I was going to make the muzzle end stop adjustable but got lazy. My compressor is a little longer than I need for any gun so I place assorted wood blocks between the muzzle and the end stop to take up extra space.
Fully adjustable. Make the wooden block you need in minutes because guess what. My compressor also makes a pretty good drill press.
I'm laying out a spring compressor, but being a novice who hasn't been around many air rifles, a couple questions come to mine:1) What's the longest receiver/tube I should play to accommodate? (Only frame of reference is my one gun, a Hatsan 95 which is around 19")2) Similar question: What's the max stroke I can expect to come across?Thank you, Wise Ones!
Let me ask you this: Is there much of a variation to the length of the stroke required from one gun/brand to another?
Quote from: Phoebe on October 16, 2023, 09:02:46 PMLet me ask you this: Is there much of a variation to the length of the stroke required from one gun/brand to another?Gas rams require very short compression stroke, like 1/16" to 1/4"Spring guns may see 3" of preload..........
Quote from: Ronno6 on October 16, 2023, 09:06:32 PMQuote from: Phoebe on October 16, 2023, 09:02:46 PMLet me ask you this: Is there much of a variation to the length of the stroke required from one gun/brand to another?Gas rams require very short compression stroke, like 1/16" to 1/4"Spring guns may see 3" of preload..........Thanks! I was trying to wrangle an answer out of someone I figured it was just a couple inches or so best.
I upgrade the spring guides in many of my coil springers. The largest rifles, Hatsan Mod125/135s, have almost 3" spring preload. I buy mostly refurbished/used rifles unless they are similarly priced as new "Clearance/Closeout" specials. The almost 3" is with "used" springs so new unset coil springs will be longer. With that in mind I redesigned my last spring compressor using a cut 6" c-clamp from Harbor freight, some 2x4 lumber, and a few small scraps of plywood for reinforcement. VERY similar to some designs already posted. I make little accessory bushings for each rifles endcap to prevent damage to the caps and/or any safety levers. On the Hatsan rifles specifically I find it is MUCH EASIER to remove the barrel AFTER the spring pressure is relieved so I have made small adapters to allow springs to be removed/replaced with the barrel attached.Air/Gas springs need no more than 3/8" preload.If you have or plan to get a Magnum (coil) Springer like a Hatsan Mod125/135 I suggest you design the spring compressor with a MINIMUM of 4" travel.