Description Designed especially for general requirements Separate wiper seals optional Hardened segmental load bearing plates Balls made of rolling bearing steel Ball retainer and retaining rings made of PA 11 Technical data General technical data Ø d mm 12 16 20 25 30 40 amax m/s² 150 vmax m/s 3 m kg 0.013 0.02 0.031 0.057 0.096 0.17 FR 1) N 1.5 2 2.5 3 4 5 Breakaway force N 3 4.5 5 7 9 12 μ 2) 01 ... 04 Rows of balls 5 6 Shaft radial clearance h6/bore H7 µm + 32 0 + 33 - 1 + 36 0 + 42 - 1 Shaft radial clearance h6/bore K7 µm + 17 - 15 + 18 - 16 + 18 - 18 + 21 - 22 Operating conditions Permissible ambient temperature (min ... max) -10 °C ... +80 °C 1) Frictional drags generated by Linear Bushings with seals on both ends when not under radial load. This depends on speed and lubrication. 2) Friction coefficients of unsealed Linear Bushings when lubricated with oil. The friction coefficient is lowest under heavy load, but can still be above the specified value even under a low load. Load capacities and load moments Ød mm 12 16 20 25 30 40 Cmin N 480 720 1020 1630 2390 3870 Cmax N 570 860 1080 1730 2530 4100 C0min N 420 620 870 1360 1960 3270 C0max N 620 910 1120 1750 2510 4180 The load ratings are based on a total travel of 100, 00 m. When based on 50 000 m, the values in the table need to be multiplied by 1.26. Legend Symbol Description Unit Ød Shaft diameters mm amax Maximum acceleration travel m/s2 Cmax Maximum dynamic load rating N Cmin Minimum dynamic load rating N C0max Maximum static load rating N C0min Minimum static load rating N FR Friction force N m Mass kg vmax Maximum permissible speed m/s μ Friction coefficient Effect of load direction on load rating The listed load ratings should be chosen depending on installation in minimum or maximum position and should be based on the calculations. If the load direction is clearly defined and the Linear Bushings can be installed in maximum position, the load ratings Cmax. (dynamic load rating) and C0 max (static load rating) can be used. If aligned installation is not possible or the load direction is not defined, the minimum load ratings must be used. Reduced load capacity with short stroke In case of a short stroke, the service life of the shaft is less than that of the segmental Linear Bushing. The load ratings C specified in the tables must therefore be multiplied by the factor f.s . Definition of dynamic load ratings Dimensions Dimensions Ød mm 12 16 20 25 30 40 D mm 20 25 30 37 44 56 C js14 mm 24 28 30 37 44 56 Project planning information Selection guide for operation under difficult conditions For constantly humid or damp conditions caused, for instance, by water-based coolants/lubricants, we recommend the stainless steel Linear Bushing with parts made of steel in accordance with ISO 683-17 / EN 10088. Life expectancy calculation Mounting Installation Install the segmental Linear Bushings using an arbor press (see General Installation Instructions). In order to prevent contamination in th
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