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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.

Features

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.

Specification Table

	Flange Information		Bolt Holes
Model	Flange Code	Flange Size	Travelling Flange	Mounting Flange	Clear Bore (mm)	Maximum Bakeout
LSM (HLSM38 and HLSM64 are non-standard options)	38	DN38CF 70mm (2.75" OD)	M6 Tapped	M6 Tapped*	38	250°C
	64	DN64CF 114 mm (4.5" OD)	M8 Tapped	M8 Tapped*	65	250°C
	100	DN100CF 152 mm (6" OD)	M8 Tapped	Clear Holes	102	250°C
	150	DN150CF 203 mm (8" OD)	M8 Tapped	Clear Holes	149	250°C

* Clear bolt holes on mounting flange available (HLSM option).

Actuation Options

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.

Manual

Pneumatic

Motor

Code	Actuation Method	Description
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.

Motorization

Code	Actuation Method	Description
SD	DC Motorized	A 24V DC motor provides the motion and is mounted to the side of the LSM. No motor controller is provided.
SADC	DC Motorized	A 24V DC motor side-mounted with pre-wired switches and integrated "SADC" handheld controller.
SS	Stepper Motor Driven	A stepper motor provides the motion and is mounted to the side of the LSM, motor is provided with flying leads only (controller option provided separately upon request).
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 direct plug & play connection to the MSMC controller.

Position Readout/Feedback Options

Code	Item	Description
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.

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Ordering Table

Flange Size	Actuation	Clear Bore	Stroke Length	Scale	Wiring	Part Number	Price	In Stock	Add To Cart
Flange Size	Actuation	Clear Bore	Stroke Length	Scale	Wiring	Part Number	Price	In Stock	Add To Cart
DN63CF (4.50" OD)	Manual	64mm	100mm	-	-	HLSM64-100-H	P.O.R.
DN38CF (2.75" OD)	Manual	38mm	100mm	-	-	LSM38-100-H	P.O.R.
DN38CF (2.75" OD)	Manual	38mm	150mm	-	-	LSM38-150-H	P.O.R.
DN38CF (2.75" OD)	Manual	38mm	25mm	-	-	LSM38-25-H	P.O.R.
DN38CF (2.75" OD)	24VDC Motor	38mm	250mm	Etched Scale	Upgraded	LSM38-250-SD-UP	P.O.R.
DN38CF (2.75" OD)	Manual	38mm	50mm	-	-	LSM38-50-H	P.O.R.
DN63CF (4.50" OD)	Manual	64mm	25mm	-	-	LSM64-25-H	P.O.R.
DN63CF (4.50" OD)	Pneumatic	64mm	50mm	-	-	LSM64-50-PS	P.O.R.