Introducing the Micromag 2009

[riceboi]

thx for the update

[Watcher]

I just spilled a bunch of hot pizza on my keyboard when I jumped up from excitement!

[micromag-man]

The 8 tabbed index piece is SO amazingly neat and awesome and totally cool, what gave you guys the thought to go with that idea? Its so complex, Yet very simple as well. I am SO looking forward to getting mine in my hands and seeing it all work together. At a later time, it would be interesting to know how long each part takes to CNC from stock to raw finished product?

[vf-xx]

Notice the oring face groove in the breach block . The oring is compressed against the body when the front block is bolted in place taking out any unwanted forward/rearward movement .

The front of the breach block with the 8 lug index pattern has a -.001/+ 0.00 clearance in relation to the front block so there will be no play side to side reguardless of the indexed position .

Ahh I had wondered how tight the tolerances were. Cool.

[ZoomZ@PTP]

The 8 tabbed index piece is SO amazingly neat and awesome and totally cool, what gave you guys the thought to go with that idea? Its so complex, Yet very simple as well.

It took me about 2 weeks and 5 other design ideas before settling on this type of indexing setup . It was derived from another type of an indexer from a gun that PTP never made that had external square locking fingers .

This design hit me while i was in the shower

[going_home]

This design hit me while i was in the shower

Inspiration in the shower.

[pepper]

Zoom
With the barrel and hoppers weight on the front end and the body, valve and tank on the rear end. Will there be any chance of flex at this point? If there is flex the breach and body might "chatter" when shot? Just brain storming.

[vf-xx]

Zoom
With the barrel and hoppers weight on the front end and the body, valve and tank on the rear end. Will there be any chance of flex at this point? If there is flex the breach and body might "chatter" when shot? Just brain storming.

I see your concern, but I highly doubt it. Given the way the loads run I wouldn't expect it. I'd only expect flex if you see weight on the front ant the back of the gun. And all you really have out front is the barrel. The hopper is centered over breech and should distribute its weight evenly. Also, with the back end of the breech captured by the body (with presumebly tight clearances). I wouldn't worry about it.

[Forest_ptp]

I am sure that this has been asked and answered, but what is the pin size for the on/off. RT pin?

Thanks

I'm not sure if this has been covered again or not, but the thread went in two directions (sear pin vs. on/off pin I think...) - The sear pivot pin will be slightly shorter because of the narrower body. We'll be building them, but a cut down stock sear pin should be fine as well.

The on/off pin will technically be the same RT length, which non-technically means that you take the longest one you can find and grind the daylights out of it until the marker goes full auto reactive... It's very similar to the way we torque bolts - crank down on the bolt until it snaps, and then back it off about a quarter turn...

[BigEvil]

I'm not sure if this has been covered again or not, but the thread went in two directions (sear pin vs. on/off pin I think...) - The sear pivot pin will be slightly shorter because of the narrower body. We'll be building them, but a cut down stock sear pin should be fine as well.

The on/off pin will technically be the same RT length, which non-technically means that you take the longest one you can find and grind the daylights out of it until the marker goes full auto reactive... It's very similar to the way we torque bolts - crank down on the bolt until it snaps, and then back it off about a quarter turn...

Forest you forgot the big smiley at the end!!!!

[ZoomZ@PTP]

[QUOTE=pepper]Zoom
With the barrel and hoppers weight on the front end and the body, valve and tank on the rear end. Will there be any chance of flex at this point? If there is flex the breach and body might "chatter" when shot? Just brain storming.


This is the main reason i decided to make these bodies out of 7075-T6 .

I highly dought there will be any flex at all in the front section on the body .

[pepper]

7075-T6 is very nice.

[ZoomZ@PTP]

Its tempered and hardened

[Mayvik]

Roughly what's the material thickness at that point (thickness either side and radius)? It looks like it's at least 80 thou ish which is probably fine as long as you don't drop your gun on a boulder. I've seen aircraft primary structure parts that are way thinner than that and I'm pretty sure no one is going to experience the same loads on their gun...

Also..SHINY AWESOME!!!

[ZoomZ@PTP]

.175 Mayvik

After getting a perfect breach off the machine and spending 20+ hours programming , setting up and tweeking the part , im going to let that machine run and cut all 150 breach's .

I dont want to go through that setup tweeking again so im going to let them run out.

When those are off that machine i will run the front blocks .