Adjusting Blade Tension; Tracking The Blade - Delta 28-255 Instruction Manual

ADJUSTING
B L A D E TENSION
DISCONNECT MACHINE F R O M P O W E R SOURCE.
On the back of the upper wheel slide bracket, there is a
series of graduations. These indicate the proper tension
for various widths of blades. With the blade on the
wheels, turn the knob (A) Fig. 40, to raise or lower the
wheel, until the red fiber washer (B) is in line with the
proper graduation for the size of blade being used.
The graduations will be found correct for average work,
and are not affected by rebrazing of the saw blade. We
urge you to use these graduations until you have
become familiar enough with the operation of the Band
Saw to vary the tension for different kinds of blades or
work. Over-straining is a common cause of blade break-
age and other unsatisfactory blade performance. Re-
lease the tension when the machine is not in use.

TRACKING THE BLADE

DISCONNECT MACHINE F R O M P O W E R SOURCE.
IMPORTA N T:Before tracking the blade, make sure the
blade guides and blade support bearings are clear of the
blade so as not to interfere with the tracking adjustment.
A fter tension has been applied to the blade, revolve the
wheels slowly forward by hand and watch the blade (A)
Fig. 41, to see that it travels in the center of the upper
tire. If the blade begins to creep toward the front edge,
loosen the wing nut (B) Fig. 42, and tighten the thumb
screw (C). This will tilt the top of the wheel toward the
back of the machine and will draw the blade toward the
Fig. 41
center of the tire. If the blade creeps toward the back
edge, turn the thumb screw in the opposite direction.
Adjust the thumb screw (C) F i g . 4 2 , o n l y a f r a c t i o n o f a
t u r n a t a t i m e . N E V E R T R A C K T H E B L A D E WHILE
THE MACHINE I S RUNNING. A fter the blade is tracking
in the center of the tires, tighten the wing nut (B) F i g . 4 2 .
16
Fig. 40
Fig. 42
C