Pneumatic And Hydraulic Equipment Page 1353

E N G I N E R I N G Holding Force Created By Vacuum Cups Formula: Vacuum in inches Diameter of Sucker of mercury 1" 1-1/2" 2" 3" 4" 5" 5 1.9 lbs. 4.4 7.8 17.7 31.4 48 lbs. 10 3.8 lbs. 8.7 15.4 24.6 62 96 lbs. 15 5.8 lbs. 13.1 23.3 52.2 93 145 lbs. 20 7.6 lbs. 17.3 30.8 69 123 192 lbs. 25 9.6 lbs. 21.8 38.6 87 154 241 lbs. Lbs. = Area (In. 2 ) x Degree of Vac. (" Hg) 2 To Find Angles and Sides of Oblique Angle Triangles Oblique Angle Triangle To Find Known Formulas C A, B 180 - (A + B) a x Sin B b a, B, A Sin A a x Sin C c a, A, C Sin A a x Sin C Tan A a, C, b b - (a x Cos C) B A, C 180 - (A + C) b x Sin A Sin B b, A, a a A B, C 180 - (B + C) b 2 + c 2 - a 2 Cos A a, b, c 2bc c x Sin A Sin C c, A, a a a x Cosec C - Cot C Cot B a, C, b b c b, C, B b x Sin C x Cosec B Thrust Exerted by a Cylinder Working at an Angle Cylinder thrust, F, is horizontal in this figure. Only that vector force, T, which is at right angles to the lever axis is effective for turning the lever. The value of T varies with the acute angle "A" between cylinder and lever axes. To calculate T, multiply cylinder thrust times the power factor taken from table below. Example: A 3.25-inch bore cylinder working 1000 p.s.i. gauge pressure will develop an 8300 lb. thrust (8.294 in. area x 1000). Effective thrust when working at a 65 angle is: 8300 x 0.906 = 7519.8. Power Factor Table ANGLE A PWR. FACTOR ANGLE A PWR. FACTOR DEGREES (SIN A) DEGREES (SIN A) 5 0.087 50 0.766 10 0.174 55 0.819 15 0.259 60 0.867 20 0.342 65 0.906 25 0.423 70 0.940 30 0.500 75 0.966 35 0.573 80 0.985 40 0.643 85 0.996 45 0.707 90 1.000 We offer 24-hour emergency service. Formulas JHF Catalog [ Volume 7 ] (314) 427-0600 800-444-0522 (FAX) 314-427-3502 www. j hf.com 1353 Prices Subject to Change Without Notice John Henry Foster pneumatic and hydraulic equipment

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