Stepping Motors - PK Series with Gearhead

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PK Series Stepping Motors

1.65 in. (42 mm) 2.36 in. (60 mm) 3.54 in. (90 mm)
(Not all Gear Types shown)

	Non-backlash		Low Backlash
Gear Type
Gear Type	Harmonic Gear	Planetary Gear (PN)	Planetary Gear (PS)	Taper Hobbed Gear
Features	High accuracy positioning High permissible / maximum torque High gear ratios, high resolution	High speed (low gear ratio), high accuracy positioning High permissible / maximum torque	High speed (low gear ratio) High permissible / Maximum torque Low backlash	Wide variety of low gear ratios, high-speed operation
Output Shaft	Centered	Centered	Centered	Offset
Gear Ratios	50:1 100:1	5:1 7.2:1 10:1 25:1 36:1 50:1	5:1 7.2:1 10:1 25:1 36:1 50:1	3.6:1 7.2:1 10:1 20:1 30:1
Available Frame Sizes	0.79 in. (20 mm) 1.65 in. (42 mm) 2.36 in. (60 mm)	1.10 in. (28 mm) 1.65 in. (42 mm) 2.36 in. (60 mm)	1.10 in. (28 mm) 1.65 in. (42 mm) 2.36 in. (60 mm) 3.54 in. (90 mm)	1.10 in. (28 mm) 1.65 in. (42 mm) 2.36 in. (60 mm)
Maximum Torque	240 lb-in (28 N·m)	177 lb-in (20 N·m)	320 lb-in (37 N·m)	35 lb-in (4 N·m)
Permissible Torque	70 lb-in (8 N·m)	70 lb-in (8 N·m)	320 lb-in (37 N·m)-	-
Backlash (Reference Value)	0 arc min	3 arc min	35 arc min	60 arc min
Minimum Resolution	0.0072°/step	0.0144°/step	0.0144°/step	0.024°/step
Maximum Output Shaft Speed	70 r/min	600 r/min	600 r/min	500 r/min
Connection Type	New Pentagon (Bipolar)	New Pentagon (Bipolar)	New Pentagon (Bipolar)	New Pentagon (Bipolar)
Lead Wires	5	5	5	5