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Old 01-14-2015, 10:45 PM   #1 (permalink)
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Cocker pump frame

I have been sitting on a custom pump frame design for a year or 2 but I have been putting it off because I was reluctant to spend the time and money making metal prototypes only to find out the ergonomics are not right. So over in the custom section Laxpro69 made a thread about making a custom frame. Well a little back and forth an I sent him my custom frame file and he was able to print it with his 3d printer.

The results of the printing was great but as I was afraid of the ergonomics were not there. It seams like the palm width is a bit too wide. Below is a render of the frame that was printed.



The results were good enough to start a project thread on it and try to make plans for an actual production run later this year.
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Old 01-14-2015, 10:54 PM   #2 (permalink)
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Are you planning on making internals also?
RTR or carter style slider?
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Old 01-14-2015, 11:20 PM   #3 (permalink)
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I was actually thinking more swing trigger rather than slider. They are easier to make and I have MUCH more experience with them.

Depending on the success I might try a slider design for mech cockers later but for now I think I'll take the low hanging fruit

As for the internals. I will probably make the triggers. As for the sears I will most likely farm them out to another machinist that is local to me. He has a water jet machine that can make short work of thin hard steel plate.
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Old 01-14-2015, 11:24 PM   #4 (permalink)
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I am not sure that a swing frame is such a low hanging fruit. Other than the Dye 1.5 finger frame and CCM there really aren't any options for swing frames, especially none so ergonomically inclined. I would think of it more as filling a niche, super comfy swing frame.
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Old 01-14-2015, 11:35 PM   #5 (permalink)
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Well that brings up another point I may end up doing something different with this product. Since this is a ergonomic type endeavor I can't really just use my opinion the final say so maybe once I am happy with the prototypes and I am ready to commit to metal I might look for some beta testers to get some input before starting a full run.
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Old 01-14-2015, 11:44 PM   #6 (permalink)
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One other quick question. I see 3 options for the bottom of the frame.

1. standard 10-32 mounting holes
2. Eclipse rail
3. Dovetail

I am actually partial to either 1 or 2. I don't really like integrated dovetails because you cant tighten them from the outside of the frame and there is nothing worse than a wobbly asa that you cant fix without a big headache.
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Old 01-14-2015, 11:47 PM   #7 (permalink)
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Standard is my vote.

Very interested, always on the hunt for good humpback frames for projects, maybe add a small snatch grip. If nothing else I think the longer frames with a snatch back tend o line up with the cuts of autocockers at least (not limiting to just that, but I anticipate thats your biggest market.
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Old 01-15-2015, 12:03 AM   #8 (permalink)
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Ya I kinda like the snatch grips on my CCM frames. That might be something I toy around with a little later. At this point though it would just be extra print volume so I think focus on the main ergonomic interface get that solid then if the snatch grip still makes sense it can easily be added.
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Old 01-15-2015, 12:48 AM   #9 (permalink)
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I also vote standard. Snatch grip eventually as well.

Edit: Are you thinking of doing an autotrigger cam/arm too?
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Old 01-21-2015, 10:20 PM   #10 (permalink)
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I also vote standard. Snatch grip eventually as well.

Edit: Are you thinking of doing an autotrigger cam/arm too?
I would have to if I wanted to make a super kit. (grip frame + AT + PA pump)

In all seriousness though yes. Probably similar to the CCM style in the mechanics but I'll figure out my own aesthetic.

Have not done much on this project because I really want to get back on track with the PA pump kit project now that the mill is back up.
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