Gas Mask HMB

[ravenhammer]

What part of the gas mask core is the HMB? or is it just where the HMB ends up in relation to the overall mass of the ball.

[Rowdy]

When they pour a ball the Gas Mask core has to be suspended in the middle of the mold. There is a thin "tail" that is used to "hang" the core with. After the ball cools,they cut the tail off flush with the surface of the ball. That's what the HMB is.

[blistershurt]

according to Mo Pinel, the MB is the 90 degree cross section with the base of the pin. Look at some of the balls with HMB at Morich's site and they will have "90 degree cross section" marked with an X and then the MB marking on the X

[Rowdy]

I belive Raven was referring to the "HMB" stamped on Hammer balls. Mo don't know Hammer.

[blistershurt]

well in general MB is the part of the ball that is closest to the surface, on the same side as the CG of the ball

I'm pretty sure that all balls are at 90 degree cross sections, but I'll have to check again.

[slap]

By defintion the mass bias is found by measuring from the pin through the CG 6 3/4".

Each company uses a different notation. Hammer uses LMB and HMB, Morich uses a clover, I think strom uses a key.

[Thepainscoming]

Each company uses a different notation. Hammer uses LMB and HMB, Morich uses a clover, I think strom uses a key.
Slap, the shift series uses the key. The paradigm series uses a RAD stamp because thats what the weight block is called.

[ravenhammer]

When they pour a ball the Gas Mask core has to be suspended in the middle of the mold. There is a thin "tail" that is used to "hang" the core with. After the ball cools,they cut the tail off flush with the surface of the ball. That's what the HMB is.

I thought that was the Pin?

is the pin where the Flip Block is?

[TenPinSniper]

Here is a good video of Symetrical and Asymetrical cores.

This video explain's RG, Diff and Intermediate Diff or Mass Bias.

http://www.bowl.com/bowltv/main.aspx
Then go to Credibility, then select the Core Story.

The rest of videos are worth the watch also...

[ravenhammer]

Cool links there, thanks a lot.

[ravenhammer]

Ok now they need like 10 more of those videos, going deeper into the parts of the ball.

[Stampy79]

Well, for all who care. Morich does not have a mass bias marking anymore. They now have a PSA or Preferred Spin Axis ! I will let anyone who wants to explain that one. I do believe that Brunswick refers to it as the same also now since Mo has bestowed his influence on the Big B guys too

[Rowdy]

See Ball Motion study and Axis Migration Study at bowl.com. Looks like all those balls that Mo gave up are starting to pay dividends.

[slap]

Well, for all who care. Morich does not have a mass bias marking anymore. They now have a PSA or Preferred Spin Axis ! I will let anyone who wants to explain that one. I do believe that Brunswick refers to it as the same also now since Mo has bestowed his influence on the Big B guys too

My fingers would go numb typing a post long enough to explain this. Plus I don't totally understand it myself. So here is the short (and slighty less accurate) version.

1. Think of the MB as a static measurement and the PSA as a dynamic measurement.

By definition, the mass bias is the point on the ball, along with the pin where the mass of the ball is closest to the surface; (whew!) the PSA is the axis the ball wants to spin around. Track flare is the migration from a bowler's PAP (initial axis) to the PSA. (final axis) (whew! again)

2. The PSA is not always in the same location as the MB. (This is the concept I don't fully understand.)

Morich and apparently Brunswick use Mo's deTerminator device to, well determine the PSA of the undrilled ball at the factory. I've also seen this called an "off set mb." Mo says he cores are so strong that the PSA of the undrilled ball remains the same after drilling.

[TenPinSniper]

Well, for all who care. Morich does not have a mass bias marking anymore. They now have a PSA or Preferred Spin Axis ! I will let anyone who wants to explain that one. I do believe that Brunswick refers to it as the same also now since Mo has bestowed his influence on the Big B guys too

If there is anything you want to share I'm always interested in gaining more knowledge. (If Slap nailed it, then good enough.) Think I've seen what he wrote from the USBC or somewhere.

http://www.morichbowling.com/MosCorner/DualAngleSeminar/DualAngleSeminar.htm