Brandenberger
Hot Rolled
- Joined
- Sep 19, 2017
Hi,
I'm scraping in a VN22LU, and have scraped the top of the column (bearing surface
for the ram).
Has anyone adjusted the ram gib on these machines?
Mine looks mostly like this in the manual:
The gib looks like this on the machine, it is a double-angle type:
The underside toward the front looks like:
From the top through the gib, you can only see 5 screws-- in the front, a SHCS accessible
from the top, then the gib locks (front and back) and two 1/2-13 screws that attach from the
bottom.
So it looks like manual isn't quite accurate... from below it looks like there is the eccentric gib lock (largest feature seen from inside), then the 1/2-13 screw accessible from below, and then a setscrew.
The same is replicated at the rear:
This one also shows the ram pinion mechanism, but has the same eccentric clamp and screw/setscrew arrangement.
One other interesting point... The gib lock seems to flex the gib, rather than the whole
gib moving up and down? i.e., if I put an indicator on the gib relatively far away from the eccentrics and lock and unlock the gib, I don't see any movement. But the at the gib lock location I see .006-.010" of movement when locked/unlocked.
So in terms of adjusting the gib, my questions
- to adjust the travel of the eccentric, does the whole gib have to come off? Or possibly when the eccentric shaft is removed, the screw (part no 8369) might be accessible from below to adjust?
- the setscrews loosened from below drop the gib, in concert with tightening the fixed screws (two from below and one from above).
It would seem to make sense that the procedure to adjust the gib ought to be possible without removing the ram.
I've scraped about .001" from the column top (ram making surface), and probably an equal amount from the ram bottom, and I'll also need to scrape some of the guiding way dovetail on both ram and column... so I am assuming the gib will need adjustment.
Thanks,
Phil
I'm scraping in a VN22LU, and have scraped the top of the column (bearing surface
for the ram).
Has anyone adjusted the ram gib on these machines?
Mine looks mostly like this in the manual:
The gib looks like this on the machine, it is a double-angle type:
The underside toward the front looks like:
From the top through the gib, you can only see 5 screws-- in the front, a SHCS accessible
from the top, then the gib locks (front and back) and two 1/2-13 screws that attach from the
bottom.
So it looks like manual isn't quite accurate... from below it looks like there is the eccentric gib lock (largest feature seen from inside), then the 1/2-13 screw accessible from below, and then a setscrew.
The same is replicated at the rear:
This one also shows the ram pinion mechanism, but has the same eccentric clamp and screw/setscrew arrangement.
One other interesting point... The gib lock seems to flex the gib, rather than the whole
gib moving up and down? i.e., if I put an indicator on the gib relatively far away from the eccentrics and lock and unlock the gib, I don't see any movement. But the at the gib lock location I see .006-.010" of movement when locked/unlocked.
So in terms of adjusting the gib, my questions
- to adjust the travel of the eccentric, does the whole gib have to come off? Or possibly when the eccentric shaft is removed, the screw (part no 8369) might be accessible from below to adjust?
- the setscrews loosened from below drop the gib, in concert with tightening the fixed screws (two from below and one from above).
It would seem to make sense that the procedure to adjust the gib ought to be possible without removing the ram.
I've scraped about .001" from the column top (ram making surface), and probably an equal amount from the ram bottom, and I'll also need to scrape some of the guiding way dovetail on both ram and column... so I am assuming the gib will need adjustment.
Thanks,
Phil