I'm doing the bearings in the turret (I'll elaborate on why below)...
I purchased a pair of the two big bearings NTN 6013-ZZ and NTN 6013-ZZNR that it rotates on.
I also grabbed new thrusts for the Z-axis screw and will put those in while I have they covers off of the machine.
After I removed the turret I put an indicator on the piston and pushed it radially back and forth fairly hard.
The total reading (radial play with the machine powered off / no hydraulic pressure) was .0015".
(photo of where I measured).
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The reason for my post is that I'm looking for a little guidance / a sanity check:
What's the spec on these things for radial play?
Is there a spec for the fit between that piston and the splined shaft?
(My splined shaft is fairly loose inside the piston, maybe .005" radial by feel).
(My assumption is that the female spline and turret are pulled up tight against the piston by the nut, so the play in the splined shaft is by design.)
So I'll take photos and document this bearings swap for the next guy.
Why am I doing this? (I saved this part for last, so you guys don't have to read my ramblings). :Yawn:
My QT-10N has been running well since I rebuilt the spindle last spring.
My turret has been slightly out of alignment in the Y direction on my drills and bars.
(2 axis machine, I am just using the Y for description).
When I first set up the machine I checked the nut on the shaft and tightened it up.
Then I adjusted the index coupling and ran a coaxial dial indicator in four different tool pots.
I could not get all of them perfectly aligned. This causes my drills to drag a bit, which is no good.
What is actually causing this issue is that the turret seems to sag a little when the hydraulic piston un-clamps.
I just purchased a set of new spade drills and I really want to set them up right on center.
In other words, time to rebuild this turret!
I purchased a pair of the two big bearings NTN 6013-ZZ and NTN 6013-ZZNR that it rotates on.
I also grabbed new thrusts for the Z-axis screw and will put those in while I have they covers off of the machine.
After I removed the turret I put an indicator on the piston and pushed it radially back and forth fairly hard.
The total reading (radial play with the machine powered off / no hydraulic pressure) was .0015".
(photo of where I measured).
The reason for my post is that I'm looking for a little guidance / a sanity check:
What's the spec on these things for radial play?
Is there a spec for the fit between that piston and the splined shaft?
(My splined shaft is fairly loose inside the piston, maybe .005" radial by feel).
(My assumption is that the female spline and turret are pulled up tight against the piston by the nut, so the play in the splined shaft is by design.)
So I'll take photos and document this bearings swap for the next guy.
Why am I doing this? (I saved this part for last, so you guys don't have to read my ramblings). :Yawn:
My QT-10N has been running well since I rebuilt the spindle last spring.
My turret has been slightly out of alignment in the Y direction on my drills and bars.
(2 axis machine, I am just using the Y for description).
When I first set up the machine I checked the nut on the shaft and tightened it up.
Then I adjusted the index coupling and ran a coaxial dial indicator in four different tool pots.
I could not get all of them perfectly aligned. This causes my drills to drag a bit, which is no good.
What is actually causing this issue is that the turret seems to sag a little when the hydraulic piston un-clamps.
I just purchased a set of new spade drills and I really want to set them up right on center.
In other words, time to rebuild this turret!