Your game's ball bearing size - listed

Advice and guidance on repair and restoration techniques.
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treefrog
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Your game's ball size - listed

Post by treefrog »

Post moved to top of topic. I will add to & edit it as and when info is submitted - Site Admin.

This seemed like a good idea, but has yet started (mind you it could end up a very long list, unless things like Bryans are all similar and Wonders etc).... I noticed under the Parts section PM is selling various sizes, I guess it is a case of matching the machines to the numbers or of course trial and error... Anyone know what a Giant Wonders uses?

So to start and trawling this site the sizes and answers are (info trawled from the site):

Ahrens Football = 1" composite.

A = 3/4"

B = 14mm R&W multi-balls ("What's My Line" etc.)

C = 9/16" S&L Fireworks, Oliver Whales & others

D = 1/2" Payramid, Bryans allwins, BMCo allwins

E = 12mm

F = 29/64

G = 15/32"

H = 13/32"

I = 5/32"

J = 1-1/16" Steer-a-Ball (standard pinball)
allow
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Your game's ball bearing size - listed

Post by allow »

Topic moved & merged - Site Admin.

Hi everyone,

Somebody can tell me where can be found info regarding the ball heaviness and what is the exactly size of the ball (diameter)?

-Thanks
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JC
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Post by JC »

'allo Allow

The standard allwin ball size is 9/16", although some machines (in particular Bryans) use 1/2" balls. As for weight, I'm a bit rusty on the old slide rule, but if you contact the Institution of Mechanical Engineers there's bound to be someone who can work out the mass of a highly polished, case-hardened steel ball of any size. Best not do it on April 1st though, or they might think you're talking balls.
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woody
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Balls

Post by woody »

The Density of steel is between 7500 and 8000 kg/cubic metre and the volume of a sphere is 4/3 x PI X Radius cubed. The rest is maths....
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JC
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more balls

Post by JC »

Well done Woody, I'm impressed! However, as we're talking imperial sized balls here, I've dusted off the old slide rule and come up with the following:

The volume of a half inch diameter ball is 0.065 cubic inches.
The density of steel is roughly 491 lb/cubic foot, whichh equals 0.2841435 pounds per cubic inch.
Therefore the mass of a half inch ball is 0.0184695 lb.
Of course, the other way of doing it is to take a ball out of a machine and plop it on the wife's kitchen scales.

And just in case the following is of use in the design of the middle eastern allwin, the surface area of a sphere is: 4PIr squared. Therefore, the surface area of a half inch ball is 3.14 sq inches.
Last edited by JC on Fri Sep 15, 2006 1:38 pm, edited 1 time in total.
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badpenny
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Those were the days (and other Mary Hopkins songs)

Post by badpenny »

I remember well the tales my Grandfather told of the old showmen sitting around their campfires back in the 1930's. They'd be discussing the traumas of certain machines that jammed or paid out too much.
After much stroking of chins and scratching of heads old Elijah would slowly remove his pipe from his mouth, remind them all that the density tension of a surface torque was one to the power of two spirals.

After much slapping of foreheads they'd put their micrometers back in their velvet lined cases and reaching into back pockets would pull out an array of lump hammers.
"That's the spirit lads" old Elijah would confirm "A hefty tap with a 5lb smack'ometer should adjust it."
Of course that was when everything was measured in mint imperials, doubt it would work now it's in litres.

Badpenny (when there were 240 to the pound)
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JC
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Aye! those were the days, balls an' all

Post by JC »

Aye, them was the days!

When you could give the kids an inch and they'd take a mile. Or you could squeeze a quart into a pint pot, and a man could have his pound of flesh without being hauled up before the metrication board!

By the way, my computation for the surface area of a half inch diameter ball was wrong. I was either tired or the slide rule was upside down. It's actually 0.7854 sq inches :oops:
13rebel
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Ball bearing sizes

Post by 13rebel »

Topic merged - Site Admin.

Can anyone make a definitive list of ball bearing sizes for different makes of allwins? It may come in handy.
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Vintage pin ball composition and size

Post by scouserneil »

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Hi everyone, I'm currently renovating a 1932 Roll Itt Pin ball machine by Mason and Co. but don't have the information on what size ball it should use and the composition of the ball. It works by lever action hitting the ball which propels it up a chute to a metal saucer with different value holes which the ball drops through. It is an American vintage arcade machine and for 5 cents you get 10 balls. I don't want to purchase the wrong ball size or material of the ball, so any advice would be very much appreciated.
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badpenny
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Re: Vintage pin ball compsition and size

Post by badpenny »

Howdy scouserneil ............

Welcome on board, how much experience of slots have you? Can we lie outrageously to you and get away with it?

We need more details of your pinball and we demand it immediately!
Post photographs and make us jealous, direct us to library pictures and educate us. !!THUMBSX2!!
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