OILES Air Bearing

CUSTOMIZED PRODUCT

Realized zero friction coefficient, high velocity operation, and nanometer accuracy
OILES Air Bearing is a self-lub bearing with high rigidity, high measurement and high velocity. The unique porous sintered layer and back metal are composed in one unit. Features Realized extreme high accuracy control of positioning because of almost zero in the coefficient of friction and no stick slip High rigid bearing realized by optimum press owing to unique porous technique Back metal and sintered layer making solid construction realizes easy machining and low cost manufacturing
Performance of Bearing (radial bearing)
Performance of air bearing; bearing rigidity and load capacity are decided by bearing dimensions and flow quantity and setting of gap of a radius. High rigidity and accuracy type : gap of a radius, 7~12m Generalized type : gap of a radius, 10~15m High speed type : gap of a radius, 15~20m The following data as reference value in a experiment example of air supply gauge pressure 0.49MPa. A meaning of data term Open flow rate in the air --- Volumetric flow rate -------- (bearing flow rate) Bearing rigidity -------------- Air flow rate when the air supply in the opening condition that did not set an axis to a bearing. Flow rate when the air supply to a bearing set an axis. Flow rate change with a gap. The gap becomes small, bearing rigidity becomes high. As for high rigidity and accuracy type and high speed type indicate value at the time of a radius gap of 8m and 15m each. Load capacity Allowable load -------------- Critical load ------------------ An axis is dis placed by load, and axis and smallest gap of a bearing are load at the time of 5m. As for high rigidity and accuracy type and high speed type indicate value at the time of a radius gap of 8m and 15m each. Load when a bearing comes in contact with an axis. 50×70×L50 High rigidity and accuracy Type High speed Type Open flow rate in the air : 300NL/hr Open flow rate in the air : 1200NL/hr Bearing rigidity : 150N/m Bearing rigidity : 75N/m Allowable load : 420N Allowable load : 540N Bearing rigidity Load capacity Volumetric flow rate
Note of Handling
Fixing method of bearing When fix a bearing, must minimize transformation. Avoid fixation by Press-fitting. When it use particularly several bearings, the concentricity becomes important. Please choose the following fixed method adequately. Shrink fitting use with adhesive bonding --- Heat the housing and make hole dimensions of bearing fixation part big. Make a ring groove for bearing outer diameter and apply adhesives (ex : Lock tight) to groove and insert it in a housing. Cooling fit -------------------------------------- By small quantity spends dry ice in ethanol and the bearing soak in this, and bearing dimensions shrink and insert in a housing. O ring fixation --------------------------------- Insert in a housing in the state that in stalled an O ring in outer diameter of a bearing. Flange part fixation --------------------------- Fix to a housing in the case of a bearing with flange in a flange part. Bearing and axis 1 : 2 : 3 : Sintered porous lagers of a bearing is mode reasonable flow rate adjustment on. When it is less than supersonic wave washing 100Hz and do sintered porous layers, please avoid because flow rate can change. Give the end face of the axis R chamfering because the axis is often damaged surface of the bearing when it assemble. Axial surface roughness makes Re0.2 (1S) a standard. Axis materials, please use anticorrosion steel (SUS). And giving hard chromium plating is recommended. The ceramics, stone, hard alumite treatment materials as well can be applied. Don't use it as for the electrolytic-less nickel plating, not for suitable. Main material to use for the axis and housing, and coefficient of linear expansion. (/) Material Coefficient of linear expansion SUS304 1.72×~10-5 SUS420J2 1.08×~10-5 Aluminum (A5052-T5) 2.36×~10-5 Duralumin (A7075-T6) 2.36×~10-5 Material Coefficient of linear expansion Alumina ceramics 0.45×~10-5 Gabbro 0.80×~10-5 Copper alloy (bronze BC6) 1.90×~10-5 Carbon steel (S45C etc.) 1.07×~10-5 Air control 1 : 2 : 3 : Use clean air (a dry area, passed through 1/m following filters). Supply pressure is to secure the capacity of about two times of the consumption way quantity with 0.49Mpa (basic performance value) usually. When it sart after along-term stop, please use it after check drain and air pressure by all means, and confirming that it is normal. Others 1 : 2 : Garbage, rust, cutting powder can invade after assembling of the air plumbing, please use it after doing an air blow enough. The condition that grease or oil stick to the bearing surface and the axis isn't normal. Air supplies a bearing in an opening condition, and throw the oil out of the inside of porous lagers, and wipe it out with the solvent.
Products | Bearing Top