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Repair and recommission of Cazeneuve HBY 590

I am sorry for my poor english writting

No trouble with your writing!

I struggled with removing chucks for a while. I found you can remove the smaller chucks with radial mallet blows close to the free end. This seems to work ok. I'm not sure if this is a better or worse method than chucking a knockout bar like the video. I can see pros and cons to both.

I like the Caz chuck mounting. It's not as quick as the camlock for sure, but it is stiffer. The big drawback is expensive backplates. I will make my own when needed.
How to make a Cazeneuve backplate.

Sorry, it's in french, but you can use a translator.

Please start from the top of this page.

My tachometer is working.

50 Hz motors allow bigger speed than 60 Hz ones.



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Home made following rest.


Maximum capacity 120 mm diameter (4, 75")
Downstream or upstream /tool rest
Uses the original Cazeneuve static rest supports.


Made from 30 mm (1-3/16 ") steel sheet.
Polyurethan paint RAL 7024 (Cazeneuve original color)
Hole at the top for hanging. About 25 kg included supports.

Hi TRD, very nice job! My HBX590 is missing the live rest also, but I still have the live rest from my former HBX360. Probably I make an adapter plate to accommodate the "360" rest to make it fit on the "590". BTW, I have a DIN55026 or ISO 702/1- size 6 spindel nose, front mounted chucks. These are pretty rare to, just like Caz spindel nose. attached are pictures of the spindle nose and the "360" live rest, which can not stand the comparison with your life rest.


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Hello Ducbertus.

I have a 360 HBX too. But the 2 rests aren't Cazeneuve rest. They come from a Colchester Lathe and are slightly modified.


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On the left side: DIN55026-6
On the right side: Cazeneuve standard 160 mm diameter


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My former HBX360 had a Camlock 5 nose. I liked that system, because you can swap chucks fast. Did a lot of repairs to the 360, which is documented in one of the HBX360 threads here in the past.
Currently I use a Röhm Hi-Tru 250 mm chuck mostly. this one needs to be split in half in order to remove the back plate (see pic.)
The adaptation you made to the Colchester rest is rather easy one, isn't it? My HBX590 came with the original fixed rest. As far as the life rest concerns, I like your solution. Furthermore it had a lot of oil leaks and the geometry was dramatic. I've machined the cover in front of the head stock and turned an O-ring groove in it and renewed the oil glass by a saphire watch glass. Is cheap and works great. The opposing labyrinth plate on the spindel it self needs a carefull positioning. But sofar it's leekfree.


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I don't know exactly how it is made the lubrication web of the HBY.

But, HBX have a flow adjusting tap on the spindle oil feed. Old HBX with cast-iron base and the high pressure pump on the spindle motor have a flow adjustment screw on the rear of the pump. I don't know how it is for the HBX with welded steel base and separate pump.

In order to avoid leaks, it is important to use a low viscosity oil. ISO 32 is a good choice. People who use ISO 46 can have leaks when the temperature is low.

ISO HV 32 is better than ISO VG32 because is less dependant from temperature.

For me Camlock is the better system. I had a D1-4 on my former de Valliere and I have a D1-6 on my Graziano SAG 508 (SAG 20 in USA. ) It's better because it's univeral. You can find all the accessories you need. Used, i'ts less expensive. Even in France used specific Cazeneuve chucks and backplates are difficult to find.

A method for disassembling a heavy chuck on the Graziano.

Yes, the adaptation of the two Colchester rests is very easy. A single piece of steel is necessary for the following rest. And two for the static.

In fact it's not very important to align the center with accuracy. Even if there is a gap in altitude or position, one can adjust.

The Colchester rest have two important features :
1) they have bearings (but it is possible to make plastic or brass contact parts)
2) they have micrometric adjustment.

Surprisingly, these english rests have american threads. 1-1/2 UNF for the static rest.