c 1" Tooling Ball needed or Advice Please

[clayton21]

Ladies and Gentlemen,

I hope you are all staying safe in these uncertain times.

I'm about to drill the oblique port holes in my 6" Scale twin cylinder casting. Joe Pieczynski (USA) has just posted an excellent (to a newbie like me) Youtube Video on this and uses a Tooling Ball.

I can't find any for sale in Europe - all available have to be ordered from the USA with substantial Postage etc.

Does anyone have one for Sale / Hire please? Or does GB Engineering use a different tool and if so what is it please.

As ever your guidance / advice will be very gratefully received.

Kind regards.

Andrew

[Henry Maudslay]

I imagine a 1" ball bearing would do. Look on eBay first. I suppose bearing suppliers might have them,but you'd probably need to buy a whole lot.

[weidner]

Never heard of one , so perhaps could you post a link to the video , it sounds interesting .

[Brian Hutchings]

Does it have to be a 1" ball? I have a 1/2" one that you would be welcome to borrow. It has a 1/4" stem (if I remember correctly).I can measure it properly if it is of any use.
Regards
Brian

[clayton21]

Thank you.

Here is the link : https://www.youtube.com/watch?v=KjQscFVgQgU&t=185s

A 1/2" would probably do - I went for a larger simply because I'm building in 6" Half-size scale and hence the cylinders are 3" diameter. Having said that I feel 1/2" should work just as well!! I'll pm you.

Kind regards,

Andrew

[mike-f]

http://www.ballbiz.co.uk/uk-spec-pro...ling-balls.php

[chris w]

hi, you can buy single balls (bearings) online, i got a single 2" ball from " the bearing boys" or "the bearing guys" online for £11 delivered.
stay safe,
chris.

[The Melter]

You could use the full balls or hemispheres from a Moore and Wright tramell set for that

[BUNGLE]

Strangely I watched that you video ( I do like to watch a bit of Joe at times - often pick up a little tip), the ball thing was new to me. He is building a stationary engine in a series of videos I believe. He is easy to listen too.

[bertie8ton]

I’m completely lost as to why the design calls for an orphaned stud in the middle of 2 ports.
Why not rotate the stud pattern by 30 degrees and drill a single port?
On a full size, surely that must significantly weaken a casting?