296 TECHNICAL INFORMATION 2Features High accuracy needle rollers are arranged in four directions against the square shafts. Shafts/bushings are designed to be 1 ~ 6μm preloaded. Widely used in parts of semiconductor, liquid crystal manufacturing equipment and inspection device, lift/slide stages, robotic systems, press machines and transfer mechanism as the guide with high rigidity, straightness and high speed. Capable of torque loading without rotation due to square cross section with low yawing and pitching, maintaining smooth rotation and stable accuracy. 2Notes on handling · Anti-rust oil is applied to the products when they are shipped. Administer lubrication maintenance with high-pressure grease (AFC Grease by THK), etc. as needed. · When designing, position the bushing where the retainer does not fall out from the bushing at stroke ends. · As a preload is applied, assemble slowly without any prying when inserting retainers. (It may cause damages to the retainers as well as damages on the rolling surfaces). · Use covers, etc. if any foreign objects or dust may fall on the rolling surfaces. · Avoid using in high temperature environments, keep below 80°C. · Do not cold shrink fit the bushings and shafts. Residual austenite will transform into martensite and will expand I.D./O.D. of bushings and shafts, rendering them unusable. Retainer Made from one-piece casting of super engineering plastic. Shafts Shaft has four flats machined. Shaft length and end configurations are selectable. Bushing Body has four flat sides machined internally. Needle Rollers No clearance in any direction since shaft/bushing are 1 ~ 6μm preloaded. Basic Torque Rating Basic Load Rating Allowable Static Moment Load Point 1kg Displacement Measuring Point 2App. Example Lift Stage Lift Stage Swiveling Arm Suction Cup Slide Stage Inspection Camera 2Accuracy Standards Datum axis A is defined as a center axis of four flat rolling surfaces. Straightness of Bushings: ±5μm or Less A 1 0.05 A 1 0.05 A 0.05 A 1 0.05 A 2-PBE 3BUJOH 5BCMF D Basic Rated Torque Basic Load Rating "MMPXBCMF 4UBUJD .PNFOU CT Dynamic (N t m) CoT Static (N t m) $ %ZOBNJD L/ $P 4UBUJD L/ Mo(N t m) 6 12.3 21.0 3.4 5.0 10.6 10 48.7 84.4 6.8 10.0 23.0 12 91.3 162.9 11.9 17.4 76.4 16 115.7 212.0 11.9 17.4 83.6 D Deflection (L is max.) 6 6μm 10 2μm 12 2μm 16 1μm Needle Guide Overview
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