D28.1 UHV Stepper Motor
1.8°, two phase hybrid stepper motors (1 x 10-10 mBar)
From
£841.00 excl. VAT and transportation cost
55 mNm, NEMA 11
Overview
New AML UHV stepper motor size.
Compact UHV stepper motor. Ideal for space restricted applications with low torque requirements.
- Suitable for use below 1 x 10-10 mBar (7.5 x 10-11 Torr)
- Continuous running in vacuum at high torque and step rates with AML drive
- Bakeable to 200 °C
- Step angle of 1.8°
- Step angle tolerance of ±5%
- Operational temperature range -65 °C to +190 °C
- Embedded thermocouple or PT100 sensor
- Open construction with all internal spaces vented
- Cryogenic extended operating temperature option available, range -196 °C to +190 °C
- Gamma radiation hard versions available 1 x 106 Gy
- Standard motors are fitted with open stainless steel bearings, lubricated with NyeTorr® 6300 ultra low outgassing UHV grease
- Hybrid silicone nitride ceramic bearings option available, dry lubricated with tungsten disulfide
- Custom shaft modifications available
Technical Data
Specifications
| Specification | Value |
|---|---|
| Motor type | Two-phase hybrid stepper motor |
| Vacuum compatibility | Below 1 × 10⁻¹⁰ mbar |
| Holding torque | 55 mNm |
| Detent torque | 6 mNm |
| Step angle | 1.8° |
| Step-angle tolerance | ±5% |
| Current per phase | 1.0 A |
| Phase resistance | 5.0 Ω |
| Phase inductance | 2.8 mH |
| Rotor inertia | 14 gcm² |
| Mass | 145 g |
| Maximum axial force | 5 N |
| Maximum radial force | 9 N |
| Operating temperature | −65 to +190 °C |
| Bakeout temperature | 200 °C |
| Temperature sensor | Type K thermocouple |
| Lead length | 1.5 m |
| Lead termination | 1.5 mm crimp sockets |
| Standard bearings | Open stainless steel |
Motor Dimensions
| Dimension | Value | Detail |
|---|---|---|
| Frame width × height | 28 × 28 mm | NEMA 11 |
| Body length | 36 ±1 mm | As dimensioned in the drawing; excludes front shaft projection |
| Front shaft diameter | 5.00 mm h7 | Tolerance +0 / −0.012 mm |
| Front shaft projection | 20 ±1 mm | From front mounting face, as drawn |
| Mounting centres | 23 × 23 mm | Square pattern |
| Mounting threads | M2.5 | Use the extended mounting screws; do not adjust the factory assembly screws |
| Thread projection | 6.5 ±1.0 mm | As shown in the drawing |
| Front locating diameter | 21.90–22.00 mm | Locating feature projects 2.0 mm |
| Optional rear shaft | 9 ±1.0 mm | Option X; confirm the required shaft modification when ordering |
Product Order Codes
| Order code | Description | Price excl. VAT and transportation cost |
|---|---|---|
| D28.1 | 55 mNm UHV stepper motor | £841.00 |
| D28.1-C | D28.1, Cryogenic -196 °C to +190 °C | £934.00 |
| D28.1-P | D28.1 with PT100 temperature sensor in lieu of thermocouple | £900.00 |
| D28.1-R | D28.1, Gamma radiation hardened | £934.00 |
| D28.1-X | D28.1 with shaft modification | Contact us |
