AMF Catalogue Hydraulic clamping systems Page 182
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toggle joint clamp, hydraulic No. 6960C Toggle joint clamp, hydraulic double acting, max. operating pressure 250 bar. CAD Piston area A1 [cm²] Piston ringsurface A2 [cm²] Oil capacity forward [cm²] Oil capacity backward [cm²] Weight [bar] Cylinder stroke [mm] 250 80 3,14 2,0 25 15 5400 250 90 4,90 2,9 44 26 9600 250 120 8,00 4,9 96 59 18900 Article no. Clamping force* F1=F3 [kN] Clamping force* F2=F5 [kN] Clamping force* F5 [kN] p max. pD max. ** [bar] 66647 6960C-4 6 9 3 100 66654 6960C-6 12 18 5 100 66662 6960C-8 18 27 8 100 Order no. [g] * at p max. or pD max. ** pD = pressure during differential switching Design: Hardened steel, burnished, with hydraulic cylinder mounted ready for connection to standard double circuit (see circuit Fig. 1) or differential circuit (see circuit Fig. 2). Oil supply via threaded port. Application: The clamp is particularly suitable for use in transfer and special-purpose machines. Any thrust pieces can be attached to the sturdy holding arm. With the differential circuit (see Fig. 2 below) the differential piston area A2 of the cylinder is directly connected to P of the pressure generator, while the full piston area is connected by a 3/2-way seat valve. Features: The clamp, of machine quality, is maintenance-free thanks to its tempered and ground shafts which run in Teflon bearings. As a result of the hydraulic cylinder operation the possible clamping force is the same as the permissible holding force. The large aperture enables unhindered workpiece handling. Note: Please urgently observe the maximum pressure values in the table above. Dimensions: Article no. Piston dia. [mm] Piston rod dia. [mm] A B C dia. D E F G H K L 66647 6960C-4 20 12 15 122 52 11 54 20 70 57 10,0 66654 6960C-6 25 16 20 147 55 11 60 21 83 61 11,0 66662 6960C-8 32 20 30 196 80 13 95 22 111 86 12,5 Order no. M N dia. O P R S T 77,0 90 109 6,2 65 G1/4 38 85,0 105 129 8,2 81 G1/4 41 112,5 136 176 13,2 94 G1/4 46 U V W X Y Z 30 8 27 308,0 415,0 47,0 197 40 12 26 353,0 466,5 52,5 216 60 18 40 423,5 576,0 69,5 309 Hydraulic diagrams: Switching position a = clamp Switching position b = unclamp fig. 1 182 Hydraulic clamping systems Switching position 0 = clamp with differential switching Switching position a = unclamp fig. 2 Subject to technical alterations. ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de
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