AMF Catalogue Hydraulic clamping systems Page 192
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bore clamp miNi, hydraulic, centric No. 6970CD Bore clamp MINI, hydraulic, centric Double-acting, max. operating pressure, see table, min. operating pressure 40 bar, lateral compensation per clamp ±0.2 mm. Article no. Order no. 556561 556562 556563 556564 6970CD-055 6970CD-06 6970CD-065 6970CD-07 Clamping Clamping Clamping rim dia. K force vertical force vertical height at 100 bar at 150 bar min. for Al-alloy [kN] [kN] [mm] L max. operating pressure [Nm] [bar] Md Weight [g] 2,76 - 5 5,2 - 5,9 8,5 3,7 100 273 2,76 4,1 5 6,0 - 6,7 8,5 3,7 150 274 2,76 4,1 5 6,6 - 7,2 8,5 3,7 150 274 2,76 4,1 5 7,0 - 7,7 8,5 3,7 150 275 Design: The actuating piston is double-acting. Body, clamping segments and tension bolts are made of nitrided tempered steel. Two-part clamping segments are externally interlocked. Four fastening screws are supplied as standard. Oil supply via oil channel in fixture body. Application: The hydraulic bore clamp is preferred for use on workpieces with complex external geometries that must be clamped for machining. After the clamping segments are applied to single-attachment clamping holes with low depth, a secure 5-sided processing can be performed without difficulty. Workpieces can be installed or removed automatically with handling devices. Features: Two clamping segments are spread in parallel, thus ensuring contact on the entire surface in every position of the tension bolt. This facilitates a high clamping power and ensures very low wear. Elastic rings hold the clamping segments together and seal them against entry of chips. Depending on the material, the external serration is pressed into the clamping hole with more or less force, thus permitting the required positive fit. The built-in plate springs achieve a max. pull-down stroke of approx. 0.2 mm during clamping. The integrated air connection L1 is used for cleaning the clamping area. This blow-off can also be used as a mount check for blind holes. The integrated air connection is used for cleaning the clamping control. With a suction volume flow meter, the volume flow is measured in the unclamped and clamped state of the workpiece. The difference is used for clamping control. The max. operating pressure should not exceed 6 bar here. The tension bolts are sword-shaped for better pre-positioning of the workpieces. The complete clamping-segment / tension bolt unit can be turned 90° so that an optimal force flow towards the workpiece centre can be set and locked. By setting the clamping elements, overloading of the clamping hole ( spreading force ) with low clamping rim is avoided. The drill clamp is also a contact surface for the workpiece. The workpiece contact surface is hard-metal coated (µ =0.3), which markedly increases the displacement force. Note: The lateral force when inserting the workpiece must not exceed the “lateral force” table value. The radial force must be observed. Please contact us if clamping hardened or cast workpieces. On request: Bore clamps for other hole diameters available upon request. Clamping hole in workpiece: CAD Subject to technical alterations. 192 Hydraulic clamping systems ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de
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