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Gearboxes
Frame 42 Gearboxes
Specifications
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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InLine Planetary Specifications
| MODEL | DRAWING NUMBER | GEAR RATIO | BACKLASH (arc min) | MIN EFF (%) | GEARBOX LENGTH (in) | WT (lbs) | TORQUE | INERTIA | ||
|---|---|---|---|---|---|---|---|---|---|---|
| CONT. (in lbs) | PEAK (in lbs) | REFLECTED (oz in sec²) | GEARHEAD (oz in sec²) | |||||||
| 42P:3 | G2500007 | 3 | 6 | 90 | 4.73 | 11.5 | 2301 | 3597 | 0.016800 | 0.016410 |
| 42P:4 | G2500007 | 4 | 6 | 90 | 4.73 | 11.5 | 2195 | 3430 | 0.010320 | 0.010490 |
| 42P:5.5 | G2500007 | 5.5 | 6 | 90 | 4.73 | 11.5 | 2021 | 3159 | 0.008997 | 0.005878 |
| 42P:7 | G2500007 | 7 | 6 | 90 | 4.73 | 11.5 | 1711 | 2673 | 0.008766 | 0.003704 |
| 42P:10 | G2500007 | 10 | 6 | 90 | 4.73 | 11.5 | 1122 | 1684 | 0.008680 | 0.001841 |
| 42P:16 | G2500008 | 16 | 11 | 85 | 6.36 | 18 | 2379 | 3717 | 0.010320 | 0.011010 |
| 42P:22 | G2500008 | 22 | 11 | 85 | 6.36 | 18 | 2414 | 3772 | 0.008997 | 0.006156 |
| 42P:28 | G2500008 | 28 | 11 | 85 | 6.36 | 18 | 2438 | 3811 | 0.008766 | 0.003875 |
| 42P:40 | G2500008 | 40 | 11 | 85 | 6.36 | 18 | 2473 | 3865 | 0.008680 | 0.001925 |
| 42P:49 | G2500008 | 49 | 11 | 85 | 6.36 | 18 | 1867 | 2918 | 0.008766 | 0.003706 |
| 42P:55 | G2500008 | 55 | 11 | 85 | 6.36 | 18 | 2250 | 3516 | 0.008680 | 0.001866 |
| 42P:70 | G2500008 | 70 | 11 | 85 | 6.36 | 18 | 1890 | 2953 | 0.008680 | 0.001843 |
| 42P:100 | G2500008 | 100 | 11 | 85 | 6.36 | 18 | 1031 | 1547 | 0.008680 | 0.001823 |
Right Angle Specifications
| MODEL NUMBER | DRAWING NUMBER | GEAR RATIO | BACKLASH (arc min) | MIN. EFF. (%) | GEARHEAD LENGTH (in) | WT. (lbs) | MAX RATED CONTINUOUS TORQUE (in-lb) | MOMENTARY TORQUE(in-lb) | REFLECTED PINION INERTIA (oz in sec²) | GEARBOX INERTIA (oz in sec²) |
|---|---|---|---|---|---|---|---|---|---|---|
| 42RA:3 | G2500057 | 3 | 11 | 85 | 11.39 | 28.5 | 2301 | 3597 | 0.016800 | 0.026670 |
| 42RA:4 | G2500057 | 4 | 11 | 85 | 11.39 | 28.5 | 2179 | 3430 | 0.010320 | 0.016260 |
| 42RA:5.5 | G2500057 | 5.5 | 11 | 85 | 11.39 | 28.5 | 2021 | 3159 | 0.008997 | 0.008931 |
| 42RA:7 | G2500057 | 7 | 11 | 85 | 11.39 | 28.5 | 1711 | 2873 | 0.008766 | 0.005588 |
| 42RA:10 | G2500057 | 10 | 11 | 85 | 11.39 | 28.5 | 1122 | 1684 | 0.008680 | 0.002765 |
| 42RA:16 | G2500058 | 16 | 15 | 80 | 13.02 | 35 | 2379 | 3717 | 0.010320 | 0.011180 |
| 42RA:22 | G2500058 | 22 | 15 | 80 | 13.02 | 35 | 2414 | 3772 | 0.008997 | 0.006242 |
| 42RA:28 | G2500058 | 28 | 15 | 80 | 13.02 | 35 | 2438 | 3811 | 0.008766 | 0.003928 |
| 42RA:40 | G2500058 | 40 | 15 | 80 | 13.02 | 35 | 2473 | 3865 | 0.008660 | 0.001951 |
| 42RA:49 | G2500058 | 49 | 15 | 80 | 13.02 | 35 | 1867 | 2918 | 0.008766 | 0.003724 |
| 42RA:55 | G2500058 | 55 | 15 | 80 | 13.02 | 35 | 2250 | 3516 | 0.008680 | 0.001880 |
| 42RA:70 | G2500058 | 70 | 15 | 80 | 13.02 | 35 | 1890 | 2953 | 0.008680 | 0.001851 |
| 42RA:100 | G2500058 | 100 | 15 | 80 | 13.02 | 35 | 1031 | 1547 | 0.008680 | 0.001827 |
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.
Cycloidal gearboxes
The epicycloidal gearboxes are offered with the larger motors as they provide some unique features.
The Cycloidal gearboxes are typically 93% efficient at working speeds; thus makes them ideal for power transfer applications. These gearboxes are able to provide family of gear ratios and very high ratios in a compact fixed size. These gearboxes have momentary peak torque capacity five times the continuous ratings.
While the power transfer capacity of the gearbox is excellent, and the rugged construction of the units will survive much abuse, the epicycloidal motions will introduce sinusoidal velocity ripple into the system. As such, these gearboxes are excellent choices for step and repeat, or point A and B type functions. They are not good choices when the travel path, or travel velocity between the points is critical.
In addition to the standard mechanical features of the cycloidal gearbox, the package configuration allows the addition of a zero backlash feedback device. For more details refer to the drawings, however in brief, the feedback device is connected directly to the output shaft of the gearbox. Neither the gear ratio nor the backlash of the gears will affect the reading as there is a solid shaft driving the feedback device.
Due to the size, Cycloidal gearboxes are offered only with size 42 and larger motors.
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Cycloidal Gearboxes
Specifications
| Model Number | C:6 | C:11 | C:17 | C:29 |
| Drawing Number | M2400038 | M2400038 | M2400038 | M2400038 |
| Gear Ratio | 6 | 11 | 17 | 29 |
| Compatible Motors | U41, U42, U43 | U41, U42, U43 | U41, U42, U43 | U41, U42, U43 |
| Backlash (degrees) | 0.8-1.1 | 0.8-1.1 | 0.5-0.65 | 0.5-0.65 |
| Repeatability (degrees) | 0.01 | 0.01 | 0.01 | 0.01 |
| Minimum Efficiency (%) | 90 | 90 | 90 | 90 |
| Maximum Radial Load (lbs) | 1100 | 1100 | 1100 | 1100 |
| Maximum Axial Load (lbs) | 660 | 660 | 660 | 660 |
| Shaft Runout (in) | 0.001 | 0.001 | 0.001 | 0.001 |
| Radial Play (in) | 0.001 | 0.001 | 0.001 | 0.001 |
| End Play (in) | 0.0002 | 0.0002 | 0.0002 | 0.0002 |
| Flange Width (in) | 6.3 | 6.3 | 6.3 | 6.3 |
| Gearhead Length (in) | 5.0 | 5.0 | 5.0 | 5.0 |
| Weight (lbs) | 34.1 | 34.1 | 34.1 | 34.1 |
| Maximum Rated Continuous Torque (in-lb) | 601 | 1104 | 1500 | 1620 |
| Maximum Input RPM | 3000 | 3000 | 3000 | 3000 |
Government Projects & Defense Applications
Empire Magnetics has been awarded and completed US Navy contracts in excess of $100,000 as a prime contractor. The Cage code number assigned was OYMU1, CEC code 19665900H. As a subcontractor to RSI/Comsat, SAIC, Lockheed Martin, Westinghouse, General Electric and other prime contractors for the US Government, contracts in excess of $200,000 have been awarded and completed.
Nationwide & International Distributors for Specialty Motors & Complete Motor System Solutions
Empire Magnetics products are distributed by a nationwide and international network of motion control sales professionals. Your local distributor carries the drives and controls, and the accessories needed to build a complete motion control system.