 10/pkg. Will work with these gears: 390626, 390585, 390633, 390634, 390635, 390636, 750112, 990174, and 990179.

    $9.95
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  • KELVIN® Worm Gear

    KELVIN® Worm Gear

    This versatile worm gear can be used for a variety of projects. It features two hole sizes. One side fits a 2mm motor shaft. The other side fits a 1/8 in. axle. Black. 10/pkg.Does not include motor and gear assembly shown.Works with 841219.

    $9.95
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  • Worm Gear

    Worm Gear

    Use with racks. 1-1/4 in. long. Fits 2mm Shaft. 10/pkg.

    $9.95
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  • Gear Racks

    Gear Racks

    50mm Long. 10/pkg. Will work with these gears: 390622, 390585, 390633, 390634, 390635, 390636, 750112, 990174, and 990179.

    $8.25
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  • 1/8 in. dia. Gear Adapter/Reducer

    1/8 in. dia. Gear Adapter/Reducer

    Place in gear hole so gear will fit toy motor shaft. 1/8 in. (3mm) to Motor Shaft (2mm). 10/pkg. Will work with these gears: 390623, 390627, and 390629.

    $2.45
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  • Cams Set

    Cams Set

    A set of four cams: one eccentric, one regular and two sizes of pear cams.

    $3.95
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