Miniature Linear Guides in stock

TRW series mini linear guides are suitable for small automation equipment, widened type (rail width 14mm-30mm). TRW series miniature linear guides are small in size, light in weight, precise in positioning, low in noise, smooth in operation, simple to install, Widened rail design for maximum torque load capacity for single-axis use. TRW miniature linear guideways are Suitable for miniaturized equipment. ModelHH1NW1W2W3L1L2L3L4MxdH3Weight TRW7C91.95.52519331.21021-M3x31.820g TRW7H91.95.525193411930.8-M3x31.829g TRW9C122.9630214.539.31227.5-M3x32.440g TRW9H122.9630233.550.72438.5-M3x32.457g TRW12C143840286441531-M3x3.53.276g TRW12H143840286592846.3-M3x3.53.2111g TRW15C164960457.555203960M4x4.53.2140g TRW15H164960457.574.53558.379M4x4.53.2204g Data unit is mm Fluid lubrication results in a full-film or a boundary condition lubrication mode. A properly designed bearing system reduces friction by eliminating surface-to-surface contact between the journal and bearing through fluid dynamic effects. Fluid bearings can be hydrostatically or hydrodynamically lubricated. Hydrostatically lubricated bearings are lubricated by an external pump that maintains a static amount of pressure. In a hydrodynamic bearing the pressure in the oil film is maintained by the rotation of the journal. Hydrostatic bearings enter a hydrodynamic state when the journal is rotating.[11] Hydrostatic bearings usually use oil, while hydrodynamic bearings can use oil or grease, however bearings can be designed to use whatever fluid is available, and several pump designs use the pumped fluid as a lubricant.[33] Hydrodynamic bearings require greater care in design and operation than hydrostatic bearings. They are also more prone to initial wear because lubrication does not occur until there is rotation of the shaft. At low rotational speeds the lubrication may not attain complete separation between shaft and bushing. As a result, hydrodynamic bearings may be aided by secondary bearings that support the shaft during start and stop periods, protecting the fine tolerance machined surfaces of the journal bearing. On the other hand, hydrodynamic bearings are simpler to install and are less expensive.[citation needed] In the hydrodynamic state a lubrication "wedge" forms, which lifts the journal. The journal also slightly shifts horizontally in the direction of rotation. The location of the journal is measured by the attitude angle, which is the angle formed between the vertical and a line that crosses through the center of the journal and the center of the bearing, and the eccentricity ratio, which is the ratio of the distance of the centre of the journal from the centre of the bearing, to the overall radial clearance. The attitude angle and eccentricity ratio are dependent on the direction and speed of rotation and the load. In hydrostatic bearings the oil pressure also affects the eccentricity ratio. In electromagnetic equipment like motors, electromagnetic forces can counteract gravity loads, causing the journal to take up unusual positions.Miniature Linear Guides in stock website: