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)
34P:3	G2500005	3	6	90	4.19	7	1285	2008	0.004901	0.004672
34P:4	G2500005	4	6	90	4.19	7	1219	1905	0.002522	0.002833
34P:5.5	G2500005	5.5	6	90	4.19	7	1113	1740	0.002040	0.001585
34P:7	G2500005	7	6	90	4.19	7	935	1461	0.001955	0.000998
34P:10	G2500005	10	6	90	4.19	7	552	828	0.001923	0.000496
34P:16	G2500006	16	11	85	5.31	8	1315	2055	0.002522	0.002824
34P:22	G2500006	22	11	85	5.31	8	1333	2083	0.002040	0.001580
34P:28	G2500006	28	11	85	5.31	8	1346	2103	0.001955	0.000995
34P:40	G2500006	40	11	85	5.31	8	1364	2132	0.001923	0.000495
34P:49	G2500006	49	11	85	5.31	8	1015	1587	0.001955	0.000942
34P:55	G2500006	55	11	85	5.31	8	1232	1925	0.001923	0.000476
34P:70	G2500006	70	11	85	5.31	8	1027	1605	0.001923	0.000468
34P:100	G2500006	100	11	85	5.31	8	507	761	0.001923	0.000462

Right Angle Specifications

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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)
34RA:3	G2500055	3	11	85	9.16	12.5	1285	2008	0.004901	0.011760
34RA:4	G2500055	4	11	85	9.16	12.5	1219	1905	0.002522	0.006818
34RA:5.5	G2500055	5.5	11	85	9.16	12.5	1113	1740	0.002040	0.003693
34RA:7	G2500055	7	11	85	9.16	12.5	935	1461	0.001955	0.002300
34RA:10	G2500055	10	11	85	9.16	12.5	552	828	0.001923	0.001134
34RA:16	G2500056	16	15	80	10.29	13.5	1315	2055	0.002522	0.002944
34RA:22	G2500056	22	15	80	10.29	13.5	1333	2083	0.002040	0.001644
34RA:28	G2500056	28	15	80	10.29	13.5	1346	2103	0.001955	0.001035
34RA:40	G2500056	40	15	80	10.29	13.5	1364	2132	0.001923	0.000514
34RA:49	G2500056	49	15	80	10.29	13.5	1015	1587	0.001955	0.000955
34RA:55	G2500056	55	15	80	10.29	13.5	1232	1925	0.001923	0.000488
34RA:70	G2500056	70	15	80	10.29	13.5	1027	1605	0.001923	0.000475
34RA:100	G2500056	100	15	80	10.29	13.5	507	761	0.001923	0.000465

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.