Empire Magnetics Inc. prepares gearboxes to operate in the same environments as the motors and resolvers. We start with high quality planetary gearboxes. These units are selected to provide maximum torque capacity with the smallest practical volume. We then upgrade the materials construction and lubrication to meet the requirements of the environment.

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Specifications

Model Number Drawing Number Gear Ratio Backlash (degrees) Min Eff. (%) Gearhead Length (in) Wt. (lbs) Max Rated Contin. Torque (in-lb) Momentary Torque (in-lb) Reflected Inertia (oz-in^2)
23P:3 G2500003 3 0.10 90 2.66 1.75 380 594 0.468
23P:4 G2500003 4 0.10 90 2.66 1.75 360 562 0.398
23P:5.5 G2500003 5.5 0.10 90 2.66 1.75 317 496 0.345
23P:7 G2500003 7 0.10 90 2.66 1.75 263 411 0.317
23P:10 G2500003 10 0.10 90 2.66 1.75 119 179 0.291
23P:16 G2500004 16 0.17 85 3.48 2.75 376 587 0.422
23P:22 G2500004 22 0.17 85 3.48 2.75 380 594 0.417
23P:28 G2500004 28 0.17 85 3.48 2.75 384 600 0.415
23P:40 G2500004 40 0.17 85 3.48 2.75 388 607 0.568
23P:49 G2500004 49 0.17 85 3.48 2.75 286 447 0.320
23P:55 G2500004 55 10 85 3.48 2.75 347 542 0.293
23P:70 G2500004 70 0.17 85 3.48 2.75 288 450 0.292
23P:100 G2500004 100 0.17 85 3.48 2.75 110 164 0.292
Gearboxes for stepper motors and brushless motors are designed for the accurate positional functions desired of such systems.
All of the planetary gearheads provide "in line" power transfer so there is no offset from the motor shaft to the output shaft of the gearhead.
Vacuum rated gearboxes have all the materials selected or replaced with items that are compatible with VC, VS, or VX grades. The VS and VX grades are cleaned in the same exacting fashion as other components of this vacuum level.
For VX grade we offer dry film lubrications as an option, while the vapor pressure is lower on dry film lubrications, the wear life is also lower. The application specifics must be considered to make the decision.
Planetary gearboxes are available for stepper motors from size 17 to size 65, adapted versions of these same gearboxes can be mounted to brushless servo motors as well.

Other gearbox types:

For specific applications custom units using spur gears can be provided. Typically these are useful on very small motors such as the size 11.
In other applications where weight or space is highly constrained, we can offer harmonic style gearboxes. These gearboxes offer high ratios (but not low ones) in a compact lightweight design. They offer low backlash, but they are not as stiff as the other gearboxes. They do offer smooth motions for tool path applications.