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| Press fits into cast iron. |
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| DaveH:
Hi, I have a cast iron 120mm dia disc about 22mm think, it has a 50mm dia thro’ hole and 3 equally spaced 10mm dia holes on a 82.6mm PCD. It is a camlock D1-4 adapter plate for a 160 chuck, that I could destroy to the above dimensions. (But probably not) However I need the 50mm thro’ hole “plugged”. Now I have a real fear of force fits into cast iron, I’ve had a couple of them break. :( Now I see John S did it in his post http://madmodder.net/index.php?topic=5469.msg57680#msg57680 May be John S and anyone else could give me a few possible ways to do it :) :beer: DaveH |
| John Stevenson:
Aahh, now I cheated with mine. I get easily frightened on a long bore of getting it stuck partway and not being able to go either way. That pump out rigger was bored and the part made to a tad above size. It was then polished up and retried until it was a slip fit into the housing, this way I know it won't stick. Then it was liberally smeared with Loctite, pressed in and secured with two grub screws from the side. If had been something like your job i could have secured it by two or three grub screws drilled and tapped half and half into the face of the slug and plate. John S. |
| DaveH:
John S, Thank you John. I will save it, (the cast iron one) and make a new D1-4 adapter out of steel. Thanks :beer: DaveH |
| picclock:
Although I've never done it, could it be silver soldered? I've read that silver soldering cast iron is OK. From the cupalloys site (http://www.cupalloys.co.uk/joining-cast-iron-c100028.html) :- "The main difficulty associated with silver soldering cast iron is due to the presence of carbon on the surface which prevents the alloy "wetting" onto the iron. It must be removed. The flux is not capable of doing so. The best technique is to heat the cast iron up to a red heat with the oxidizing part of the flame (outside the blue zone!) This burns the carbon from the surface. Allow it to cool. Clean the components with a stiff wire brush. Braze as normal using HT5 flux." Not affiliated to Cup Alloys in any way. Best Regards picclock |
| Davo J:
I left around 0.05mm for press fit on a plug into a face plate. http://www.woodworkforums.com/f65/fitting-250mm-chuck-face-plate-12x36-lathe-121922/ What are you making? Dave |
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