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Old 01-14-2013, 07:11 PM   #1 (permalink)
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Hammer 7 Bolt

Now that I am feeling a little better and will get back to both the "real" job and to Brass Monkey Customs projects, I have decided to open a discussion regarding the extra bolt that Lou (lmartin) of Kingman was nice enough to send me for experimentation purposes.

Points I would like our group to consider:

What, if any, improvements would we like to attempt on this bolt?

Would something like a TPC be something of interest?

Is there anything reasonable we would want tried on this bolt?

My thoughts...

I would like to create/have someone with a CNC lathe (Alpha, Super Staunchy) create a stainless steel version of the bolt, once the experimentation process has been completed. The one place where I see this marker wearing out is the bolt edge where the sear connects.

As the bolt already has a set of grooves to protect the detents, would it be beneficial to continue these grooves all the way around, so the if the breech stub is rotated in the wrong direction, the detents are not damaged? My counter point is, maybe Kingman might want to make the retaining counterbores on the breech stub into a slot, which would not allow the breech to rotate in the wrong direction. Others have already made this modification, so I would want their opinion.

The idea of a TPC/diffuser is interesting, but I personally don't feel it is worth the additional complexity/money/effort. I would like the opinion of people that have used Phantoms with a normal TPC and a completely drilled out TPC. They are likely to have the most complete data.

So, let the discussion begin...

Ty

Pictures:

Hammer 7 Bolt - Front


Hammer 7 Bolt - Bottom


Hammer 7 Bolt - Passengers side


Hammer 7 velocity adjuster


Hammer 7 Bolt and velocity adjuster


Hammer 7 Bolt and velocity adjuster 2
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Last edited by tymcneer; 01-14-2013 at 09:21 PM. Reason: Added promised pictures
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Old 01-14-2013, 07:17 PM   #2 (permalink)
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does it have an anti double feed sear? or did you only get the bolt?
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Old 01-14-2013, 07:20 PM   #3 (permalink)
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I only received the bolt.

The breech stub has both an anti double and anti rollout detent. It is a damn great design.

I will post some photos of the bolt later tonight on the first post.

Ty
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Brass Monkey Customs

Brass Freak compatible and Equation inserts in .665, .670, .675, .678, .680 and .685

Still selling brass tubing, with .678 barrel stock now available!

My feedback: MCB - eBay - AO
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Old 01-14-2013, 07:24 PM   #4 (permalink)
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I think some serious thought should be put into a diffuser or venturi tip. I haven't seen any reason for stainless, bolts for pumps have been made out of aluminum for years.
I think paint breaks because the air hitting the ball is to harsh. I have been trying to figure a way to diffuse the air myself.
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Old 01-14-2013, 07:25 PM   #5 (permalink)
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I will pull the bolt apart tonight and see what I can come up with.

Ty
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Brass Freak compatible and Equation inserts in .665, .670, .675, .678, .680 and .685

Still selling brass tubing, with .678 barrel stock now available!

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Old 01-14-2013, 07:26 PM   #6 (permalink)
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if you thread a sideways hole into the bolt, to fit a grub screw, for the purpose of adjusting velocity in the same way as a 98, and then drill a hole on the side of the body to fit that same screw, it should allow you to adjust velocity without a special tool. will it also alleviate the impact of air on brittle paint?
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Old 01-14-2013, 07:35 PM   #7 (permalink)
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I was messing around with a few different bolts today, old Tagmaster and original Hammer bolts have a star shaped diffuser adjusted with a flathead.
it could be a drop in piece for the stock bolt.
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Old 01-14-2013, 07:42 PM   #8 (permalink)
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Ah cool!
What would happen if you made the bolt lighter or even heavier?
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Old 01-14-2013, 07:50 PM   #9 (permalink)
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Quote:
Originally Posted by heinous View Post
if you thread a sideways hole into the bolt, to fit a grub screw, for the purpose of adjusting velocity in the same way as a 98, and then drill a hole on the side of the body to fit that same screw, it should allow you to adjust velocity without a special tool. will it also alleviate the impact of air on brittle paint?
It could work, but would require modification to the bolt, also. I'm not really convinced that this is the better way to go, but I am always up for new ideas. Currently, the bolt has a down the barrel style velocity adjuster.


Quote:
Originally Posted by capitalpaintball View Post
I was messing around with a few different bolts today, old Tagmaster and original Hammer bolts have a star shaped diffuser adjusted with a flathead.
it could be a drop in piece for the stock bolt.
I was thinking that the diffuser would need to replace the velocity adjuster, and add the diffusion pattern, so that there is no need for additional parts.


Quote:
Originally Posted by super trowel View Post
Ah cool!
What would happen if you made the bolt lighter or even heavier?
Weight of bolt only makes a difference in the "blow open" that occurs when shooting without the pump held forward. As it stands, there is very little of this due to the return spring Kingman selected.

Ty
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Brass Monkey Customs

Brass Freak compatible and Equation inserts in .665, .670, .675, .678, .680 and .685

Still selling brass tubing, with .678 barrel stock now available!

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Old 01-14-2013, 08:28 PM   #10 (permalink)
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Venturi bolt would be a good thing to dry. Perhaps some sort of anti-chop angle on the tip of the bolt, like what some of the eclipse cure bolts have. of course you're not going to be shooting 15 bps with the hammer 7 (at least not for a few weeks when someone mods an auto-hammer [jack-hammer??]) however, having some sort of anti-chop feature besides those present could potentially be helpful. I'll look at mine when it comes in a few days, see what other ideas I can come up with.
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