3dprinting a co-axial bench rest...

[JGSprecision]

Started this project last week, it's continuing to evolve...
It started out as a bunch of my old linear parts being used in a co-axial rest, now it's slowly becoming strictly GOO (PLAplus) and hardware.
First shots where great, the gun (7saum) traveled exactly where it was supposed to.
For the cheapest material and economical test prints, it was solider than expected.
The arca mount has 1.5in of recoil travel, swivel and tilt, course elevation, 0.5in X , 0.3 Y travel aiming stick, shot filled counter balance, adjustable stick friction, adjustable stick centering spring.

Goals are an affordable rifle test rig, attempting to show what the rifle is capable of.

Next features are foldable legs and replacing the elevation bearings with simple ball bearings in printed tracks. Maybe convert the lead screw to gear rack driven by a worm gear.

 

[JGSprecision]

Mounted to my portable L/R shooting bench.

 

[Chaotik]

Very nice! That's an ambitious project. I undertook a project to make a 4" top for the Lenzi rest for several of my friends who have been waiting over a year for the metal parts to ship from Italy. These are made from PLA and are currently used by a couple of Benchrest shooters successfully in competition.

 

[JGSprecision]

Very nice! That's an ambitious project. I undertook a project to make a 4" top for the Lenzi rest for several of my friends who have been waiting over a year for the metal parts to ship from Italy. These are made from PLA and are currently used by a couple of Benchrest shooters successfully in competition.
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I machine lots of stuff, my favorite color is 6061... But there's something satisfying about making squirted stuff functional lol.
Its done wonders for the reloading bench...

 

[LVLAaron]

Gridfinity! A man of true class

 

[ballisticdaddy]

That looks like a very well designed, printed and assembled piece!

 

[JGSprecision]

Well that was a huge re-design! Rack and pinion elevation driven by a worm gear box. Square drive shaft because why not.
More ball bearings everywhere. Elevation bearings are tune-able. The rest gets a bit lower now. I think it gets taller then I'd ever want. What's another 2.2kg of printer goo...

 

[JGSprecision]

Everything is really DRY. There will be a brake on the worm gear. So far everything works.

 

[JGSprecision]

Some more parts done.... so far I like it.
Developing a mcmaster parts list.

 

[urbanrifleman]

Incredible.

 

[LVLAaron]

Rizzem with your tism brother!

 

[JGSprecision]

Debating scaling it down for the 256mm cubed printers (bambu X1C comes to mind).
Time to finish assembly on this one.

 

[Chaotik]

Scaling it down to a 256 cubed printer would certainly increase the potential market, assuming you were going to distribute the CAD file or .stl.

 

[JGSprecision]

Scaling it down to a 256 cubed printer would certainly increase the potential market, assuming you were going to distribute the CAD file or .stl.

Its a for fun project so I'll probably post a cad file. Did get the latest version assembled...

 

[JGSprecision]

Trimmed the extra material out of the linear rails and shortened the legs to fit a 250mm cubed printer. Files coming soon.

 

[JGSprecision]

 

[LVLAaron]

Heck of a contraption you got there!

 

[mdftr]

This looks awesome - i'm looking forward to building it!

 

[tdogg]

Nice, I also would like to build it!

Cheers,
Toby

 

[JGSprecision]

2kg of your choice of PLA or PETG