Allchin help

Hi if there are any allchin builders out there can I ask a question about the lh driving boss

Did the casting you had have the ratchet stops for the winding gear cast in or do I have to cut them myself

Neither the drawings nor the book makes it clear but some of the pictures liik different to what I have

Thanks

Dougie

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Hi Dougie, long time since I built my Allchin, but I'm fairly sure that the Reeves' casting had the basic shapes cast in.

No doubt some fettling with a file was needed, and probably the outside diameter was turned.

HTHs

Thanks for the replies

I bought a lot of old second hand iron castings that are good quality

I will post some pics tomorrow of what I think are the r and l hahd bevel gear centres

Do I still need to add pics to my album before they appear here or has it got easier?

Dougie

Thanks for the replies

I bought a lot of old second hand iron castings that are good quality

I will post some pics tomorrow of what I think are the r and l hahd bevel gear centres

Do I still need to add pics to my album before they appear here or has it got easier?

Dougie

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The book would seem to suggest that the 8 dogs are cast in as he says the casting can't be held in a 3 jaw due to them and later says they can be cleaned up with files.

Though with various sources of castings there may be differences in patterns and it would not be hard to machine the dogs on a rotary table if not cast.

EDIT this casting on station Road has them cast in.

Edited By JasonB on 02/07/2021 19:25:00

Hi

These first two pics are what I thi k is the casti g for the lh drive centre without dogs cast in, it has a plain back, not like the one shown in the book and has a diameter of 3 5/16,the third pic is what I think is the right one

Any info would be appreciated

Dougie

Edited By JasonB on 03/07/2021 12:16:16

Thanks Jason

I was starting to loose the will to live trying to get that pic in the right thread

Dougie

Hi Dougie, that could be a drive centre casting without the dogs, but it's not as Reeves used to supply, and AFAIK,they were the only mainstream suppliers of 1.5" Allchin castings. Maybe a smaller supplier though.

When the Allchin design was published, milling machines were very rare in ME workshops, and rotary tables even rarer so the trade would supply the more detailed casting.

I would say it is the "left hand driving boss" and you will have to mill the dogs into the outer edge.