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-in2)
17P:3 G2500001 3 0.10 90 2.62 1 167 261 0.117
17P:4 G2500001 4 0.10 90 2.62 1 158 248 0.0986
17P:5.5 G2500001 5.5 0.10 90 2.62 1 143 223 0.0806
17P:7 G2500001 7 0.10 90 2.62 1 119 158 0.0709
17P:10 G2500001 10 0.10 90 2.62 1 56 84 0.0616
17P:16 G2500002 16 0.17 85 3.28 1.6 169 264 0.1167
17P:22 G2500002 22 0.17 85 3.28 1.6 171 267 0.0947
17P:28 G2500002 28 0.17 85 3.28 1.6 172 269 0.0939
17P:40 G2500002 40 0.17 85 3.28 1.6 184 272 0.0605
17P:49 G2500002 49 0.17 85 3.28 1.6 127 199 0.0684
17P:55 G2500002 55 0.17 85 3.28 1.6 156 243 0.0602
17P:70 G2500002 70 0.17 85 3.28 1.6 128 201 0.0601
17P:100 G2500002 100 0.17 85 3.28 1.6 52 77 0.0600
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.