This is a good example of how a guide will look if you leave a rear centering stub:
http://www.airgunspares.com/store/pr...er-%26-Osprey/
This is a good example of how a guide will look if you leave a rear centering stub:
http://www.airgunspares.com/store/pr...er-%26-Osprey/
This is interesting , it doesn't really matter if your long bit is at the front or the rear, if its a thin walled guide the piston rod actually helps strengthen it if at the front , however you do it make sure both ends are located centrally and make them so they just contact when cocked , full support and no odd coil sticking proud when cocked .
I’m just a bit pissed off now , I received the delrin rod today and despite the listing being for 10mm & 12mm diameter, the 10mm as suggested is a bit too loose and the 12mm is actually 12.22mm, 0.12mm BIGGER than the ID of the spring....grrrr
There’s no mention on the site of the diameters being ‘nominal’ so it looks like a phone call on Monday
The company in question is HPC Gears of Chesterfield.
I’m not sure I’d be comfortable machining 0.22mm of the length of it ( 200mm ) on the lathe although I do have a live centre for the tail stock so it might be within my means.
I only need a piece 125mm long so unless they can provide me with another bit of exactly 12mm diameter it’ll mean a bit of careful work.
The 10mm piece is also over at 10.15mm but too loose
Norm
That extra material makes it possible to machine it to spec.
You might need to do some fine adjustments on the lathe to eliminate taper when you machine it to size.