KAH Hollow Shaft Rotary Actuator

Applications:

KAH hollow rotary actuators are widely used in: electronic and semiconductor equipment, precision CNC machine tools, 3C equipment, precision laser processing equipment, LED equipment, testing equipment, medical equipment, robots and special robotic arms, printing machinery, inkjet equipment, glass processing equipment, precision measuring instruments, etc. field.

Product details:

High accuracy: The absolute positioning accuracy up to 10 arc seconds (0.0028 degrees).

Large torque: Small size, large torque; output torque up to 800 Nm.

Hollow Hole: Large-aperture internal threading hole for easy passage of cables, gas camps, laser beams, etc.

Long life: The accuracy remains unchanged after use for more than 20,000 hours.

Zero backlash: Harmonic drive with zero backlash.

Integration: Integrated strain wave gear harmonic reducer, torque motor, electromagnetic brake, encoder, and driver.

Fast response: Excellent dynamic response performance; ideal for laser processing, and automation equipment.

Low vibration: Extremely low vibration and noise; the best choice for applications such as semiconductors and medical imaging equipment.

High protection standards: Up to IP67 protection level.

Maintenance-free: No need for regular maintenance; no need to change grease, etc.

If you want to know more about our products, you can download our Product Introduction Manual and 3D Model here.

The specifications of KAH-14 and KAH-17 series rotary actuators

Series			KAH-14			KAH-17
Mode: KAH-			14A	14B	14C	17A	17B	17C	17D
Reduction ratio			1:51	1:81	1:101	1:51	1:81	1:101	1:121
Maximum torque at start and stop		N·m	23	29	34	42	53	66	66
Maximum average torque		N·m	8.6	13.5	13.5	32	33	49	49
220VAC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	127.5 70.6 1.96 0.56 15.36	80.2 44.4 1.56 0.56 24.10	64.4 35.6 1.41 0.44 30.68	119.6 60.8 3.35 1.65 19.39	75.3 38.3 2.10 1.04 31.73	60.4 30.7 2.51 1.24 39.51	50.4 25.6 2.09 1.04 47.11
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	4.311 5.256 23.85			2.135 3.869 30.66
110VAC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	40.8 70.6 4.06 1.17 7.36	64.8 44.4 3.23 1.16 11.68	80.8 35.6 3.03 0.93 14.57	100.0 60.8 6.78 3.35 9.56	63.0 38.3 8.26 4.18 7.85	50.5 30.7 7.08 3.53 13.87	42.1 25.6 6.26 2.95 16.58
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	2.089 2.593 11.07			1.036 1.684 14.79
DC bus voltage 48VDC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	88.2 70.6 7.59 2.84 3.03	55.6 44.4 7.67 3.57 3.78	44.6 35.6 5.66 2.25 6.01	78.4 60.8 16.50 8.47 3.74	49.4 38.3 11.23 5.34 6.12	39.6 30.7 13.20 6.53 7.50	33.1 25.6 10.98 5.46 8.98
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	0.275 0.352 6.32			0.262 0.313 7.98
Absolute Encoder	Encoder type Resolution (single motor revolution) Motor Multi-turn counter		Multi-turn hollow shaft absolute encoder 219 (524,288), 222 (4,194,304) or 224 (16,777,216) 216 (65,536)
Incremental encoder	Resolution		Hollow shaft incremental encoder, 40000 pulse/rev (multiplied by 4)
	Output shaft resolution	pulse/rev	2040000	3240000	4040000	2040000	3240000	4040000	4840000
Uni-directional positional accuracy		Arc sec	40	30	30	40	30	30	30
Repeatability of positioning accuracy		Arc sec	8	7	7	8	7	7	7
Overturning stiffness		x104 N·m /rad	7.05	9.8		22.08	25.8
Torsional stiffness		x104 N·m /rad	0.46	0.6		1.07	1.3
Inertia moment	Without brake With brake	kg m2 kg m2	0.09 0.11	0.19 0.22	0.28 0.31	0.15 0.17	0.41 0.45	0.51 0.56	1.16 1.28
Mass	Without brake With brake	kg kg	1.3 1.5			1.8 2.0
Number of motor poles			16
Motor insulation			Heat-resistant class: F(155℃) Insulation resistance: more than 200MΩ(DC500V) Dielectric strength: AC1500V (1 minute)
Protection structure (Degrees of Protection)			Totally enclosed self-cooled type (default: IP65, special customized: IP67)

The specifications of KAH-20 and KAH-25 series rotary actuators

Series			KAH-20					KAH-25
Mode: KAH-			20A	20B	20C	20D	20E	25A	25B	25C	25D	25E
Reduction ratio			1:51	1:81	1:101	1:121	1:161	1:51	1:81	1:101	1:121	1:161
Maximum torque at start and stop		N·m	69	91	102	108	113	121	169	194	207	217
Maximum average torque		N·m	42	58	61	61	61	68.5	107	133	133	133
220VAC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	119.6 60.8 4.53 2.12 19.81	75.3 38.3 3.89 1.85 31.35	60.4 30.7 3.41 1.56 39.10	50.4 25.6 2.78 1.30 46.92	37.9 19.3 2.21 0.98 62.24	102.0 58.8 8.05 3.38 20.28	64.2 37.0 7.08 3.32 32.21	51.5 29.7 6.52 3.31 40.16	43.0 24.8 5.81 2.76 48.11	32.3 18.6 4.58 2.08 64.02
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	2.135 3.869 30.66					1.779 3.375 40.84
110VAC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	100.0 60.8 9.49 4.28 9.82	63.0 38.3 7.87 3.72 15.61	50.5 30.7 7.08 3.14 19.45	42.1 25.6 6.25 2.62 23.32	31.7 19.3 4.91 1.97 31.04	80.4 54.9 13.57 5.69 12.04	50.6 34.6 11.93 5.60 19.12	40.6 27.7 10.99 5.58 23.84	33.9 23.1 9.78 4.66 28.56	25.5 17.4 7.71 3.52 38.00
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	1.036 1.684 14.79					0.809 1.534 18.56
DC bus voltage 48VDC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	78.4 60.8 17.89 10.88 3.86	49.4 38.3 18.86 12.03 4.82	39.6 30.7 13.33 7.97 7.65	33.1 25.6 11.79 6.66 9.16	24.8 19.3 9.27 5.03 12.19	60.8 51.0 28.61 16.19 4.23	38.3 32.1 32.01 20.27 5.28	30.7 25.7 23.15 15.87 8.38	25.6 21.5 20.62 13.25 10.04	19.3 16.2 16.24 9.96 13.36
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	0.262 0. 313 7.98					0.239 0.282 10.57
Absolute Encoder	Encoder type Resolution (single motor revolution) Motor Multi-turn counter		Multi-turn hollow shaft absolute encoder 219 (524,288), 222 (4,194,304) or 224 (16,777,216) 216 (65,536)
Incremental encoder	Resolution		Hollow shaft incremental encoder, 40000 pulse/rev (multiplied by 4)
	Output shaft resolution	pulse/rev	2040000	3240000	4040000	4840000	6440000	2040000	3240000	4040000	4840000	6440000
Uni-directional positional accuracy		Arc sec	40	30	30	30	30	40	30	30	30	30
Repeatability of positioning accuracy		Arc sec	8	7	7	7	7	8	7	7	7	7
Overturning stiffness		x104 N·m /rad	23.5	27.3				34.7	42.8
Torsional stiffness		x104 N·m /rad	1.8	2.3				3.4	4.6
Inertia moment	Without brake With brake	kg m2 kg m2	0.19 0.22	0.57 0.63	0.86 0.95	1.23 1.35	2.18 2.35	0.49 0.58	1.24 1.51	1.93 2.31	2.85 3.31	5.01 5.97
Mass	Without brake With brake	kg kg	2.2 2.5					3.2 3.6
Number of motor poles			16
Motor insulation			Heat-resistant class: F(155℃) Insulation resistance: more than 200MΩ(DC500V) Dielectric strength: AC1500V (1 minute)
Protection structure (Degrees of Protection)			Totally enclosed self-cooled type (default: IP65, special customized: IP67)

The specifications of KAH-32 and KAH-40 series rotary actuators

Series			KAH-32					KAH-40
Mode: KAH-			32A	32B	32C	32D	32E	40A	40B	40C	40D	40E
Reduction ratio			1:51	1:81	1:101	1:121	1:161	1:51	1:81	1:101	1:121	1:161
Maximum torque at start and stop		N·m	267	376	411	436	459	497	641	702	762	800
Maximum average torque		N·m	133	206	267	267	267	242	351	460	557	557
220VAC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	88.2 51.0 14.37 5.96 22.30	55.6 32.1 12.74 5.82 35.42	44.6 25.7 11.17 6.04 44.17	37.2 21.5 9.89 5.05 52.92	28.0 16.1 7.82 3.79 70.41	76.5 43.1 22.79 8.67 27.91	48.1 27.2 18.51 7.92 44.32	38.6 21.8 16.26 8.32 55.26	32.2 18.2 14.73 8.41 66.23	24.2 13.7 11.62 6.32 88.09
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	1.438 3.165 44.29					1.024 3.026 50.87
110VAC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	68.6 45.1 25.29 10.50 12.67	43.2 28.4 22.42 10.24 20.12	34.7 22.8 19.66 10.64 25.09	28.9 19.0 17.41 8.88 30.06	21.7 14.3 13.77 6.68 39.99	52.9 35.3 35.85 14.55 16.63	33.3 22.2 29.12 13.29 26.41	26.7 17.8 25.58 13.97 32.93	22.3 14.9 23.17 14.11 39.47	16.8 11.2 18.29 10.61 52.50
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	0.730 1.408 22.51					0.530 1.207 44.96
DC bus voltage 48VDC	Maximum speed Rated speed Maximum current Rated current Torque constant	RPM RPM Arms Arms N m/Arms	51.00 41.20 51.25 25.53 5.21	32.10 25.90 57.94 31.74 6.49	25.70 20.80 39.83 25.87 10.32	21.50 17.40 35.33 21.64 12.34	16.10 13.00 27.95 16.26 16.42	35.30 29.40 72.66 35.38 6.84	22.20 18.50 75.06 41.10 8.54	17.80 14.90 51.81 33.95 13.55	14.90 12.40 46.98 34.34 16.22	11.20 9.30 37.05 25.80 21.59
	Phase resistance Phase inductance Back EMF	Ohms mH Vrms/kRPM	0.188 0. 265 12.05					0.139 0.207 17.48
Absolute Encoder	Encoder type Resolution (single motor revolution) Motor Multi-turn counter		Multi-turn hollow shaft absolute encoder 219 (524,288), 222 (4,194,304) or 224 (16,777,216) 216 (65,536)
Incremental encoder	Resolution		Hollow shaft incremental encoder, 40000 pulse/rev (multiplied by 4)
	Output shaft resolution	pulse/rev	2040000	3240000	4040000	4840000	6440000	2040000	3240000	4040000	4840000	6440000
Uni-directional positional accuracy		Arc sec	40	30	30	30	30	40	30	30	30	30
Repeatability of positioning accuracy		Arc sec	8	7	7	7	7	8	7	7	7	7
Overturning stiffness		x104 N·m /rad	87.5	113.6				149.5	187.4
Torsional stiffness		x104 N·m /rad	7.6	9.9				14	18.6
Inertia moment	Without brake With brake	kg m2 kg m2	1.72 2.03	4.34 5.29	6.76 8.09	9.98 11.59	17.54 20.90	3.91 4.62	9.86 12.03	15.36 18.39	22.68 26.35	39.86 47.50
Mass	Without brake With brake	kg kg	6.2 6.7					9.1 9.7
Number of motor poles			16
Motor insulation			Heat-resistant class: F(155℃) Insulation resistance: more than 200MΩ(DC500V) Dielectric strength: AC1500V (1 minute)
Protection structure (Degrees of Protection)			Totally enclosed self-cooled type (default: IP65, special customized: IP67)

KAH Rotary Actuators Product Bending Moment, Radial Force and Axial Force Parameter Values
Model KAH-	14	17	20	25	32	40
Allowable Value of Bending Moment Mb	41	72	140	243	460	600
Bending Moment Momentary Allowable Value Mb	80	140	280	480	900	1200
Allowable Value of Radial Force Ft	270	400	650	900	1350	2000
Radial Force Momentary Allowable Value Ft	490	700	1150	1600	2300	3500
Allowable Value of Axial Force Fa	270	400	650	900	1350	2000
Momentary Allowable Value of Axial Force Fa	490	700	1150	1600	2300	3500

KAH Rotary Actuators Product Accuracy Retention Life
Model KAH-	14	17	20	25	32	40
Accuracy Retention Life (Reduction Ratio 1/51)	15000 hours
Accuracy Retention Life (Other Reduction Ratio)	20000 hours

Note: The parameter value in the table refers to the life under the condition that the positioning accuracy and other parameters are kept unchanged. If the user allows other parameters to be slightly reduced, the use can be extended.