Adjusting Upper Blade Guide Assembly; Adjusting Upper Blade Guides And Blade Support Bearing - Delta 28-255 Instruction Manual

ADJUSTING UPPER BLADE
GUIDE A S S E M B LY
DISCONNECT MACHINE F R O M P O W E R SOURCE.
The upper blade guide assembly (A) Fig. 43, should
always be set as close as possible to the top surface of
the material being cut by loosening lock knob (B) and
moving the guide assembly (A) to the desired position.
The upper blade guide assembly should also be adjust-
ed so that the blade guides (A) F i g . 4 4 , a r e f l a t w i t h t h e
blade. If an adjustment is necessary, loosen screw (B)
and rotate the complete guide assembly (C) until the
blade guides are flat with the blade.
ADJUSTING UPPER BLADE
GUIDES AND BLADE
SUPPORT BEARING
DISCONNECT MACHINE F R O M P O W E R SOURCE.
The upper blade guides and blade support bearings are
adjusted only after the blade is tensioned and tracking
properly. To adjust proceed as follows:
1 . The upper blade guides (A) Fig. 45, are held in place
by means of the set screws (B). Loosen the set screws
(B) to move the guides (A) as close as possible to the
side of the blade, being careful not to pinch the blade.
Then tighten the screws (B).
2 . The guides (A) Fig. 45, should then be adjusted so
that the front edge of the guides are just behind the
g u l l e ts of the saw teeth. The complete guide block
bracket can be moved in or out by loosening thumb
screw (C) and turning knurled knob (D) Fig. 45. When
guides (A) are set properly, tighten thumb screw (C).
3 . The upper blade support bearing (E) Fig. 45, pre-
vents the blade from being pushed too far to the rear
which could damage the set in the saw teeth. The sup-
port bearing (E) should be set 1/64 behind the blade by
loosening thumb screw (F) and turning knurled knob (G)
to move the support bearing (E) in or out.
4 . The blade support bearing (E) should also be adjust-
ed so the back edge of the blade overlaps the outside
diameter of the ball bearing by about 1/16 . The bearing
( E ) is set on an eccentric and to change position remove
screw (H) and bearing (E) Fig. 45. Loosen thumb screw
(F), back out screw (G) and re-position shaft that bearing
( E ) i s a t tached to.
17
Fig. 43
Fig. 44
Fig. 45