Mittler Bros Machine & Tool 400-VSUADJ - Manual (Page 15)

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GIB REPLACEMENT
1. Mount right side lower steel gib with 5/16” x 18 x 1” long socket head screws (steel gib
with holes drilled on bottom, plus 2 holes on side). NOTE: Cap screws enter from under
base plate.
2. Insert 2 steel dowel pins into right lower gib and drive pins into gib and base plate.
3. Tighten 5/16” x 18 x 1” socket head screws on right lower gib.
4. Install Left side lower steel gib with 5/16” x 18 x 1” long socket head screws – DO NOT
TIGHTEN.
5. Slide on 6” x 6” plate with bronze gibs attached – Note: Locate 2 holes on 6”x 6” block to
the back of the unit for gib guard.
6. Thread right-hand acme screw into upper bronze nut for left-to-right movement.
7. Thread left-hand acme screw into lower bronze nut for in-to-out movement.
8. Install front bushing block onto bronze bushing of lower acme screw - bolt onto 1” thick
base plate.
9. Install front bushing block onto upper bronze nut of upper acme screw and bolt onto
underside of base plate.
10. Install bronze thrust washer on acme screw shafts.
11. Install key stock into slot on shafts.
12. Install round hand wheel on upper and lower acme screws and tighten Nylok nut until it
bottoms, then back off ¼ turn.
13. Install 3/8” x 16 x 3” long set screws (2) into right side of lower steel gib.
14. Snug up Left side lower steel gib 5/16” x 18 x 1” socket head screws.
15. Turn clockwise each adjusting screw, on the back side of the vise mounting plate, this will
“spread & tighten” the gibs.
Make very small adjustments at a time!
After making an
adjustment turn the hand wheel and run through the entire range of travel feeling for
smooth and snug movement. If it seems too tight, back the adjusting screws off a very
small amount and tap the gib opposite the adjusting screws with a soft head hammer and
repeat the process.
#15, Motor side
#4, Motor side #15, Adjusting
Screws
#15, Vise
Mounting Plate
#19, Gib Guard