AMF Catalogue Hydraulic clamping systems Page 290
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Coupling elements No. 6989M Coupling mechanism, threaded design max. operating pressure [bar] Min. coupling force * (N) [A] Nominal bore [NW] M20x1,5 3 350 94 M20x1,5 3 350 94 Article no. for coupling under pressure for pressure-free coupling Thread 324491 6989M-05-001 ● - 324517 6989M-06-002 - 164970 6989M-10-001 ● ● 164996 6989M-20-002 - Order no. Md Q max. Weight [Nm] [l/min] [g] 15 8 40 15 8 40 - M24x1,5 5 500 98 20 12 72 ● M24x1,5 5 500 98 20 12 72 * at 0 bar; corresponds to the spring force complete including coupling nipple spring Design: Cylinder body and internal parts made of stainless steel. Seals from NBR, Viton, POM and PU. Application: Couplings are used for the leakage-free connection of hydraulic oil supplies. The coupling elements are installed in a body. The sealing between coupling mechanism and nipple is axial, and installed in the coupling mechanism. If the seal is worn, it can be replaced. The coupling mechanism must always be used in combination with a nipple of the same system. Depending on the version, the couplings can be connected and disconnected at the maximum working pressure. Features: For connection, the coupling mechanism and nipple must be axially aligned. The mounting housings of the two parts must be guided approx. 2-3 mm before contact with the axial sealing surfaces. The radial position tolerance must not be exceeded. The coupling force between coupling nipple and mechanism due to hydraulic pressure is given by the formula NW3: F [N] = 9,4 x p [bar], NW5: F [N] = 15,4 x p [bar] and must be applied in a force-locking or form-locking manner from the outside. The coupling mechanism must seal at the bottom of the hole in which it is installed. The mounting hole must be machined to the specified accuracy and surface finish. Note: The axial sealing surfaces on the front must be protected from soiling. Because the coupling elements have smooth, uninterrupted sealing surfaces, the danger of them being soiled is reduced, and the ease with which the user can clean them before the coupling process is increased. Good results can be achieved by washing them off and blowing clean with compressed air. Positioning tolerance in axial direction for all coupling elements: +0.5 mm. Positioning tolerance in radial direction for coupling units: +/- 0.3 mm. Permitted angle tolerance: +/- 1°. Diagrams: coupling force and flow resistance, see under 6989N. Installation tool for sealing ring: Size 05 and 06 order no. 551864 / size 10 and 20 order no. 551865 Screw-in tool: Size 05 and 06 order no. 552759 / Size 10 and 20 order no. 552760 On request: Other sizes available on request. Installation dimensions: alternatively Dimensions: Article no. dia. B 324491 6989M-05-001 18 21,5 10 - 31 29 - 13,0 11,2 28 5 7 15,5 2 x 2,6 324517 6989M-06-002 18 21,5 10 - 31 29 - 13,0 11,2 28 5 7 15,5 2 x 2,6 164970 6989M-10-001 22 21,5 10 23,5 31 29 12 12,5 11,2 28 5 7 18,5 4 x 2,8 164996 6989M-20-002 22 21,5 10 23,5 31 29 12 12,5 11,2 28 5 7 18,5 4 x 2,8 Order no. C D E* F G ØH * K dia. L M N dia. O P ØR * Countersunk bore ØHxE only for NW 5 detail X CAD Subject to technical alterations. 290 Hydraulic clamping systems ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de
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