LM Guide Models for Special Environments Medium-to-Low Vacuum Model HSR-M1VV

Features

• Operable in various environments at pressures between atmospheric pressure and vacuum (10 ^-3 Pa)
• Capable of withstanding baking temperatures up to 200°C ¹
• Use of a dedicated labyrinth end seal for medium-to-low vacuums increases grease retention and allows extended use in a vacuum
• Use of grease designed for medium-to-low vacuums enables stable rolling resistance.

¹ If the baking temperature exceeds 100°C, multiply the basic load rating with the temperature coefficient.

Structure of the dedicated labyrinth end seal for medium-to-low vacuums

The dedicated labyrinth end seal for medium-to-low vacuums forms a multi-stage space as shown in the figure below to minimize the pressure difference between adjacent stages. This minimizes the out-flow velocity of the oil inside the LM block. In addition, the seal will not affect the rolling resistance since it does not contact the LM rail.

Achievable vacuum level

The medium-to-low vacuum LM Guide demonstrates excellent achievable vacuum levels.
Test temperature: 25°C (±5°C)

	HSR15M1RVV	HSR15R (for reference)
Grease	Grease for medium- to-low vacuum	AFB-LF Grease
Seal	Labyrinth end seal dedicated for medi- um-to-low vacuum	None
End plate	Stainless steel	Resin

Rolling resistance

The grease used in the medium-to-low vacuum LM Guide has a smaller rolling resistance than conventional fluorine grease and ensures stable rolling motion.
Specimen: HSR15M1RVV
Temperature: 25°C (±5°C)
Pressure: atmospheric pressure

If a large moment is applied to a system consisting of one LM rail or one LM block per shaft, the labyrinth end seal may contact the LM rail, which could affect the system’s motion. If a moment will be applied, it is recommended to use two rails with two LM blocks per rail. Contact THK for details.