Pneumatic And Hydraulic Equipment Page 233

B I M B A The kinetic energy developed by your application can be determined by using the equations noted below: KE = 0.5 * I * w 2 w = 1.20 * ( / t) LEGEND: KE = Kinetic energy (in./lb.) I = Moment of inertia (in.-lb./sec. 2) w = Rotational speed (radians/sec.) = Angle of rotation (radians) t = Time of rotation (sec.) W = Weight of load (lb.) g = Acceleration of gravity (386 in./sec. 2) Kinetic Energy Capacity A load connected to the shaft of a Pneu-Turn will produce kinetic energy as it is rotated. This kinetic energy must be absorbed by the Pneu-Turn or other stopping device. If the Pneu-Turn is to stop the load without external devices, then the application kinetic energy must not exceed the maximums noted in the table below. Maximum Allowable Kinetic Energy (in./lbs.) r I = W * r 2 g 4 Thin Disc (mounted on side through center) Figure 1 Below are examples of attachments, their geometry, and the equation to use to determine the Moment of Inertia. r I = W * r 2 g 2 Figure 2 Thin Disc (centered) a1 a2 b Thin Rectangular Plate (off-centered) Figure 4 I = W a1 * 4(a1) 2 + b 2 + W a2 * 4(a2) 2 + b 2 g 12 g 12 a1 I = W * (2(a1)) 2 g 12 Slender Rod (centered) Figure 6 a1 a2 I =W a1 * a1 2 + W a2 * a2 2 g 3 g 3 Slender Rod (off-centered) Figure 7 a1 b I = W * (2(a1)) 2 + b g 12 Thin Rectangular Plate (centered) Figure 5 a1 b I = W * (2(a1)) 2 g 12 Thin Rectangular Plate (centered and mounted on side) Figure 3 Without With Size Cushions 9/16" (006 / 014) 0.02 N/A 3/4" (017 / 033) 0.04 0.08 1-1/16" (037 /074) 0.07 0.88 1-1/2" (098 / 196) 0.41 7.80 2" (247 / 494) 1.60 13.00 PNEU-TURN ROTARY ACTUATOR-SPECIFICATIONS Bimba JHF Catalog [ Volume 7 ] (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com 233 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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