Foredom 5 High Speed - Manual (Page 2)

Installation
Your Foredom High Speed Bench Grinder can be used almost anywhere, but the
motor should not be enclosed or confined so as to restrict air circulation. Two
holes are provided in the base casting if you wish to fasten your grinder to your
bench. Be sure the switch/speed control knob is in the off position (turned
counterclockwise as far as it will go) before you plug in the power cord. Check
the nameplate of your grinder to be sure the motor voltage matches the voltage
you are using. Attach the tapered spindle TM-3 and wheel mandrel, which come
with the No. 1 and No. 5 Bench Grinder, to the left and right motor shafts. Make
sure that the set screws are on the flat part of the motor shaft as close to the
motor as possible; and that the set screws are tight.
Operation
The Model No. 1 Grinder produces no load speed up to 15,000 RPM, controlled
by an electronic speed control which is manually adjusted. The on/off switch and
speed control are operated by the knob on the front of the motor base. To shut
the motor off, turn the knob counterclockwise as far as it will go. You will hear the
switch click as it goes into the off position. The Model No. 5 Grinder is similar to
the No. 1 except the speed is adjusted by a foot control. This model does not
have an off/on switch. Please keep in mind that both grinders accomplish their
work through high speed rather than high torque; therefore you should use the
lightest pressure possible. With a light touch you will avoid unnecessary tool
marks, rapid wear of the tool, and overheating of the motor.
Service
Your Foredom High Speed Bench Grinder is equipped with a ball bearing motor,
and requires no lubrication. However, we recommend that you keep a spare set
of motor brushes, Part No. 229P. The motor brushes should be checked periodi-
cally for wear. When new they are approximately 1/2
″ long. They should be
replaced when they have worn to 1/4 ″. To remove the brushes, simply unscrew
the brush caps. When replacing them, be sure that the contour of the brush
matches the armature. The motor and base should be kept as clean and free of
dust, grease, and dirt as possible.
The electronic control mounted in the base of the Model No. 1 High Speed Bench
Grinder contains a specially designed electronic circuit, and service on this
component should be performed only by the factory. Factory repairs are made
promptly and at reasonable cost. If it is not convenient to arrange for service
through your dealer, you may send your equipment directly to the factory marked:
“Attention: Service Department.” Estimates on repairs are given promptly when
requested.
Important: When ordering spare parts, please be sure to give all the
data on the nameplate located on the motor.
Always Wear Eye Protection While Using Bench Grinder.
The High Speed Bench Grinder Models No. 1 and 5
come with the following accessories:
Tapered Spindle (Part No. TM-3) – Precision spindle suitable for use
with cotton, felt, or chamois buffs with shellac hardened or lead centers
on left side of grinder. Also used with inside ring buffs on wooden
mandrels. Fits 1/4
″ diameter straight motor shafts. Optional TM-4 is
tapered spindle for use on right side of motor.
Cotton Buff (Part No. CB-1) – 2 1 / 2
″ diameter buff for polishing and
buffing. May be used with jeweler’s rouge, tripoli, etc. It must be used on
the TM-3 tapered spindle on the left side of the grinder. Maximum speed
rating: 25,000 RPM.
Aluminum Oxide Grinding Stone on Wheel Arbor (Part No. 10072) –
1
3 /
4
″ diameter 80 grit stone for general grinding, sharpening edged tools,
etc. Maximum speed rating: 17,000 RPM.
Optional Accessories
Only use accessories rated for 15,000 RPM or higher. The following are
available from Foredom.
Felt Buff (Part No. W305) – 2 ″ diameter buff ideal for polishing gem
stones, metals, etc. Maximum speed rating: 25,000 RPM.
Rubber Bonded Abrasive Wheel (Part No. W306) – 1 1 /
2
″ diameter
wheel available in coarse, medium, or fine grit. Excellent for rust,
corrosion, and scratch removal, and preparation of all metal surfaces
for polishing and buffing. Maximum speed rating: 17,000 RPM.
Steel Wire Brush (Part No. W302) – 2 ″ diameter brush with .008″ thick
wire for cleaning, brushing, and texturing metal surfaces. Can be
operated at high speed. Maximum speed rating: 20,000 RPM.
Tampico Fiber Brush (Part No. W303) – 2 ″ diameter brush with an
unusual ability to hold abrasive compounds. Good for wet cleaning, chip
removal, dulling a satin finish, or fine burr removal. Maximum speed
rating: 20,000 RPM.
Nylon Brush (Part No. W304) – 2 ″ diameter brush with .010″ thick
filaments that resist attack by most acids and alkalis, heat, and
abrasion. Excellent for wet scrubbing, cleaning, and slurry abrasive
finishing. It is also used extensively for fabric scrubbing, glass and bottle
cleaning, and plastic burr removal. Max. speed rating: 20,000 RPM.