# D42.2 UHV Stepper Motor

> 1.8°, two phase hybrid stepper motors (1 x 10-10 mBar)

Canonical product page: [https://arunmicro.com/products/D42-2_UHV_Compatible_Stepper_Motor/](https://arunmicro.com/products/D42-2_UHV_Compatible_Stepper_Motor/)

450 mNm, NEMA 17

## Product details

- Product code: `d42.2`
- Category: [UHV Stepper Motors](https://arunmicro.com/products/category/motors/)
- Made in the UK
- UK-based support

## Order codes

| Order code | Description | Price |
| --- | --- | --- |
| D42.2 | 450 mNm UHV stepper motor | £873.00 |
| D42.2-C | D42.2, Cryogenic -196 °C to +190 °C | £966.00 |
| D42.2-H | D42.2, Dry lubricated hybrid ceramic bearings | £966.00 |
| D42.2-P | D42.2 with PT100 temperature sensor in lieu of thermocouple | £932.00 |
| D42.2-R | D42.2, Gamma radiation hardened | £966.00 |
| D42.2-X | D42.2 with shaft modification | Price on request. Contact AML for a quotation. |

## Overview

- 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

## Documentation and downloads

- [Application of UHV Stepper Motors](https://arunmicro.com/documentation/APN_Application_Notes_for_UHV_Stepper_Motors.pdf)
- [Axial & Radial Loads](https://bookstack.vps-da8d40f3.arunmicro.com/books/axial-and-radial-loads-on-aml-stepper-motor-bearings)
- [Datasheet](https://arunmicro.com/documentation/Datasheet_AML_UHV_Compatible_Stepper_Motor.pdf)
- [Magnetic Leakage Fields](https://arunmicro.com/documentation/APN_Magnetic_Leakage_Fields.pdf)
- [Material Content](https://arunmicro.com/documentation/APN_Material_Content_of_AML_UHV_Stepper_Motors.pdf)
- [Operating Instructions](https://bookstack.vps-da8d40f3.arunmicro.com/books/d-series-uhv-stepper-motor-user-manual)
- [RoHS](https://arunmicro.com/documentation/CE_AML_UHV_Stepper_Motors.pdf)
- [Vacuum Performance](https://arunmicro.com/documentation/APN_Vacuum_Performance_of_AML_UHV_Stepper_Motors.pdf)
- [CAD Models (.STEP)](https://arunmicro.com/downloads/CAD_VCSM.zip)

## Related products

- [D42.1 UHV Stepper Motor](https://arunmicro.com/products/D42-1_UHV_Compatible_Stepper_Motor/): 250 mNm, NEMA 17
- [D42.3 UHV Stepper Motor](https://arunmicro.com/products/D42-3_UHV_Compatible_Stepper_Motor/): 550 mNm, NEMA 17
- [SMD4 Stepper Motor Drive](https://arunmicro.com/products/smd4-stepper-motor-drive/): Stepper motor drive optimised for use with AML UHV-compatible motors. Features advanced connectivity with USB, Ethernet and RS232/485 interfaces. Optional encoder module for incremental and absolute encoders
- [SMD3 Stepper Motor Drive](https://arunmicro.com/products/smd3-stepper-motor-drive/): Stepper motor drive optimised for use with AML UHV-compatible motors. Four operating modes including USB remote from a host PC and opto-isolated step and direction inputs. Continuous monitoring of motor temperature is provided with automatic shutdown to prevent motor damage.
- [UHV Stepper Motor Gearheads](https://arunmicro.com/products/stepper-motor-gearheads/): UHV planetary gearheads for use with AML stepper motors to increase step resolution and torque.
- [MLF18F](https://arunmicro.com/products/electrical-feedthrough/): MLF18F 18-way feedthrough on a DN40 CF flange (70 mm OD). Individual glass compression seals and bakeable to 250°C.
- [MLF18 UHV Connectors](https://arunmicro.com/products/vacuum-side-connector/): UHV, 18-way Vacuum-Side Connectors.
- [VCC7 UHV Connectors](https://arunmicro.com/products/vcc7-vacuum-side-connectors/): UHV, 7-Way Vacuum Compatible Connectors.