NEMA 11 Size 28 mm Hollow Shaft Stepper Motor
Compact hollow shaft stepper motor for precision rotary motion where a through-hole design supports compact machine layouts, through-axis routing, encoder assembly options, and flexible OEM integration.
Motor Characteristics
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| Model No. | Rated Voltage (V) |
Current (A RMS) |
Resistance (Ω) |
Inductance (mH) |
Holding Torque (N·m) |
Detent Torque (N·m) |
Motor Length (mm) |
|---|---|---|---|---|---|---|---|
| 11HS2033 | 2.1 | 1.0 | 2.1 | 1.5 | 0.053 | 0.003 | 33 |
| 11HS2045 | 4.1 | 1.0 | 4.1 | 4.0 | 0.100 | 0.004 | 45 |
For special windings, shaft changes, lead wire changes, or application-specific integration needs, contact DINGS’ Motion USA for customization support.
Dimensional Drawing
Torque Curve
Tested at 24 VDC with DS-OLS8-FRS4 bipolar chopper drive at rated current RMS. Motor torque may vary with voltage and drive conditions; a 50% torque safety margin is recommended.
Downloads
Customizations
Hollow shaft stepper motors can be customized to meet application-specific mechanical, electrical, and integration requirements. The hollow shaft design is especially useful when cabling, tubing, light transmission, or a rotating pass-through is needed through the motor axis.
Single shaft, double shaft, custom shaft length, D-cut, flat, or application-specific machining.
Rated current, voltage, winding, lead wire length, connector type, and cable routing requirements.
Hollow type encoder assembly options, encoder integration, closed-loop feedback, and positioning support for higher accuracy requirements.
Custom mounting details, bearing considerations, through-hole requirements, and compact package needs.
Application-specific protection, coating, durability, corrosion resistance, and clean operation needs.
Prototype, quick-ship evaluation, and production-level customization for OEM equipment builds.
Review holding torque, speed, load, duty cycle, and driver selection with the DINGS’ Motion USA team.
Designed around your system to simplify installation, improve fit, and support repeatable production.
Encoder Options
NEMA 11 hollow shaft motors can support hollow type encoder assembly options. Encoder selection is available for feedback requirements such as position confirmation, speed monitoring, and closed-loop motion control.
Compact hollow encoder option with single-ended and differential output code options.
Expanded hollow encoder option with additional resolution choices for higher feedback requirements.
Single-ended and differential output options are available depending on the required electrical interface.
Encoder configuration can be reviewed with DINGS’ Motion USA based on motion profile, driver, and control requirements.
EK1 Encoder
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| EK1 Encoder Specification | 100 | 108 | 120 | 125 | 128 | 200 | 250 | 256 | 300 | 360 | 400 | 500 | 1000 | 512 | 720 | 800 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single-ended Output Code | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Differential Output Code | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P |
EK2 Encoder
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| EK2 Encoder Specification | 50 | 100 | 192 | 200 | 250 | 256 | 360 | 400 | 500 | 720 | 900 | 1000 | 1250 | 2000 | 2500 | 4000 | 5000 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single-ended Output Code | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | ||||
| Differential Output Code | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q |
Part Number Builder
Hollow shaft stepper motor part numbers are structured by motor size, motor type, step angle, motor length, lead wire configuration, shaft configuration, rated current, and customer sequence number.
Motor size. NEMA 11 / 28 mm frame.
Motor type. HS = Hollow Shaft Stepper Motor.
Step angle. 2 = 2-phase, 1.8° step angle. 4 = 2-phase, 0.9° step angle.
Motor length code. Examples include 033 for 11HS2033 and 045 for 11HS2045.
Lead wire configuration. 4 = bipolar / 4 flying leads. 6 = unipolar / 6 flying leads.
Shaft configuration. D = double shaft. S = single shaft.
Rated current code. XXX = rated current × 100 amps. Example: 1.00 A = 100.
Customer sequence number for standard or custom configuration tracking.
Need help selecting or customizing a NEMA 11 hollow shaft motor?
DINGS’ Motion USA can help review holding torque, through-hole needs, shaft configuration, custom winding, lead wire requirements, hollow encoder options, driver selection, and production customization.