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)
17P:3	G2500001	3	6	90	2.62	1	167	261	0.000216	0.000167
17P:4	G2500001	4	6	90	2.62	1	158	248	0.000135	0.000105
17P:5.5	G2500001	5.5	6	90	2.62	1	143	223	0.000117	0.000059
17P:7	G2500001	7	6	90	2.62	1	119	158	0.000114	0.000037
17P:10	G2500001	10	6	90	2.62	1	56	84	0.000113	0.000018
17P:16	G2500002	16	10	85	3.28	1.6	169	264	0.000135	0.000105
17P:22	G2500002	22	10	85	3.28	1.6	171	267	0.000117	0.000058
17P:28	G2500002	28	10	85	3.28	1.6	172	269	0.000114	0.000037
17P:40	G2500002	40	10	85	3.28	1.6	174	272	0.000113	0.000018
17P:49	G2500002	49	10	85	3.28	1.6	127	199	0.000114	0.000035
17P:55	G2500002	55	10	85	3.28	1.6	156	243	0.000113	0.000018
17P:70	G2500002	70	10	85	3.28	1.6	128	201	0.000113	0.000017
17P:100	G2500002	100	10	85	3.28	1.6	52	77	0.000113	0.000017

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)
17RA:3	G2500051	3	6	90	2.62	1	167	261	0.000216	0.000167
17RA:4	G2500051	4	6	90	2.62	4	158	248	0.000135	0.000105
17RA:5.5	G2500051	5.5	6	90	2.62	4	143	223	0.000117	0.000587
17RA:7	G2500051	7	6	90	2.62	4	119	158	0.000114	0.000037
17RA:10	G2500051	10	6	90	2.62	4	56	84	0.000113	0.000018
17RA:16	G2500052	16	11	85	3.28	1.6	169	264	0.000135	0.000105
17RA:22	G2500052	22	11	85	3.28	1.6	171	267	0.000117	0.000058
17RA:28	G2500052	28	11	85	3.28	1.6	172	269	0.000114	0.000037
17RA:40	G2500052	40	11	85	3.28	1.6	174	272	0.000113	0.000018
17RA:49	G2500052	49	11	85	3.28	1.6	127	199	0.000114	0.000035
17RA:55	G2500052	55	11	85	3.28	1.6	156	243	0.000113	0.000018
17RA:70	G2500052	70	11	85	3.28	1.6	128	201	0.000113	0.000017
17RA:100	G2500052	100	11	0.80	3.28	1.6	52	77	0.000113	0.000017

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.