Specifications
Frame Size |
2.36 in |
Motor Length |
3.48 in. |
Speed-Torque Characteristics |
 Speed - Torque Characteristics |
Holding Torque |
768 oz-in |
Current per Phase (A/phase) |
1.4 |
Type |
Geared |
Shaft/Gear Type |
Harmonic Gear |
Gear Ratio (X:1) |
50 :1 |
Gear Type |
Harmonic, Non Backlash (0 arc min), Centered Shaft |
Motor Connection Type |
Flying Leads |
Shaft |
Single |
Basic Step Angle |
0.72º |
Output Step Angle |
0.0144 ° |
Connection Type |
New Pentagon (Bipolar) |
Lead Wires |
5 |
Rotor Inertia |
1.15 oz-in² |
Lost Motion |
0.7 arc min max. |
RoHS Compliant |
Yes |
Safety Standards |
UL CSA EN CE |
Insulation Resistance |
100 MΩ minimum under normal temperature and humidity, when measured by a 500 VDC megger between the windings and the motor casing. |
Dielectric Strength |
Sufficient to withstand 1.5 kV, 50 Hz or 60 Hz applied for 1 minute between the windings and casing under normal temperature and humidity. |
Temperature Rise |
Temperature rise of the coil measured by the Change Resistance Method is 144ºF (80ºC) or less (at rated current, at standstill, five phases energized). |
Insulation Class |
Class B [266ºF (130ºC)] [Recognized as Class A 221ºF (105ºC) by UL standard] |
Ambient Temperature Range |
32ºF ~ 104ºF (0ºC ~ 40ºC) (nonfreezing) |
Ambient Humidity |
85% or less (noncondensing) |
Shaft Runout |
0.002 in. (0.05 mm) T.I.R. at top of output shaft |
Concentricity |
0.003 in. (0.075 mm) T.I.R. |
Perpendicularity |
0.003 in. (0.075 mm) T.I.R. |
Radial Play |
0.001 in. (0.025 mm) max. of 1.12 lb. (5 N) |
Axial Play |
0.003 in. (0.075 mm) max. of 2.2 lb. (10 N) |
Radial Load |
0 in. from Shaft End = 72 lb0.2 in. from Shaft End = 83 lb0.39 in. from Shaft End = 99 lb0.59 in. from Shaft End = 123 lb0.79 in. from Shaft End = 162 lb |
Axial Load |
101 lb |
Features
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Harmonic Geared (HG) Stepping Motors The PK Series 0.72°stepping motor offers high torque, our lowest vibration and noise. This motor is wound in the bipolar New Pentagon configuration and therefore, require a New Pentagon bipolar type driver. The New Pentagon configuration ensures that maximum torque is being generated by the motor on every step. The New Pentagon configuration also provides extremely smooth motion as well as maintaining torque and step accuracy regardless of the step resolution.  The harmonic gear offers unparalleled precision in positioning and features a simple construction utilizing the metal's elastomechanical property, comprising just three basic components: a wave generator, flex spline and circular spline. Available in 0.79 in. (20mm), 1.65 in. (42mm), 2.36 in. (60mm) and 3.54 in. (90mm) frame sizes. Combines three basic parts. The flex spline is bent into an oval shape by the wave generator. The teeth at the long axis of the oval mesh with the circular spline, while the teeth at the short axis of the oval are completely separate from it.
 Encoder Option Available The PK Series stepping motor with encoder offers high torque and precise feedback capability.
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Rotating the wave generator (input) clockwise while keeping the circular spline fixed in position will subject the flax spline to elastic deformation, causing a gradual shift in the point of engagement between the circular spline and flex spline.
When the wave generator completes one revolution, the flex spline has rotated two fewer teeth than the circular spline has, resulting in the movement of the flex spline for the difference in the tooth count (two teeth) in the opposite direction of the wave generator's rotation (i.e. counterclockwise). This movement translates into output, thereby reducing the speed.
