AMF Catalogue Hydraulic clamping systems Page 7
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important and interesting facts hydrauLiC paramEtErs, uNits aNd FOrmuLa symbOLs: Ef fective piston area a Stroke return spring the units used in this catalogue for physical quantities are in accordance with Stroke Din 1301. Symbol unit Description unit conversion F N Force Newton 1 N ≈ 0,1 kp 1 kN ≈ 100 kp p bar bar 1 bar =10 N/cm² ≈ 1 atm. = 10⁵ N/m² Pascal 1 Pa = 1 N/m² clamping Pressure p Flow Q force F Volume Pressure Pa tEChNiCaL EquatiONs: A cm² Effective piston area - 1 m² = 10⁴ cm² V cm³ Volume - 1 dm³ = 1000 cm³ = 1l (Liter) t s Time second Q l min clamping force: F (n) = 10 x a (cm 2) x p (bar) required operating pressure: p (bar) = oil volume per cylinder: V (cm ) = 0,1 x a (cm ) x stroke (mm) clamping time: t (s) = 1+ 3 0,1 x F (n) a (cm 2) - 2 a (cm 2) x stroke (mm) x n (no‘s of cyl.) Q (l/min.) x 167 CL ampiNg FOrCE OF bOLts: For hydraulic clamping, the fatigue strength of the bolts clamping bolts thread Pitch is considered to obtain a high number of strokes. the testing force or yield strength must only be utilized for NOmiNaL CyLiNdEr sizEs: the nominal cylinder sizes are intended to facilitate cylinder selection: these sizes correspond to the clamping force in kn, related to the ma ximum operating pressure in each case (usually 400 bar) and the Hydraulic cylinders nominal testing force for crosssection bolt grade 8.8 as low numbers of strokes. ef fective piston area. Oil-flow rate 1 l = 16,67 cm³ s min Permissible load for continuous operation [mm] [mm 2] [kn] [kn] M 6 1,00 20,1 11,6 4,3 M 8 1,25 36,6 21,2 8,0 M 10 1,50 58,0 33,7 12,5 M 12 1,75 84,3 48,9 18,3 M 14 2,00 115,0 66,7 25,0 M 16 2,00 157,0 91,0 34,0 M 18 2,50 192,0 115,0 43,0 55,0 M 20 2,50 245,0 147,0 M 24 3,00 253,0 212,0 79,5 M 27 3,00 459,0 275,0 103,0 M 30 3,50 561,0 337,0 126,0 nominal cylinder size 2,0 2,4 4,4 5,0 5,9 6,6 8,0 10,1 12,0 14,0 17,5 17,8 20,0 32,0 39,9 50,0 63,0 70,0 78,0 94,0 125,0 [cm 2] 8,0 9,0 12,5 12,0 14,7 15,5 16,0 19,0 20,0 22,0 25,0 25,0 25,0 32,0 38,0 40,0 45,0 48,0 50,0 55,0 63,0 0,5 0,7 1,3 1,1 1,7 1,9 2,0 2,9 3,1 4,0 5,0 5,1 4,9 8,0 11,4 12,5 15,9 18,0 19,6 23,7 31,1 2 5 8 12 20 32 50 70 125 clamping force F en kn Piston dia. Piston area [mm] nominal cylinder size 100 bar 0,50 0,68 1,25 1,10 1,70 1,90 2,00 2,88 3,00 4,00 5,00 5,08 5,00 8,00 11,4 12,5 15,9 18,0 19,6 23,7 31,1 250 bar 1,25 1,70 3,10 2,80 4,20 4,70 5,00 7,20 7,50 10,0 12,7 12,7 12,5 20,0 28,5 31,0 39,1 45,0 49,0 59,2 78,0 350 bar 1,75 2,40 4,40 3,80 5,90 6,60 7,00 10,1 10,9 14,0 17,5 17,8 17,2 28,0 39,9 43,8 55,6 63,0 68,6 83,0 108,8 400 bar 2,0 4,4 8,0 12,0 20,0 32,0 50,0 63,6 72,0 78,4 94,8 124,0 500 bar 2,5 5,5 10,0 15,0 24,5 40,0 62,5 79,5 90,0 98,0 118,5 155,5 Subject to technical alterations. ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de Hydraulic clamping systems 7
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