Description:

The Silver Spark line of motors has the same 16mm diameter as the Gold Sparks, but the gears are a larger pitch. This means less worrying about stripping teeth in your bigger or heavier applications!

Extra-long 3mm shaft for mounting wheels directly with the option to use a bearing block for support on the wheel's far side.

Same 11mm face mount pattern as Gold Spark motors.

All-metal spur gearhead mated to a Mabuchi FK-050 motor.

8 different gear ratios for a wide range of rpm and torque to choose from.  One twice as fast, and one twice as slow as the Gold Sparks!

Weights from 28 - 32grams (0.99 - 1.13oz). (see details)

Motor (Mabuchi FK-050SH-13125) Specifications

Operating Voltage: 3V - 18.5V (>10V decreases motor life)

Nominal Voltage: 6V, but most commonly run at 11.1V.

(14.8V runs fine but support the shaft because the gears are taking more abuse.)

No Load RPM: 11530rpm

No Load Current: 0.09A

Stall Current: 1.3A

Stall Torque: 0.0461kg-cm (0.64oz-in)

Kt: 0.0352kg-cm/A (0.49oz-in/A)

Kv: 1573rpm/V

Peak Efficiency: 52%

RPM @ Peak Eff: 9100

Current @ Peak Eff: 0.34A

Physical Specifications

Gearbox Lengths:

ratios 11: 11.5mm (0.45in)

ratios 22, 33, 50: 12.7mm (0.50in)

ratios 83, 100: 14.3mm (0.56in)

ratios 200, 300: 16.4mm (0.65in)

ratios 600: 17.9mm (0.70in)

Motor Length: 28.7mm (1.13in)

Motor weight (no gearbox): 17g (0.60oz)

Gearbox Diameter: 16mm (0.63in)

Shaft Diameter: 3mm (0.12in) with flat along length

Shaft Length: 38mm (1.5in)

Mounting Holes (2): #2-56 spaced 11mm (0.433in) apart

-do not use screws that protrude more than 2mm (0.078in) into gearbox

Weight:

ratios 11: 28g (0.99oz)

ratios 22, 33, 50, 83, 100: 29g (1.02oz)

ratios 200, 300: 31g (1.09oz)

ratios 600: 32g (1.13oz)

No Load Speed @ Gear Ratio/Voltage

Maximum Torque @ Ratio/Voltage (kg-cm) (oz-in)

Kit include:

1 x FingerTech "Silver Spark" 16mm Gearmotor