These brand-spanking new 12VDC motors are made to move automobile seats but are willing to change. They spin at approx 190 rpm, draw 1.5A no load, and stall at approx 25A. Threaded shaft is at a right angle and is 4-1/8" x 7/16". Shaft thread is non-standard, so treat it as a smooth shaft and mount pulley or gear with a setscrew. Measures 5-5/8" x 2-1/2" x 2-1/2" overall, not counting the shaft, and has power terminals opposite the gearbox with (2) 1/4" mounting holes opposite the shaft.
Attention robotics boffins: Here's a nice, powerful 12-24VDC Mabuchi brush motor with a gearbox and pulley attached. At its nominal 24DC, it spins 45rpm, draws 280mA no load, and stalls a 750mA. 7.5 in-lbs of torque and is rated for continuous duty. Has a 3/4" long x 5/16" flattened shaft with a 4-5/8" dia x 5/16" wide (3/16" ID) single-sheave pulley attached, with a matching O-ring. The gearbox measures 2-3/4" x 3" x 9-1/16". The motor measures 1-1/16"dia x 1-5/8" long and comes with 7" leads and a 2-pin Molex connector.
This torquey take-out 6-24VDC (12VDC nominal) motor draws approx 250mA no load, stalls at 7.2A and spins approx 5700 rpm. Measures 2" x 1-13/32" with a 3/4" x 1/8" flattened shaft and may have a setscrew-mounted coupler that resembles a router bit. Has prewired leads. Mabuchi part no. RS-545SH.
Our motorman, CJ, called this reversible 12-24VDC motor strange, mostly because it has the power contacts mounted on the face, bracketing the 11/16" x 1/8" mostly striated shaft, and has no mounting brackets. But that shouldn't stop a clever person like you. (Hint: it was probably made to fit into a sleeve of some sort.) At 12VDC, draws 100mA no load, stalls 850mA and spins approx 900 rpm; at 24VDC, draws 150mA, stalls 2.2A and spins approx 1800 rpm. Measures 2-1/4" x 1-13/32" dia.
Our motor dude calls this DC reversible gear motor "very interesting." Rated for 3-24VDC with speed ranging from 75 to 654 rpm. The current draw is very low, 2.4mA no load and the highest readable stall current is 90mA. The motor itself is 1-11/16" long x 11/16" dia with a 7/16" long x 3/32" dia shaft with a 9mm (approx 3/8") single sheave, 2mm ID pulley on it. Motor is connected to a monodirectional drive assembly with some mystery circuitry glued to it. Feel free to discard this. Motor is German, gearhead and drive train are Swiss.
This reversible gear motor from Von Wiese has a range of 12 to 24VDC 680mA no load. Stalls at 14A and spins approx 30 rpm at the gearbox shaft. Motor is 2" dia with an 11/16" x 1/4" dia back shaft between the power terminals. The gear box measures 4-5/8" x 3" and together the motor and box are 5-1/8" thick. Output shaft is 1/2" long x 7/16" x 1/4" and it generates 47 in/lbs of torque. Plus it's made in the USA.
This 12VDC reversible unbranded motor spins approx 7000 rpm, draws 2.2A no load, and stalls at something over 10A, which is where our house ammeter quits. Motor is open near the coils, so you can watch it spark! Measures 2" long x 1-7/16" with a 5/16" long x 1/8" dia shaft, 1/8" power terminals and 3/32" mounting holes on the shaft side.
Great little 6-12VDC reversible motor draws 1.6A, spins approx 6000 rpm no load and stalls at over 10A. Measures 2-1/4" long x 1-7/16" dia with a 5/16" long x 1/8" dia shaft, 5/32" power terminals and 3/32" mounting holes on the shaft side.
This beefy little gear motor from Ametek® is nominally rated for 24VDC, draws 160mA no load and stalls at 5.7A. Measures 3-7/8" long x 2" dia at the gearbox and has a 9" long actuator shaft with a 3/8" - 8 thread. Spins approx 1325 rpm. Also operates on 12VDC for 130mA/2.25A/450rpm. Plenty of torque: motor is rated for 5.165 oz/in, not counting the gearbox. Has 17" leads.
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