Project HBM-3" Forges de Gilley

alskdjfhg · May 8, 2022

Lots more cleaning to do here. But looks better minus a few gallons of crud and chips.

Thinking to make sure all the lube lines are working properly before removed the saddle from the bed. Kinda in the best position to work on it.

Sent from my SM-G965U using Tapatalk

arenjenkins · Sep 5, 2022

This is a neat thread, any updates?

alskdjfhg · Dec 20, 2022

Yes I've slowly been working on it. Got the head removed, and started tearing into the main gear boxes

Mostly been lazy and not posting like I should!

Romain · Jan 2, 2023

Good Morning,
I live in France and have the same machine in the workshop.
Congratulations on the renovations. Mine works well. Here are some works done with it.

ncjeeper · Jan 8, 2023

Nice HBM. That is a heck of a micrometer on the wall there.

Garwood · Jan 8, 2023

Romain said:
Good Morning,
I live in France and have the same machine in the workshop.
Congratulations on the renovations. Mine works well. Here are some works done with it.

What's going on with the live center in the tailstock bore?

Romain · Jan 9, 2023

ncjeeper said:
Nice HBM. That is a heck of a micrometer on the wall there.

Good morning, Yes, it is a 1500mm (60') micrometer, only for collection.....

Romain · Jan 9, 2023

Garwood said:
What's going on with the live center in the tailstock bore?

The long boring bar were mounted between the spindle and te live center. It ils probably an home assembly.... .

Tyrone Shoelaces · Jan 9, 2023

Romain said:
The long boring bar were mounted between the spindle and te live center. It ils probably an home assembly.... .

I’ve never seen that done before. The bar normally ran in a sleeve or bush in the outer support.

Regards Tyrone.

Romain · Jan 9, 2023

I have never seen that before either... . I never tried.
I see you are from Manchester, I have also in my workshop a smal HBM Kearns S Type who was made in Manchester....
Regards.

Tyrone Shoelaces · Jan 9, 2023

Romain said:
I have never seen that before either... . I never tried.
I see you are from Manchester, I have also in my workshop a smal HBM Kearns S Type who was made in Manchester....
Regards.

I know them well. I worked quite a few “ S “ types. A very handy little machine.

Regards Tyrone.

Peter S · Jan 9, 2023

Garwood said:
What's going on with the live center in the tailstock bore?

I'll show my ignorance here - but it seems quite a clever idea if you needed to knock up a boring bar for a light machining job? Saves making sleeves or bushes, specially if the bar is small diameter.

Reason it makes some sense to me is because I have done line boring on a lathe with a long boring bar between centres.

Garwood · Jan 9, 2023

Peter S said:
I'll show my ignorance here - but it seems quite a clever idea if you needed to knock up a boring bar for a light machining job? Saves making sleeves or bushes, specially if the bar is small diameter.

Reason it makes some sense to me is because I have done line boring on a lathe with a long boring bar between centres.

I spose so. Thing is though, what's a small bar to you? 1"? Think about that now. How far can you hang the quill out on that little guy? 24" maybe? Now how wide is the table? Now add the length of the bore(s). So now you got a 1" bar 3-5 feet long supported by a live center and tensioned by the quill? And you're going to cut what with this?

HBM work seems like it often hinges on absolute max rigidity of everything involved. Making tooling is very commonplace for HBM work. Because HBM setups can easily take hours it's not a big deal to spend 10 minutes making a proper bushing.

Ive spent all day making a tool and setting up for 30 minutes of machining.

Tyrone Shoelaces · Jan 10, 2023

Peter S said:
I'll show my ignorance here - but it seems quite a clever idea if you needed to knock up a boring bar for a light machining job? Saves making sleeves or bushes, specially if the bar is small diameter.

Reason it makes some sense to me is because I have done line boring on a lathe with a long boring bar between centres.

It is a good idea just as long as the line boring bar is stout enough and you’re only taking light cuts.

Regards Tyrone.

Peter S · Jan 10, 2023

Garwood said:
I spose so. Thing is though, what's a small bar to you? 1"? Think about that now. How far can you hang the quill out on that little guy? 24" maybe? Now how wide is the table? Now add the length of the bore(s). So now you got a 1" bar 3-5 feet long supported by a live center and tensioned by the quill? And you're going to cut what with this?

HBM work seems like it often hinges on absolute max rigidity of everything involved. Making tooling is very commonplace for HBM work. Because HBM setups can easily take hours it's not a big deal to spend 10 minutes making a proper bushing.

Ive spent all day making a tool and setting up for 30 minutes of machining.

Good points. In particular, I was overlooking the size of the HBM table.

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