High Torque Stepper Motors

Mechanical, Electrical & Environmental Specifications

	Unit	Size HT17	Size HT23	Size HT34
Shaft Run-Out	in mm	0.0005 0.0127	0.002 0.0508	0.002 0.0508
Radial Play	inch/Lbs. mm/kg	0.001 max @ 1 lb 0.025 max @ 0.45 kg
End Play	inch/Lbs. mm/kg	0.003 max @ 2.2 lbs 0.076 max@ 1 kg
Perpendicularity	—	0.003
Concentricity	in mm	0.002 0.0508
Operating Temperature Range	°C	-20 to +50
Insulation Class	—	130°C Class B
Lead Wire Gauge	—	26 AWG	22 AWG	22 AWG
Maximum Radial Load	lbs kg	5 2.27	15 6.81	25 11.35
Maximum Thrust Load	lbs kg	3 1.362	25 11.35	50 22.7

Design Tips

• Series connect lead wires for best torque at low speeds.
• Center tap to end or parallel connect lead wires for best torque at higher speeds.
• Keep motor case temperature below 100° C. This can be achieved by lowering the motor current or limiting the duty cycle.
• Allow sufficient time to accelerate load.
• Size motor with 100% safety factor for required torque @ speed.
• Do not disassemble motors. A significant reduction in motor performance will result.
• Do not machine shafts without consulting TOPS.
• Do not disconnect motor from drive while in operation.
• Do not use holding torque/detent torque of motor as fail safe brake.

Motion Installation Tips

• Mount the motor securely against a surface with good thermal conductivity such as steel or aluminum.
• Properly align the motor with the load using a flexible coupling.
• Protect the motor shaft from excessive thrust, overhung and shock loads.