6
EXTENSION CORDS
Use proper extension cords. Make sure
your extension cord is in good condition and is a 3-wire
extension cord which has a 3-prong grounding type
plug and matching receptacle which will accept the
machine’s plug. When using an extension cord, be sure
to use one heavy enough to carry the current of the
machine. An undersized cord will cause a drop in line
voltage, resulting in loss of power and overheating. Fig.
C shows the correct gauge to use depending on the
cord length. If in doubt, use the next heavier gauge. The
smaller the gauge number, the heavier the cord.
Fig.C
MINIMUM GAUGE EXTENSION CORD
RECOMMENDED SIZES FOR USE WITH STATIONARY ELECTRIC MACHINES
Ampere
Total Length
Gauge of
Rating
Volts
of Cord in Feet
Extension Cord
0-6
120
up to 25
18 AWG
0-6
120
25-50
16 AWG
0-6
120
50-100
16 AWG
0-6
120
100-150
14 AWG
6-10
120
up to 25
18 AWG
6-10
120
25-50
16 AWG
6-10
120
50-100
14 AWG
6-10
120
100-150
12 AWG
10-12
120
up to 25
16 AWG
10-12
120
25-50
16 AWG
10-12
120
50-100
14 AWG
10-12
120
100-150
12 AWG
12-16
120
up to 25
14 AWG
12-16
120
25-50
12 AWG
12-16
120
GREATER THAN 50 FEET NOT RECOMMENDED
FOREWORD
FUNCTIONAL DESCRIPTION
The Delta ShopMaster Model GR450 is an 8" Variable Speed Grinder. This model comes with a flexible lamp, adjustable
tool rests, buffing wheel, quick release arbor nut system, and two large eye shields for added safety.
UNPACKING AND CLEANING
Carefully unpack the machine and all loose items from the shipping container(s). Remove the protective coating from
all unpainted surfaces. This coating may be removed with a soft cloth moistened with kerosene (do not use acetone,
gasoline or lacquer thinner for this purpose). After cleaning, cover the unpainted surfaces with a good quality household
floor paste wax.
NOTICE: The photograph on the manual cover illustrates the current production model. All other illustrations
contained in the manual are representative only and may not depict the actual color, labeling, or accessories
and are intended to illustrate technique only.
