AMF Catalogue Hydraulic clamping systems Page 45
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hollow rod Cylinder No. 6920G Hollow Rod Cylinder with internal thread single acting, spring return, max. operating pressure 400 bar. CAD Article no. push-pull force at 100 bar [kN] push-pull force at 400 bar [kN] Stroke H Vol. effective piston area [mm] [cm³] [cm²] [N] [g] 65318 6920G-20 5,0 20 8 4 4,9 200 1000 63032 6920G-32 8,0 32 10 8 8,0 350 1750 65334 6920G-50 12,5 50 12 15 12,8 540 1700 63073 6920G-80 20,0 80 15 30 20,0 750 3900 65359 6920G-125 32,0 125 20 64 32,8 1120 6400 Order no. Spring force min. Weight Design: Cylinder barrel from steel, burnished. Piston and piston rod case hardened and ground. Built-in return spring. Built-in sintered bronze filter. 2 wipers and vent screw. Oil supply via threaded port. Application: Particularly suitable for retrofitting existing fixtures for hydraulic actuation. When workpieces are clamped onto a machine tool table, the hollow rod cylinder can be fitted over the clamp bolt instead of the nut. The hollow rod cylinders can be used for push or pull applications. Features: Completely sealed against contamination and chips by means of sinter metal breather and two wipers. Piston can be moved to its end stop. Oil connection at both ends, thus easy lining up in series. Note: Cylinder size 20 to 50 are designed for use in combination with tempered bolts, material grade 8.8. For size 80 and 125 bolts of material grade 12.9 must be used. For single acting cylinders there is risk of sucking in coolant during the return stroke. In this case the cylinders have to be protected against the direct effect of coolant. The built in sinter metal breather should be protected. Dimensions: dia. D dia. F Article no. Piston dia. [mm] A 65318 6920G-20 32 80 52 63032 6920G-32 40 90 65334 6920G-50 48 101 63073 6920G-80 60 65359 6920G-125 75 Order no. dia. M dia. N R dia. P 20 G1/8 27 M12x29 17 14,5 24 G1/8 30 M14x30 19 16,5 26 G1/8 35 M16x39 22 87,0 132,5 18,5 32 G1/4 38 M18x38 27 108,0 163,0 20,5 38 G1/4 49 M20x47 32 K L 40 56,0 90,0 12,5 60 44 60,5 101,5 70 50 71,5 113,0 115 80 60 149 100 75 Gx S depth Hollow rod cylinder no. 6920G-125 in powder welding system for clamping of U-profile panels. Subject to technical alterations. ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de Hydraulic clamping systems 45
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