| Model Number |
HT-U21 |
HT-U22 |
HT-U23 |
| Drawing Number |
list |
list |
list |
| Motor |
U21 |
U22 |
U23 |
| Pricing |
HT-U21 |
HT-U22 |
HT-U23 |
| NEMA Frame Size |
23 |
23 |
23 |
| Number of Magnetic Stacks |
1 |
2 |
3 |
| Step Angle |
1.8 |
1.8 |
1.8 |
| Accuracy Grade (%) |
3 |
3 |
3 |
| Detent Torque (oz-in) |
6 |
15 |
21 |
| Static Torque At Thermal Current
{unipolar} (oz-in) |
45 |
80 |
120 |
| Static Torque At Thermal Current
{parallel} (oz-in) |
50 |
85 |
110 |
| Static Torque At Thermal Current
{series} (oz-in) |
60 |
110 |
130 |
| Thermal Current {unipolar} (A) |
1.4 |
1.6 |
2.0 |
| Thermal Current {parallel} (A) |
1.6 |
1.8 |
2.3 |
| Thermal Current {series} (A) |
1.0 |
1.4 |
1.8 |
| Single Coil Inductance (mH) |
4.2 |
4.15 |
4 |
| Single Coil Resistance (ohm) |
3.6 |
2.9 |
2.6 |
| Series Inductance (mH) |
16.8 |
16.6 |
16 |
| Series Resistance (ohm) |
7.2 |
5.8 |
5.2 |
| Bearing Type |
C/F |
C/F |
C/F |
| Bearing Thrust Load (lbs) |
25 |
25 |
25 |
| Bearing Radial Load (lbs) |
50 |
50 |
50 |
| Bearing End Play (10-3 in) |
C/F |
C/F |
C/F |
| Bearing Radial Play (10-3 in) |
8 |
8 |
8 |
| Rotor Inertia (oz-in2) |
0.48 |
1.28 |
1.75 |
| Body Diameter (in) |
2.3 |
2.3 |
2.3 |
| Body Length (in) |
2 |
3.1 |
4 |
| Weight (lbs) |
1.6 |
2.4 |
3.2 |
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