TT Motor All-Metal Gearbox - 1:90 Gear
Ratio
PRODUCT ID: 3802
These durable (but affordable!) gearbox motors (also known as 'TT' motors) are
an easy, low-cost way to get your projects moving. This is a TT DC All-Metal
Gearbox Motor with a gear ratio of 1:90 about double of the 'standard' 1:48
ratio. That gives them higher torque but slower rotational speed. Since they're
slower they're good for robots where strength is more important than speed.
They look a lot like our yellow all-plastic-gearbox motors but these have all of
the motor gears machined from steel, so they won't strip as easily, and they're
gears also mean they're louder when running.
You can power these motors with 3VDC up to 6VDC, they'll of course go a little
running it from a bench-top supply
twice as slow (and twice as powerful) given their lower gearbox ratio. The metal
faster at the higher voltages. We grabbed one motor and found these stats when
At 3VDC we measured 80mA @ 60 RPM no-load, and 0.5 Amps when
stalled
At 4.5VDC we measured 90mA @ 90 RPM no-load, and 0.8 Amps when
stalled
stalled
At 6VDC we measured 100mA @ 120 RPM no-load, and 1.0 Amps when
Note that these are very basic motors, and have no built-in encoders, speed
control or positional feedback. Voltage goes in, rotation goes out! There will be
variation from motor to motor, so a separate feedback system is required if you
need precision movement.
Comes 1 x per order, with just the motor. These motors
do not
come with wires
attached, so you'll need to solder wires on yourself.
You
cannot
drive these directly from a microcontroller, a high-current motor
as it works well down to 3V and can be set up with current limiting since the
stall current on these can get high. The TB6612 can also be used, it's on our
likely want to run these motors at anyhow!
We have a range of wheels, add-ons and accessories for these motors so you
can bling out your bot just the way you like.
driver is required! We recommend our DRV8833 motor driver for these motors,
shields and wings, but you'll need to supply at least 4.5V - which is what you'll
Dimensions (excluding shaft): 69.5 x 22 x 20.7mm
Product Weight: 39.4g / 1.4oz
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