Standard_Parts_Catalogue

Page 897 | 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 1 2 d 1 Pin  −0,05 −0,25 Bore  +0,1 +0,3 s d 2 d 3 l 1 ≈ l 2 l 3 l 4 A/F Spring load in N ≈ Initial End  8 20 36  7  70 14 35 52 2 15  50 10 20 36  7  70 14 35 52 2 15  50 12 20 36  7  70 14 35 52 2 15  50 14 20 36  7  70 14 35 52 2 15  50 16 30 50 10 103 20 54 78 2,5 30 110 20 30 50 10 103 20 54 78 2,5 30 110 With indexing plungers GN 722.4, the plunger pin is actuated via the pull ring. This is done either manually, with a cable or by means of an exten- ded pull rod with hook. 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 Indexing Plunger Types → Page 884 • Spring Latches GN 722.1 → Page 975 • Positioning Bushings GN 412.2 / GN 412.4 → Page 954 Information 1 d 1 2 s 3 Type 4 Material How to order 1 2 3 4 GN722.4-8-20-A-ST 3 Type A With pull ring, mounted AU With pull ring, unmounted • Guide Steel precision casting ST Blackened, weldable - - Pull ring Steel precision casting Zinc plated, blue passivated - - Plunger pin Steel, zinc plated, blue passivated - - Pressure spring Stainless steel AISI 316Ti • Guide / Pull ring Stainless steel precision casting A4 Weldable, AISI 316 - - Plunger pin Stainless steel AISI 316 - - Pressure spring Stainless steel AISI 316Ti • Grub screw DIN 915 - - Steel, zinc plated (for ST) - - Stainless steel (for A4) • Load Rating Information → Page 2132 • Stainless Steel Characteristics → Page 2166 • RoHS Specification 4 GN 722.4 Indexing Plungers Steel / Stainless Steel for Welding