I'm taking some machining classes at the local vo-tech college and I need a new project. I was looking at the Yugo grenade launching spigots and thought that would be a fun little thing to build, but I can't find any dimensions on the internet. If anybody has one and a set of calipers, could you pull some dimensions off of it for me? In return, I'll make a print using the dimensions so anybody that finds the print online and has a lathe can turn one out.
OK, here goes. Using an unissued Yugo spigot, starting at the rifle muzzle end and progressing to the spigot muzzle. D = diameter in inches, L = length of that diameter
D 0.725 L 0.420
radius cut to next diameter, about L 0.070
D 0.862 L 0.425, with a 0.070 deep plunge cut in the center 0.080 wide for the spring clip.
straight taper, L 0.265 to next diameter
D 0.596 L 2.535, centered knurling of L 1.445
straight taper, L 0.100 to next diameter.
D 0.862 L 1.760, with 4 evenly spaced plunge cuts with sharply sloped but not vertical sides 0.102 deep 0.160 wide at bottom and 0.195 at the top
45 degree taper to the spigot muzzle, about L 0.060
Spigot muzzle end D 0.785 outer D 0.570 inner, which then tapers at what eyeballs at a 60 degree taper to the internal spigot bore, D 0.318
Standard AK LH thread for L 0.500 at the rifle muzzle end.
OAL of 5.540 inches
HTH, let me know if clarification is needed on these measurements.
sjohnson, that's perfect, very much appreciated. I need a new processor for my computer before I can install AutoCAD 2010, but after I get that sorted out I'll make a drawing of the spigot and post it on here. I'll also post pictures of spigot when I'm done. Thanks again pal!