Standard_Parts_Catalogue

Page 668 | 2.3 Tensioning with Eccentric Cams and Wedge Clamps GN 918 GN 918.5 Eccentrical Cams Steel Stainless Steel Radial Clamping 1 d 1 2 Type 3 Clamping direction How to order (Steel) 1 2 3 GN918-40-SK-L 1 d 1 2 Type 3 Clamping direction How to order (Stainless steel) 1 2 3 GN918.5-50-KV-R 2 Type KV With ball lever, angular (serration) GV With ball lever, straight (serration) SK With hexagon 3 Clamping direction R By clockwise rotation (drawn version) L By anti-clockwise rotation Eccentrical cams GN 918 / GN 918.5 allow the rapid and safe clamping and releasing at a relatively large adjustable range and with high clam- ping force. The cam not only has the advantage that the clamping effect is of the same magnitude over the whole of the clamping surface (i.e. in every angular position), but also that it is self-arresting in every position. The ball levers of types KV and GV feature a form-locking connection with the eccentrical cam by means of a serrated ratchet. During installation, this allows the lever to be fixed in a clamped position that is conveniently oriented with respect to the eccentrical cam. Screw bolt and washer (see technical instructions) are matched to en- sure that the eccentric cam can be easily turned after tightening. Using a washer requires no special requirements in terms of the threaded hole design. This means it can also be mounted on tables using T-grooves. see also... • Double Cam Levers GN 917 → Page 675 • Clamping Bolts GN 918.2 → Page 671 • Hubs with Eccentrical Cam GN 919 → Page 674 Information • GN 918 Steel - - Eccentrical cam and washer Case hardened - - Screw bolt nitrided Property class 8.8 - - Ball lever Blackened • GN 918.5 Stainless steel - - Eccentrical cam AISI 303 Chemically nickel plated - - Screw bolt and washer AISI 630 Tempered - - Ball lever AISI 303 Matte shot-blasted This information applies to both standards: • Ball knob DIN 319 Plastic Duroplast Black, shiny finish • Strength Values of Screws → Page 2152 • Stainless Steel Characteristics → Page 2166 • RoHS Specification 1 d 1 −0,5 d 2 d 3 d 4 h 1 h 2 h 3 h 4 ≈ h 5 l 1 l 2 ≈ A/F 40 M  8 24 25 10 31   21 55 31  8 100 15 50 M 10 28 30 12 34,5 24 62 36 11 116 19