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nema 11 series stepper motor, 28mm diameter, high torque, phase current :0.25-1.4A, 2 and 4 phase - details see: https://www.machineto.com/nema-11-12v-high-torque-dc-stepper-motor-10239490

28HS nema11 series stepper moter :

Items	Spec.
Step Angle	1.8°
Step Angle Accuracy	±5%
Resistance Accuracy	±10%
Inductance Accuracy	±20%
Temperature Rise	80°C Max
Ambient Temperature	-20°C~+50°C
Insulation Resistance	100MΩ Min., 500VDC
Dielectric Strength	500VAC for one minute
Shaft Radial Play	0.02Max (450g-load)
Shaft Axial Play	0.08Max (450g-load)

Model	Phase No.	Voltage	Current	Inductance	Resistance	Holding Torque	Rotor Inertia	Weight	Length	Wire No.
		V	A	mh ±20%	Ω ±10%	kg.cm	g.cm ²	kg	mm
28HS28-0804A	2	2	0.8	1.6	2.5	0.45	8	0.095	28	4
28HS32-0254A	2	12	0.25	14	25	0.4	9	0.1	32	4
28HS45-0504A	2	3.4	0.5	4.8	6.8	0.75	12	0.14	45	4
28HS45-0674A	2	12	0.67	4.9	6.8	0.95	12	0.14	45	4
28HS45-0704A	2	4.9	0.7	3	3.4	1.3	12	0.14	45	4
28HS45-1406A	4	1.4	1.4	0.55	1	0.8	12	0.14	45	6
28HS51-0804A	2	4	0.8	3.3	4.9	1	18	0.18	51	4
28HS51-1004A	2	2.3	1	1.8	2.3	0.9	18	0.18	51	4