Standard_Parts_Catalogue

Page 671 | 2.3 Tensioning with Eccentric Cams and Wedge Clamps GN 918.2 GN 918.7 Clamping Bolts Steel Stainless Steel Downward Axial Clamping 1 d 1 2 Type 3 Clamping direction How to order (Steel) 1 2 3 GN918.2-50-SK-R 1 d 1 2 Type 3 Clamping direction How to order (Stainless steel) 1 2 3 GN918.7-40-GV-L Clamping bolts GN 918.2 / GN 918.7 have a circumferential wedge sur- face, allowing the rapid and safe clamping and releasing at a relatively large adjustable range and with high clamping force. Owing to the small pitch angle (wedge angle), the eccentric cam is self-arresting 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 clamping bolt 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. Clamping bolts have the advantage that they can be turned after relea- sing in the clamping zone. The use of GN 605 ball point screws with flattened ball is recommended in connection with the clamping bolts. → Page 1052 see also... • Technical Instructions → Page 669 Information • GN 918.2 Steel - - Eccentrical cam and washer case hardened - - Screw bolt nitrided Property class 8.8 - - Ball lever Blackened • GN 918.7 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 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