Author Topic: Powder Slides  (Read 1044 times)

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shell70634

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Powder Slides
« on: March 31, 2020, 09:31:08 am »
Why are they brass?  What properties of brass make it preferable over aluminum?

fc60

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Re: Powder Slides
« Reply #1 on: March 31, 2020, 12:58:49 pm »
Greetings,

Brass will not gall in the Zinc powder slide housing. Aluminum will.

Cheers,

Dave

FOR_Star

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Re: Powder Slides
« Reply #2 on: April 04, 2020, 11:33:06 am »
Dave,

Why were the powder slide housings made of zinc vs. aluminum?
Warren
Fair Oaks Ranch, Texas
Star owner since 1979

NYKenn

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Re: Powder Slides
« Reply #3 on: April 04, 2020, 12:16:35 pm »
I can only speculate, as whoever made the decision I would suspect is long past, unless one of our older members knows.
 
Aluminum is one of the metals that is especially susceptible to Galling. Brass and Bronze less so and are often utilized for moving parts, such as bushings and bearings, etc.  It is possible the materials were chosen specifically because of those characteristics?.

One way of preventing or at least limiting galling is by the use of lubricants, not something you would really want in and around powder.

 
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fc60

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Re: Powder Slides
« Reply #4 on: April 04, 2020, 01:04:17 pm »
Dave,

Why were the powder slide housings made of zinc vs. aluminum?

Greetings,

Not sure why. The metal is close to Zamak which is available from several sources. It melts and pours like Lead.

Metallurgy is not my strong suit.

Star did a lot of interesting things. Especially the use of non off the shelf threads.

Cheers,

Dave

Richard Hubbard

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Re: Powder Slides
« Reply #5 on: April 04, 2020, 03:12:03 pm »
Ziinc is a lot tougher than aluminum. 

rbwillnj

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Re: Powder Slides
« Reply #6 on: April 04, 2020, 04:50:18 pm »

Why were the powder slide housings made of zinc vs. aluminum?

As Dave said, I think the powder slide housings were zinc because they were easy to cast and machine, and I think they would hold up better.   
The first powder slide housings were actually bronze/brass, but changed to zinc very early.

I actually have an #11 base that was cast with zinc rather than aluminum.  It weighs twice as much.

Bruce Williams
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varmintpopper

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Re: Powder Slides
« Reply #7 on: April 05, 2020, 12:57:24 am »
Pure speculation:  I've heard Star made sprinklers of some sort of cast metal, could be a relationship

Good Shooting

Lindy