Standard Travel (LSM & HLSM) Linear Shift Mechanism Series
Production-proven linear motion along the port axis (Z) for sample positioning and production applications. Comprehensive series offering true UHV performance with a vast range of flange sizes, strokes, actuation and encoder options.
- 2x flange parallelism compared with conventional designs
- 2x load-carrying capability compared with conventional units
- Smooth kinematic motion
- 10,000 cycle lifetime guarantee
- Demountable bellows assembly
- Bakeable to 250°C
The LSM is the most comprehensive series in the range, offering the largest number of flange, stroke and actuation options. All flanges within the series are supplied with tapped bolt holes as standard. Special variants with clear holes on the mounting flange can be provided for most sizes, these are labelled HLSM in the partcodes and specification tables.
|Flange Information||Bolt Holes|
|Model||Flange Code||Flange Size||Travelling Flange||Mounting Flange||Clear Bore (mm)||Maximum Bakeout|
(HLSM38 and HLSM64 are non-standard options)
|M6 Tapped||M6 Tapped*||38||250°C|
|64||DN64CF 114 mm
|M8 Tapped||M8 Tapped*||65||250°C|
|100||DN100CF 152 mm
|M8 Tapped||Clear Holes||102||250°C|
|150||DN150CF 203 mm
|M8 Tapped||Clear Holes||149||250°C|
* Clear bolt holes on mounting flange available (HLSM option).
Contact firstname.lastname@example.org or 1-412-387-9200 for the complete range of dimension drawings.
The series can be actuated via a manual handwheel, pneumatic cylinder, DC motor or stepper motor. Each LSM can also be fitted with a digital linear scale, offering visual position indication with 1 micron resolution.
|H||Manual||A manual handwheel provides the most basic method of actuation.|
|GH||Manual w/ geared handwheel||Large bore Linear Shift Mechanisms are fitted with a geared handwheel to provide sufficient mechanical advantage to overcome the additional thrust due to vacuum.|
|P||Pneumatic||Pneumatic actuators provide a simple solution to automated operation.|
|PS||Pneumatic||Pneumatic actuator with reed switches.|
|SD||DC Motorized||A 24V DC motor provides the motion and is mounted to the side of the LSM.|
|SADC||DC Motorized||A 24V DC motor side-mounted with controller and pre-wired switches.|
|SS||Stepper Motor Driven||A stepper motor provides the motion and is mounted to the side of the LSM.|
|UP||Wiring Upgrade||When purchasing A LSM for use with one of our controllers, an additional wiring upgrade is available. The upgrade includes a bakeable socket connector, mounted to the frame, to which the limit switches are pre-wired. In the case of stepper motor driven products, an extra home switch is also provided. The motor lead terminates with a connector for plug & play connection to the controller.|
Position Readout/Feedback Options
|ES||Engraved Shaft||Linear Shift Mechanisms can be fitted with a scale with 1mm increments for visual positioning.|
|DLA||Digital Linear Scale||Digital scale displays are fitted to Linear Shift Mechanisms via a kinematic mount ensuring precise and repeatable location, which is critical for accurate repositioning after bakeout. The scale features large, easy to read characters that can be switched between metric and imperial units. The readout has a resolution of 10 microns (0.01mm). Users can set the ‘Origin’ at any position of its stroke, from which it will provide a plus/minus scale in the units selected. The ‘Origin’ is retained in its memory until re-set by the user, even when switched off. A second temporary ‘Zero’ facility is offered to enable one-off measurements to take place, which resets to the ‘Origin’ setting when turned off.|
|EN||Linear Encoder||The linear encoder (EN) option is selected where position feedback of the Linear Shift Mechanism traveling flange is required for closed-loop control applications. The EN is a contactless high-speed linear magnetic encoder which features a compact sealed read head providing resolution of 10 microns. Designed for extreme environments, the EN can be interfaced to a number of analog devices such as a PLC or motor controller. The EN is attached to the LSM frame with a kinematic mount enabling it to be removed if bakeout is required.|