Description Lightweight precision housing (aluminum) Super Linear Bushings SH Compensate for misalignments of up to 30 ft Integrated wiper seals Secured with bolt Features Relubricatable Technical data General technical data Ø d mm 20 25 30 40 50 amax m/s² 150 vmax m/s 5 m kg 0.31 0.63 0.97 1.86 3.1 FR 1) N 2.5 3 4 5 6 Breakaway force N 5 7 9 12 15 Radial clearance Comes clamped to h5 shaft (lower limit) and set to zero clearance Operating conditions Permissible ambient temperature (min ... max) -20 °C ... +80 °C 1) Frictional drags generated by Linear Bushings with integrated wiper seals on two sides when not under radial load. The frictional drags depend on speed and lubrication. Load capacities and load moments Ød mm 20 25 30 40 50 C 1) N 3530 6190 8800 13500 22300 C0 1) N 2530 4530 7180 10400 16800 1) The load ratings apply for the main direction of loading. 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 C Dynamic load capacity N C0 Static load capacity N FR Friction force N m Mass kg vmax Maximum permissible speed m/s See "Technical data – Load direction factors" and the diagrams/characteristic curves section for exact values for the 4 main directions of loading. Effect of load direction on load rating a) Closed b) Open Main direction of loading Load direction factors The load ratings C and C0 apply for the load direction ρ = 0°. For all other load directions, the load ratings must be multiplied by the factors fr (dynamic load rating C) or fρ0 (static load rating C0). Load direction factor Super SH Shaft Load direction factor (dynamic load capacity) Ø d (mm) ⇩ ⇒⇐ ⇑ ⇩ ⇒⇐ ⇑ 20 - 25 1 0,79 1 1 0,79 0,52 30 - 60 1 0,86 1 1 0,86 0,59 Load direction factor (static load capacity) 20 - 25 1 0,68 1 1 0,68 0,50 30 - 60 1 0,83 1 1 0,83 0,55 Reduced load capacity with short stroke In case of short stroke, the service life of the shaft is less than that of the super Linear Bushing. The load ratings C specified in the tables must therefore be multiplied by the factor f.s . 1) fs = factor 2) s = movement path Reduced load capacity with high load The load rating is reduced under high load F. The dynamic load rating must be multiplied by the load factor f.F . 1) fF = load factor Definition of dynamic load ratings Diagrams/characteristic curves Load direction factors a) Closed b) Open Super Linear Bushings can be installed in any location. Choose a location that ensures that the main direction of loading is always ρ = 0°. Dimensions a) Lubricating hole sealed with plastic cap Dimensions Ød mm 20 25 30 40 50 D mm 32 40 47 62 75 A mm 60 78 87 108 132 E1 45 mm ±0.15 60 mm ±0.15 68 mm ±0.15 86 mm ±0.15 108 mm ±0.2 E2 32 mm ±0.15 40 mm ±0.15 45 mm ±0.15 58 mm ±0.15 50 mm ±0.2 E3 mm 50 64 72 90 108 E4 mm 15 17 20 25 85 H mm 25 30 35 45 50 Tolerance for H 1) µm + 8 - 16 H1 mm 50 60 70 90
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