jhovel
24th Jan 2016, 09:17 PM
Well, I feel its time I post a bit about one of my latest projects.
I actually been working on it for several weeks, but with little to show....
A few years ago, I bought the smallest two machine tools from the demolition sale of a 100 year old engineering workshop and foundry here in Bendigo.
One was a 60's Servian pedestal drill press, since restored and in daily use. The other a 1920's Van Norman cylindrical 'piston' grinder.
360620
RayG and Josh helped me collect and unload them - which was greatly appreciated. We ended up having to dismantle the grinder to be able to move it. VERY heavy castings.
360629 360630360631 360632
This is the only documentation I can find on the net: and ad from 1922
360633
The machine was missing the spindle drive motor, the grinder head lead screw and nut (and its mounting post), tailstock, traverse hand wheel and the entire cooling system - and lots of hardware.
The spindle bearings were shot and lots of parts seized, and all of it rusty, grubby and lots of it knocked about.
However, closer inspection of the slideways showed little and even wear, relatively easily restored to functional.
So, progress to date is best illustrated in photos. Some of the parts I hade to make from imagination. GregQ gave me a leadscrew and nut some time ago from his left-over stocks. That truned out to be perfectly suitable at 3/4"x10tpi, giving a handwheel scale resolution of 0.0004" per division! The mounting post for the nut was the most tricky part to make, but came out functions well while looking ugly :) .
All bearings had been greased instead of oil lubricated as designed, so that took a bit of extra cleaning....
This isn't intended to be anything like a faithful restoration, rather a rebuild to make it usable.
The workhead spindle has a continuous taper bearing for its full housing, with a step turned halfway for mounting and adjusting a plain bronze thrust bearing.
I chose to use a 900rpm 3 phase 1/4HP motor with a single reduction belt drive to replace the large dual reduction someone had fitted along the way in lieu of the original gear drive. A small Siemens VFD will allow me to vary the work head speed.
I contains an odd sized collet and draw bar that has had a drive flange brazed to it along the way. I may use that to fit a small 4-jaw chuck in the future. That collet is also bored to fit a #3 Morse taper centre - but only for the first third of its length....
I was give a tailstock of unknown origin some decades ago. It has now found a new home after much modification to reduce the centre height to suit the workhead....
The spindle took standard imperial sized taper roller bearings that I got locally. The drive motor is a 2HP 1440rpm 3-phase whihc will be driven by a machine mounted 1.5kW VFD that I found cheap a while ago. It's an Italian Bonfiglioli Vectron Syn10 and is waterproof to IP65S.
Enough chatter. Looking forward to fitting electrics and making it work....
360634 360635
360636 360637
I actually been working on it for several weeks, but with little to show....
A few years ago, I bought the smallest two machine tools from the demolition sale of a 100 year old engineering workshop and foundry here in Bendigo.
One was a 60's Servian pedestal drill press, since restored and in daily use. The other a 1920's Van Norman cylindrical 'piston' grinder.
360620
RayG and Josh helped me collect and unload them - which was greatly appreciated. We ended up having to dismantle the grinder to be able to move it. VERY heavy castings.
360629 360630360631 360632
This is the only documentation I can find on the net: and ad from 1922
360633
The machine was missing the spindle drive motor, the grinder head lead screw and nut (and its mounting post), tailstock, traverse hand wheel and the entire cooling system - and lots of hardware.
The spindle bearings were shot and lots of parts seized, and all of it rusty, grubby and lots of it knocked about.
However, closer inspection of the slideways showed little and even wear, relatively easily restored to functional.
So, progress to date is best illustrated in photos. Some of the parts I hade to make from imagination. GregQ gave me a leadscrew and nut some time ago from his left-over stocks. That truned out to be perfectly suitable at 3/4"x10tpi, giving a handwheel scale resolution of 0.0004" per division! The mounting post for the nut was the most tricky part to make, but came out functions well while looking ugly :) .
All bearings had been greased instead of oil lubricated as designed, so that took a bit of extra cleaning....
This isn't intended to be anything like a faithful restoration, rather a rebuild to make it usable.
The workhead spindle has a continuous taper bearing for its full housing, with a step turned halfway for mounting and adjusting a plain bronze thrust bearing.
I chose to use a 900rpm 3 phase 1/4HP motor with a single reduction belt drive to replace the large dual reduction someone had fitted along the way in lieu of the original gear drive. A small Siemens VFD will allow me to vary the work head speed.
I contains an odd sized collet and draw bar that has had a drive flange brazed to it along the way. I may use that to fit a small 4-jaw chuck in the future. That collet is also bored to fit a #3 Morse taper centre - but only for the first third of its length....
I was give a tailstock of unknown origin some decades ago. It has now found a new home after much modification to reduce the centre height to suit the workhead....
The spindle took standard imperial sized taper roller bearings that I got locally. The drive motor is a 2HP 1440rpm 3-phase whihc will be driven by a machine mounted 1.5kW VFD that I found cheap a while ago. It's an Italian Bonfiglioli Vectron Syn10 and is waterproof to IP65S.
Enough chatter. Looking forward to fitting electrics and making it work....
360634 360635
360636 360637