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Dual Shaft Sample Transporter with Rotation Stop

Product code: RMDG40(RS)-XXXX-YYYY

The RMDG40(RS) is an all metal sealed, linear-rotary feedthrough with independent rotation of the inner as well as the outer shaft with rotation stop option. This option limits the rotational movement of the rear magnet and thereby prevents mounted mechanical elements like pincer grips from being overloaded and damaged.
The main purpose of the RMDG40(RS) is to transport samples between UHV-chambers. The independent rotary motion of each shaft enhances operation of pincer grips by being able to drive and also rotate them.
Two sets of rare earth magnets on the air- and vacuumside provide the necessary force to ensure a rigid coupling from the handle to the shaft. All ball bearings are DicroniteTM (W-disulfide) dry lube coated. On request, the RMDG can be built with SiC ceramic hybrid ball bearings.

Order code standard length
  • 300mm travel: RMDG40(RS)-0300-0030
  • 500mm travel: RMDG40(RS)-0500-0030
  • 750mm travel: RMDG40(RS)-0750-0030
  • 1000mm travel: RMDG40(RS)-1000-0030

Order code customized version:
XXXX: linear travel in millimeters
YYYY: retracted length, flange face to end of shaft in millimeters (min. 45mm)
Options and accessories:


Specifications: Dual Shaft Sample Transporter with Rotation Stop

linear travel X >= 0mm AND <= 1250mm; standard 0mm
retracted length Y >= 45mm AND <= 200mm; standard 50mm

  • linear travel: 300mm, 500mm, 750mm, 1000mm
  • linear force: ~70N
  • torque: ~5Nm
  • excentricity deviation at 250mm: ~ 0.75mm
  • excentricity deviation at 500mm: ~ 1.00mm
  • excentricity deviation at 750mm: ~ 1.75mm
  • excentricity deviation at 1000mm: ~ 2.00mm
  • bakeout temperature: 200 °C max.
  • pressure range 1E-11mbar to 1000mbar
  • fully UHV compatible materials

download drawing (pdf)

download manual (pdf)

Possibly an end-user certificate (EUC) is required from purchaser.
Export licence from the State Secretariat for Economic Affairs (SECO) or Swiss Federal Office of Energy (SFOE) may be required

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