Here are some pics of the simple coaxial rest that i and my friend Marjan designed and built.
The basic idea behind the rest was that we would build three rests out of our own pocket fro the club to use as loaner rests for shooters that do not have quality rests of their own. So rest had to be simple and reasonably cheap. It was never meant to rival top of the range rests, but we ended up with something that is not that far of either and built at a fraction of the cost
Most parts are bar stock so just cut to length, most holes are mirrored so one template works for 2 plates, spherical bearings have flanges so do not need a machined hole to press fit them in so you could make most parts on a basic drill press. sliding plate use linear bearings so coaxial unit is a cassette that can be taken out as a unit.
Rest is pure counterweight design so friction plates are there to provide feel and take out any slop more than in function of keeping rest from creeping. to balance the rest i use 1 weight on the Short pole for sporter , a second weight on a longer pole for LV and second weight slid all the way forward for HV ,Rest can handle heavier f class rifles but would need heavier counter weight to balance the rifle.
First version actually had a wooden baseplate but we are now building a steel one to ad some heft. I took the rest with me to Rimfire and Airrifle European Championship and World Cup in Plzen in addition to my personal high $$$ rest to use as a spare in case of need but as it turned out rest became the primary and a 1000$ rest was used as a spare as my team mates really loved it as did any one who tried so after the competition it found new owners as i sold it to Philippines BR team member so i am now building a second and a third one with some mods and by the rest 5 we will most likely lower the side post as the rest has way too much elevation travel for BR
The basic idea behind the rest was that we would build three rests out of our own pocket fro the club to use as loaner rests for shooters that do not have quality rests of their own. So rest had to be simple and reasonably cheap. It was never meant to rival top of the range rests, but we ended up with something that is not that far of either and built at a fraction of the cost
Most parts are bar stock so just cut to length, most holes are mirrored so one template works for 2 plates, spherical bearings have flanges so do not need a machined hole to press fit them in so you could make most parts on a basic drill press. sliding plate use linear bearings so coaxial unit is a cassette that can be taken out as a unit.
Rest is pure counterweight design so friction plates are there to provide feel and take out any slop more than in function of keeping rest from creeping. to balance the rest i use 1 weight on the Short pole for sporter , a second weight on a longer pole for LV and second weight slid all the way forward for HV ,Rest can handle heavier f class rifles but would need heavier counter weight to balance the rifle.
First version actually had a wooden baseplate but we are now building a steel one to ad some heft. I took the rest with me to Rimfire and Airrifle European Championship and World Cup in Plzen in addition to my personal high $$$ rest to use as a spare in case of need but as it turned out rest became the primary and a 1000$ rest was used as a spare as my team mates really loved it as did any one who tried so after the competition it found new owners as i sold it to Philippines BR team member so i am now building a second and a third one with some mods and by the rest 5 we will most likely lower the side post as the rest has way too much elevation travel for BR
not to. And here we are probably talking 400-500$ for complete rests
