Cincinnati 1a lo - Page 13

SERVICE MANUAL AND PARTS LIST CATALOG
ADJUSTMENTS
FIGURE 12
Headless Type Gib
To Adjust Gibs (See Figure 12)
Headless type taper gibs are provided to compen
sate for wear of bearing surfaces between sliding
elements at knee and column; knee and saddle;
saddle and table. Keep these surfaces clean and
lubricated to cut down wear.
Move slide, to be adjusted by hand, turn gib ad
justing screw in until movement of slide feels tight
then back off screw until movement is just snug
with a slight drag.
CAUTION — Too tight an adjustment of the gibs
squeezes out the oil film, causing undue wear and
scoring.
To Adjust Drive Belts: Styles 1-A, 1-B
(See Page 28.)
Styles 1-A and 1-B machines are driven through a
V-belt and step pulleys which transmit motor
torque to the drive sleeve through a jack shaft and
timing belt. To tighten the V-belt (3B), turn
knurled knob (43B). To tighten timing belt (9B),
loosen two socket head screws (33B), move V-belt
housing (19B) back until belt is tight and retighten
the socket head screws. When belt can be de
pressed 1/2" (midway between shafts), adjustment
is correct. [If timing belt is noisy, it is too tight.
When properly adjusted, the timing belt runs
quietly.]
To Adjust Drive Belt: Style 1-E
(See Page 56.)
Drive belt (130B) is tightened or loosened by turn
ing knurled knob (101B). Loosen two hex nuts
(133B) before adjusting belt. Tighten hex nuts
after adjusting belt. When belt can be depressed
1/2" (midway between shafts), adjustment is cor
rect.
To Adjust Backlash Eliminator
(See Page 70.)
Lunging table movements while climb milling
would indicate that backlash (B/L) eliminator nuts
are loose or worn and need adjusting.
1. Run table to extreme left position so lead
screw nuts are most accessible.
2. Loosen two socket head screws (82B) and, by
hand only, turn B/L eliminator nut (80B)
clockwise, then tighten screws (82B) while
holding B/L nut. The two screws (82B) can
be placed in either set of two holes in nut
(79B) that are 90° apart.
To Adjust Quill Powerfeed Clutch:
Style 1-B (See Page 34.)
If powerfeed to quill should slip during a normal
cut, it should be adjusted as follows:
1. Drain oil from vertical head, unscrew knurled
knob (175B) at left side of head and remove
six screws holding cover plate (123B,page 32)
from side of head. Remove cover plate.
2. Loosen set screw in adjusting collar (178B),
tap to loosen shoe under it and rotate collar
in a clockwise direction until it is within
0.010" of the front face of male friction clutch
(181B). [Or, run collar tight against friction
clutch and back it off 1/5 of a turn on the 5/8-
18 fine threads of pinion shaft. ]
As hand clutch knob is turned clockwise, it
will push adjusting pins (177B) against friction
clutch and force clutch into spiral gear (182B)
to produce drive to quill.
To Adjust Shaping Attachment Drive Belt
(See Page 96.)
Loosen the three cap screws that attach motor
mounting plate (39B) to belt housing and tighten
knurled knob (48B) until belt (44B) can be sagged
between sheaves about one-half its thickness by
finger pressure.
To Adjust Shaping Attachment Gib
(See Pages 96, 98.)
Slightly loosen bottom gib screw and tighten top
gib screw (104B) until movement of slide (8B) is
felt to be snug as drive belt is pulled over by hand.
= 12