JULY. 1983
NO. 275J.
BALDOR
REPLACES 275H
INSTRUCTION MANUAL FOR BALDOR GRINDERS
CAUTION
For Your Own Safety Read Instruction Manual Before Operating Grinder
ANY ACCESSORIES OR ATTACHMENTS ADDED TO THIS GRINDER MAY INTRODUCE HAZARDS USE WHEELS MARKED AT
OR OVER RPM OF THIS GRINDER (See table below)
NO LOAD
GRINDER
ARBOR
SPEED ON
WHEEL SIZE
SIZE
NAMEPLATE
6"
1/2"
1800
6"
1/2"
3600
7"
5/8"
1800
7"
5/8"
3600
8"
3/4"
1800
8”
3/4”
3600
10”
7/8”
1800
REPLACE CRACKED WHEEL IMMEDIATELY ALWAYS USE GUARDS AND EYESHIELDS. DO NOT OVERTIGHTEN WHEEL NUT
USE ONLY FLANGES FURNISHED WITH THIS GRINDER.
Always disconnect grinder from the power supply while motor is being connected, or reconnected.
AS WHEELS WEAR ADJUST TOOL REST SUPPORT TO MAINTAIN APPROXIMATELY 1/16 CLEARANCE BETWEEN TOOL REST
AND WHEEL GRIND ON PERIPHERY OF WHEELS ONLY.
INSTALLATION
Check grinder nameplate to make certain the rating is correct for the power supply. voltage and frequency.
Mount grinder on solid bench It may be used without bolting down for light work. For heavy work it should be bolted down to the
mounting surface. If mounted on pedestal. bolt grinder securely to pedestal and bolt pedestal to floor
The spark arrestor should be adjusted to 1/16" clearance to the wheel.
Adjust tool rest on support to desired position and tighten nut securely. Adjust tool rest support on guard to obtain approximately 1/16
clearance between tool rest and wheel and tighten nut securely.
Adjust eyeshields to position aligning center of eyeshield in line of sight to tool rest
Single phase grinders with wheels up to 8 diameter are equipped with cord and grounding type plug Some single phase grinders are
rated dual voltage
They will be connected at the factory for 115 volts unless otherwise noted.
Use Instructions provided to reconnect for a different voltage
All attachment plugs and any receptacles shall be replaced with devices rated for the voltage for which the motor is reconnected.
Three phase grinders are dual voltage and are reconnectable for the proper voltage in the conduit box, using instructions provided.
Connect phase sequence for clockwise rotation when viewed from the outside of the left hand wheel.
After making connections make sure they are secured and properly insulated
When starting a grinder for the first time, or after installing a replacement wheel, it is most important that the operator stand aside for at
least one minute.
This is the correct practice since grinding wheels can explode if they have received minor cracks from shipping.
OPERATION
Check that switch is on “OFF” position and that wheels rotate freely. Insert plug into receptacle and turn on switch. Grinder should
come up to speed smoothly and without vibration.
As grinding wheel wears, periodically adjust spark arrester to maintain 1/16 clearance to wheel.
Also adjust tool rest supports as grinding wheels wear to maintain approximately 1/16 clearance between tool rest and grinding wheel.
Grind on periphery of wheels only.
MAINTENANCE
No maintenance other than replacement of worn wheels is needed. Wheels should be replaced after the diameter is reduced to 2”
below original size.
The ball bearings used are lubricated for life and do not require additional lubrication.
Wipe off and dispose of grinding dust to prevent accumulation
SAFETY INSTRUCTIONS
A. GROUNDING INSTRUCTIONS
1.
All grounded, cord-connected tools
In the event of a malfunction or breakdown, grounding provides a path of least resistance for electric current to reduce the risk of
electric shock. This tool is equipped with an electric cord having an equipment-grounding conductor and a grounding plug. The plug
must be plugged into a matching outlet that is properly installed and grounded in accordance with all local codes and ordinances.
