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9" SM Utilathe Restoration
- Thread starter YYCHM
- Start date
PM sent.
That sounds better. When you reinstalled the nut, there should be a brass slug in the setscrew hole to protect the spindle threads. If it fell out you will crush the threads with the setscrew and that won't be fun next time the nut has to be adjusted or removed.
Brent H - what machine are you parts sourcing from? The bearing list you show doesn't match up well with list in the SM9" manual.
Brent H - what machine are you parts sourcing from? The bearing list you show doesn't match up well with list in the SM9" manual.
Ahha,,,, sailors,,,, you just can't trust them
lol. The uber precision for the SM"9 spindle is over $400 cdn and I saw it for $140 usd, the spindle tail bearing is about $30. I installed new 6203's when I was having the issues with my 9" and they were cheap and easy.
lol. The uber precision for the SM"9 spindle is over $400 cdn and I saw it for $140 usd, the spindle tail bearing is about $30. I installed new 6203's when I was having the issues with my 9" and they were cheap and easy.
Ahha,,,, sailors,,,, you just can't trust them
What issues were you having?
How's this for a more scientific approach for measuring the vibration?
How much does the water in a shot glass placed on top of the head stock jiggle.
Essentially nothing with the belt removed and I get the same result placing the shot glass on the mill running at 770 RPM.
With the belt installed and the spindle in neutral, it jiggles quite a bit and about the same amount when turning the spindle at 900 RPM.
On another note. How much run out should I be seeing or should I say is acceptable on the outside of the tail end of the spindle? I'm seeing 0.001 with a DI, but is that considered a trued surface?
How much does the water in a shot glass placed on top of the head stock jiggle.
Essentially nothing with the belt removed and I get the same result placing the shot glass on the mill running at 770 RPM.
With the belt installed and the spindle in neutral, it jiggles quite a bit and about the same amount when turning the spindle at 900 RPM.
On another note. How much run out should I be seeing or should I say is acceptable on the outside of the tail end of the spindle? I'm seeing 0.001 with a DI, but is that considered a trued surface?
I'm seeing less that 0.001 on my cheap offshore MT3 center mounted in the spindle.
Bearings are an option. Just trying to establish the source of this vibration. Something I did notice when I was swapping pulleys was that the motor pulley has a couple of dings on the second largest and third largest sheaves which might affect the two most used belt positions.
Out of curiosity, I re-installed the original motor pulley we had replaced earlier to see how that behaved. Ya, that thing is pooched, it has a discernible wobble to it and the machine vibration went way up. It needs to be bored out and a bushing installed to restore it back to a usable state.
Bearings are an option. Just trying to establish the source of this vibration. Something I did notice when I was swapping pulleys was that the motor pulley has a couple of dings on the second largest and third largest sheaves which might affect the two most used belt positions.
Out of curiosity, I re-installed the original motor pulley we had replaced earlier to see how that behaved. Ya, that thing is pooched, it has a discernible wobble to it and the machine vibration went way up. It needs to be bored out and a bushing installed to restore it back to a usable state.
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I just tried scientific test 2.0, there is just about nothing for water movement, no waves, no tsunami and no Jurassic park rings.
I don't have an MT3 center but my MT2 center in an MT3 adapter gets me just under .003. On the spindle I get not even the width of the line on the dial indicator.
I don't have an MT3 center but my MT2 center in an MT3 adapter gets me just under .003. On the spindle I get not even the width of the line on the dial indicator.
Not a ripple at 900 RPM turning eh?
Despite the vibration, I'm still able to achieve a pretty decent finish for the most part.