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1. Product can be customized according to your demand 2.Current and torque are adjustable, 3. Widely used, 4. Driver is availabe - details see: https://www.machineto.com/20-series-high-precision-hybrid-stepper-motor-10239369

Step angle tolerance	± 5%
Maximum temperature	80ºC
Ambient temperature	– 20ºC ~ +50ºC
Insulation resistance	100MΩmin 500VDC
Di-electric strength	500AC 1 minute
Radial play	0.02Max (450g -load)
End play	0.08Max(450g -load)
Resistance tolerance	± 10%
Inductance tolerance	± 20%

20 HJA for connector:

Model	Step angle	Number of phase	Current /phase	Resistance /phase	Inductance /phase	Holding toque	Rotor inertia	Wiring diagram	Motor mass	Motor length
			A	Ω	mH	mN.m	g.cm2		kg	mm
20HJA428-15	1.8°	2	0.48	25	8.3	17	1.8	a	0.05	28
20HJA430-20	1.8°	2	0.6	6.5	1.7	18	2.6	a	0.06	30
20HJA430-24	1.8°	2	0.4	9.0	3.6	35	2.1	a	0.06	30
20HJA438-18	1.8°	2	0.6	10.5	5.7	42	3.3	a	0.08	38
20HJA448-20	1.8°	2	0.65	18	7.9	31	4.2	a	0.11	48
20HJA630-28	1.8°	4	0.5	11	1.9	12	2.0	b	0.06	30
20HJA630-32	1.8°	4	0.5	11	1.9	12	2.0	b	0.06	30
20HJA642-20	1.8°	4	0.8	5.4	1.5	30	3.6	b	0.8	42
20HJA648-22	1.8°	4	0.4	20	4.5	23	4.1	b	0.11	48