Pneumatic And Hydraulic Equipment Page 874

Choice of cylinder is decided by: Permissible loads, forces and moments Performance of the pneumatic end cushions. The main factors here are the mass to be cushioned and the piston speed at start of cushioning (unless external cushioning is used, e. g. hydraulic shock absorbers). The adjacent table shows the maximum values for light, shock-free operation, which must not be exceeded even in dynamic operation. Load and moment data are based on speeds v 1.6 ft./sec. Loads, Forces and Moments Work out your expected moving mass and read off the maximum permissible speed at start of cushioning. Alternatively, take your desired speed and expected mass and find the cylinder size required. Please note that piston speed at start of cushioning is typically ca. 50% higher than the average speed, and that it is this higher speed which determines the choice of cylinder. If these maximum permissible values are exceeded, additional shock absorbers must be used. Please ask for info on the optional adaptable cushioning system. Cushioning Diagram To avoid excessive bending and oscillation of the cylinder, midsection supports are required dependent on specified stroke lengths and applied loads. The diagram shows the maximum possible unsupported length dependent on the load. Deformation of .02 in. maximum between supports is permissible. Mid-section supports are clamped on to the dovetail profile of the cylinder. They can also withstand axial forces. Mid-Section Supports Cylinder Theoretical effective max. Load Cushion Series Action Force Action Force F A L Length [mm ] at 87 PSI (lbs.) at 87 PSI (lbs.) M MS MV (lbs.) (in.) OSP-P16 27 18 35 4 27 .43 OSP-P25 66 56 132 13 26 67 .67 OSP-P32 108 94 265 26 44 101 .79 OSP-P40 169 144 532 53 70 168 1.1 OSP-P50 265 225 1017 88 132 270 1.2 OSP-P63 420 348 1770 106 212 371 1.3 OSP-P80 678 584 3136 212 424 539 1.5 M = F r. Bending moments are calculated from the centre of the linear actuator and F indicates actual force. Ft./Sec .22 .44 .66 1.1 2.2 4.4 6.6 11 22 220 2204 lbs 7.8 15.7 23.6 31 39 47 55 63 71 79 86 94 102 110 118 126 134 142 (inches) 16.4 13 9.8 6.6 3.3 1.6 1.3 .98 .66 .33 lbs 585 540 495 450 405 360 315 270 225 180 135 90 45 Distance k Load L max. Moments (inlbs) RODLESS PNEUMATIC CYLINDER - OSP SERIES Parker origa (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com JHF Catalog [ Volume 7 ] 874 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

Previous Page
Next Page