VBMLSM Series Linear Feedthroughs

A robust bellows-based linear feedthrough which can be driven by handwheel or by stepper motor. The feedthrough has an 8mm diameter shaft and is available with DN16CF and DN40CF flanges and with travels from 25-150mm.

Key Features


  • DN16CF and DN40CF flange sizes (with through holes) only
  • Flanges are double-drilled to suit straddled or in-line flange mounting orientations
  • Travel options from 25-150 mm
  • Shaft diameter 8mm (last 20 mm turned down to 6mm diameter)
  • Thread pitch 2mm
  • External diameter 46.5 mm
  • M3 threaded hole, 10mm deep in the end of the shaft
  • Graduated scale on the external body for reproducible positioning
  • Positioning resolution 0.01 mm for manual version, 0.001mm with stepper motor
  • Flanges 316LN, bellows 316L stainless steel
  • Pressure range 1bar – 10-11mbar
  • Bakeable to 230ºC (with motor removed if motorised)
  • Other fully-retracted lengths and travels on request (please ask)
  • Shaft-end design modifications on request (please ask)
  • Motorised version supplied as standard with PKP 244 MD 15B-L stepper motor (Oriental): NEMA 17 / 0,4 Nm
  • Motorised version can optionally be fitted with a higher torque stepper motor PKP 268 MD 28B (Oriental) NEMA 23 / 2 Nm (please ask – part number MLS….S2 rather than MSLM….S2)
  • Motorised version can optionally be fitted with limit switches, linear encoder, linear potentiometer or motor encoder to provide feedback on manipulator position
Part No.Flange sizeTravel (mm)ActuatorIn vacuum length, A (mm)length B (mm) see drawingLength C (mm) see drawingWeight (kg)
VBMLSM16-25DN16CF25Manual100-1251820.7
VBMLSM16-25+
VBMLSM16-50DN16CF50Manual100-1502070.85
VBMLSM16-50+
VBMLSM16-75DN16CF75Manual100-1752501
VBMLSM16-75+
VBMLSM16-100DN16CF100Manual100-2003001.15
VBMLSM16-100+
VBMLSM16-125DN16CF125Manual100-2253571.3
VBMLSM16-125+
VBMLSM16-150DN16CF150Manual100-2504021.45
VBMLSM16-150+
VBMLSM40-25DN40CF25Manual100-1251821
VBMLSM40-25+
VBMLSM40-50DN40CF50Manual100-1502071.15
VBMLSM40-50+
VBMLSM40-75DN40CF75Manual100-1752501.3
VBMLSM40-75+
VBMLSM40-100DN40CF100Manual100-2003001.45
VBMLSM40-100+
VBMLSM40-125DN40CF125Manual100-2253571.6
VBMLSM40-125+
VBMLSM40-150DN40CF150Manual100-2504021.75
VBMLSM40-150+
VBMLSM16-25S2DN16CF25Motorised100-125222.51.35
VBMLSM16-25S2+
VBMLSM16-50S2DN16CF50Motorised100-150204.51.6
VBMLSM16-50S2+
VBMLSM16-75S2DN16CF75Motorised100-200247.51.85
VBMLSM16-75S2+
VBMLSM16-100S2DN16CF100Motorised100-2002982.1
VBMLSM16-100S2+
VBMLSM16-125S2DN16CF125Motorised100-225354.52.35
VBMLSM16-125S2+
VBMLSM16-150S2DN16CF150Motorised100-250399.52.6
VBMLSM16-150S2+
VBMLSM40-25S2DN40CF25Motorised100-125222.51.65
VBMLSM40-25S2+
VBMLSM40-50S2DN40CF50Motorised100-150204.51.9
VBMLSM40-50S2+
VBMLSM40-75S2DN40CF75Motorised100-175247.52.15
VBMLSM40-75S2+
VBMLSM40-125S2DN40CF125Motorised100-225354.52.65
VBMLSM40-125S2+
VBMLSM40-100S2DN40CF100Motorised100-2002982.4
VBMLSM40-100S2+
VBMLSM40-150S2DN40CF150Motorised100-250399.52.9
VBMLSM40-150S2+

VBMLSM16-25

Make Enquiry

VBMLSM16-50

Make Enquiry

VBMLSM16-75

Make Enquiry

VBMLSM16-100

Make Enquiry

VBMLSM16-125

Make Enquiry

VBMLSM16-150

Make Enquiry

VBMLSM40-25

Make Enquiry

VBMLSM40-50

Make Enquiry

VBMLSM40-75

Make Enquiry

VBMLSM40-100

Make Enquiry

VBMLSM40-125

Make Enquiry

VBMLSM40-150

Make Enquiry

VBMLSM16-25S2

Make Enquiry

VBMLSM16-50S2

Make Enquiry

VBMLSM16-75S2

Make Enquiry

VBMLSM16-100S2

Make Enquiry

VBMLSM16-125S2

Make Enquiry

VBMLSM16-150S2

Make Enquiry

VBMLSM40-25S2

Make Enquiry

VBMLSM40-50S2

Make Enquiry

VBMLSM40-75S2

Make Enquiry

VBMLSM40-125S2

Make Enquiry

VBMLSM40-100S2

Make Enquiry

VBMLSM40-150S2

Make Enquiry