Standard_Parts_Catalogue

Page 975 | 3.1 Indexing, Locking, Blocking with Pins and Ball-Shaped Elements 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 GN 722.1 Spring Latches Steel / Stainless Steel for Welding With spring latches GN 722.1, the plunger pin is retracted over the curve of the guide by a 180° turn of the latch. The notch at the upper end of the curve causes the latch to be held in place if the plunger pin needs to be kept temporarily from protruding. The ST version is designed for applications in steel construction, whereas the A4 stainless steel version is suitable for use in particularly aggressive environments. The dimensional tolerances between plunger pin and guide are selected so that the functional reliability is guaranteed even after welding, applying a corrosion protection layer or in case of contamination. For fastening by welding, the unmounted type AU is particularly recom- mended to avoid changes to the microstructure of the material due to heating of the spring and plunger pin. In this case, the indexing plunger is assembled only after the surface treatment of the welded guide. see also... • List of Cam Action Indexing Plunger Types → Page 958 ff. • Positioning Bushings GN 412.2 / GN 412.4 → Page 954 Information • Guide Steel precision casting ST Blackened, weldable - - Latch Steel precision casting Zinc plated, blue passivated - - Plunger pin Steel, zinc plated, blue passivated - - Pressure spring Stainless steel AISI 316Ti • Guide / Latch Stainless steel precision casting A4 Weldable, AISI 316 - - Plunger pin Stainless steel AISI 316 - - Pressure spring Stainless steel AISI 316Ti • Countersunk screw - - Steel, zinc plated (for ST) - - Stainless steel A4 (for A4) • Load Rating Information → Page 2132 • Stainless Steel Characteristics → Page 2166 • RoHS Specification 4 1 2 d Pin  −0,05 −0,25 Bore  +0,1 +0,3 s l 1 ≈ l 2 l 3 l 4 A/F Type AU Spring load in N ≈ Initial End  8 20 54 14 35 37 2,5 15  50 10 20 54 14 35 37 2,5 15  50 12 20 54 14 35 37 2,5 15  50 14 20 54 14 35 37 2,5 15  50 16 30 83 20 54 55 4 30 110 20 30 83 20 54 55 4 30 110 3 Type A Latch riveted, not removable AU Latch screwed, removable 1 d 2 s 3 Type 4 Material How to order 1 2 3 4 GN722.1-16-30-AU-ST