Lab Inventory: Actuators

The following tables may help you identify commonly used parts we have available in the lab supply.

For a searchable index of all lab parts, please see Physical Computing Lab Inventory.

Hobby Servos

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Small hobby servo. Lab Part 1896.

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LKY62 medium hobby servo, metal output spline. Lab Part 1899.

Gearmotors

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Lab Part 1931, brushed DC gear motor, 6V, shaft is 4 mm diameter x 25mm length, no load 130rpm drawing 100mA, 1kg*cm load 100pm drawing 0.45A, stall at 3.6kg*cm drawing 1.8A. We have purchased slightly different variations of this motor. Some have a pair of M3 threaded mounting holes spaced 17 mm apart, some spaced 15 mm apart. The boss is 7 mm diameter.

Shaft Hubs

Metal hubs are the only practical way to mount a load on the small gearmotors with 4 mm shafts; wooden or plastic parts will quickly deform and lose connection. Please never use glue on motor shafts.

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Generic flange shaft coupler (no Lab Part number yet). Available with a 4 mm bore for the 25 mm gearmotors or a 5 mm bore for the NEMA 17 stepper motors. Mounting holes are nominally 3 mm on a 16 mm diameter circle.

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These Pololu parts are being phased out due to rising price, but some are still in the lab. Lab Part 6049, hub, for 4mm shaft, with M3 tapped holes, 2-pack. More details: Pololu 1997 Motor Hub Drawing. These fit the 25 mm gearmotors with 4 mm shafts.

The Pololu 1998 hub for 5 mm shafts is Lab Part 1881. These fit the NEMA17 stepper motors with 5 mm shafts. More details: Pololu 1998 Motor Hub Drawing

Stepper Motors

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Lab Part 1908, stepper motor, NEMA17, for 3D Printer, 76 oz-in, 1.5A/phase, 5mm shaft with flat, 750mm leads with 4-pin wire header.