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Nema 8 Stepper Motor Bipolar w/ 64:1 Planetary Gearbox

Nema 8 Stepper Motor Bipolar w/ 64:1 Planetary Gearbox

Best price now

$90.26at RobotShop USAChecked Nov 10

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Price facts

  • Last seen at $90.26 at RobotShop USA on Nov 10.

Our take on the Nema 8 Stepper Motor Bipolar w/ 64:1 Planetary Gearbox

This is a Nema 8 bipolar stepper motor with a 38 mm body and a 64:1 planetary gearbox built onto the front. The gearbox trades speed for torque, giving a stall torque of 127.5 oz.in from a motor that draws only 0.6 A at 6 V nominal. It suits small robots, lab instruments and positioning stages where space is tight but the load needs slow, strong, precise motion. Against a bare Nema 8, it delivers far more torque at low speed but cannot spin fast; against a larger Nema 11 or 17 with gearing, it saves space at the cost of absolute torque.

Best forSmall robots and mechanisms with tight spaceLow-speed, high-torque positioningLab and desktop automation buildsProjects running from a 6 V supply
Pros
  • 64:1 planetary gearbox gives strong low-speed torque
  • Compact 38 mm body fits crowded frames
  • Low 0.6 A stall current suits small drivers
  • 6 mm shaft is a common, easy-to-couple size
  • Bipolar wiring gives good torque per amp
Cons
  • Gearbox limits top speed sharply
  • Backlash in the planetary stage can hurt fine positioning
  • Only 127.5 oz.in of stall torque, modest for heavier loads
  • 6 V nominal means low voltage headroom

Nema 8 Stepper Motor Bipolar w/ 64:1 Planetary Gearbox prices at every store

  • RobotShop USANew

    In stockReturn policy

    $90.26Checked Nov 10
    Visit RobotShop USA

About the Nema 8 Stepper Motor Bipolar w/ 64:1 Planetary Gearbox

This is a bipolar Nema 8 stepper motor with an integrated 64:1 planetary gearbox. The motor body is 38 mm long and the rated current is 0.6 A.

The gearbox lowers the output speed and raises torque. This suits applications with limited space that need low speed, high torque, or both.

Motor type
Nema 8 bipolar stepper motor
Gear ratio
64:1 planetary gearbox
Nominal voltage
6 V
Stall current
0.6 A
Stall torque
127.5 oz.in
Shaft diameter
6 mm
Shaft type
D-cut
Dimensions
22 x 22 x 38 mm
In the box
1 x Nema 8 Stepper Motor Bipolar w/ 64:1 Planetary Gearbox

Questions and answers

What is this motor best used for?
Slow, precise motion in a small space: small robot joints, camera sliders, lab fixtures and positioning stages. The 64:1 gearing makes it strong at low speed rather than fast.
How much torque does it produce?
Stall torque is 127.5 oz.in at 0.6 A stall current. That is the holding and low-speed figure; usable torque drops as speed rises.
What voltage and current does it need?
Nominal voltage is 6 V and stall current is 0.6 A. A small bipolar stepper driver rated above 0.6 A per phase will run it.
What shaft does it have?
A 6 mm shaft, which matches common 6 mm couplers, pulleys and hubs.
Is it better than a bare Nema 8?
For torque at low speed, yes: the 64:1 gearbox multiplies torque many times over. For fast motion, no: a bare Nema 8 spins much faster but with far less torque.
Does the gearbox add backlash?
Planetary gearboxes of this type typically have some backlash. It matters for bidirectional fine positioning but not for continuous or one-direction moves.
Where is the Nema 8 Stepper Motor Bipolar w/ 64:1 Planetary Gearbox cheapest?
At RobotShop USA, for $90.26, as of our latest check.

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