Baldor MN903 Instruction Manual

MN903

No. 275P Replaces 275N

LB7008

Instruction Manual For Baldor Grinders

1

MN903

SAFETY NOTICE:

WARNING statements describe conditions that may lead to personnel injury including potentially fatal injuries if the 

machine is not properly used and warnings are not properly followed.

Caution statements describe conditions that may lead to equipment damage.

Electrical shock can cause serious or fatal injury. Only qualified personnel should install, maintain or troubleshoot 

this equipment.

WARNING:  

Do not operate this grinder until you are sure that you are completely familiar with the safe operation of the 

grinder, all accessories and safety equipment. Improper use can lead to severe injury. This manual defines 

proper use of this equipment. Before using this equipment for any other use, please consult Baldor. Contact 

Baldor if you do not understand any procedure or operation concerning this grinder or this manual.

WARNING:  

Prevent electrical shock hazard and accidental machine operation. Always disconnect grinder from the 

power source before servicing, changing accessories (such as wheels, tool rest, spark arrestor, etc.) or 

before performing maintenance.

WARNING:  

Avoid accidental starting. Make sure switch is in “OFF” position before connecting to power source.

WARNING:  

Be sure the system is properly grounded before applying power. Do not apply power before you ensure that 

grounds are connected. Electrical shock can cause serious or fatal injury. Follow the National Electrical Code 

(NEC) and local codes for the safe installation of this equipment.

WARNING:  

Always use safety glasses with side shields (or full face shield) when operating grinder. Do not use ordinary 

eyeglasses. Also use face or dust mask if cutting operation is dusty. 

WARNING:  

Unsuitable accessories or attachments added to this machine can create hazards. Baldor accessories 

are specifically designed to be used with this grinder. Use accessories or attachments only in the proper 

intended manner. Accessories or attachments obtained from another source may cause hazards. Consult the 

manufacturer before use.

WARNING:  

Keep guards in place and in working order. Guards are design to prevent injury. Never operate this equipment 

if a guard is damaged, missing or improperly installed.

WARNING:  

Remove adjusting keys and wrenches from this product after use. Check to see that keys and adjusting 

wrenches are removed from grinder before turning it on. Projectiles can cause severe injury to yourself or 

others.

WARNING:  

Keep work area clean and well lighted. Clutter and poor lighting invites accidents.

WARNING:  

Don’t use in dangerous environment. Don’t use grinders in damp or wet locations, or expose them to rain. 

Electrical shock can cause serious or fatal injury. Follow the National Electrical Code (NEC) and local codes 

for the safe installation of this equipment.

WARNING:  

Do not wear loose clothing, neckties, rings, bracelets, or other jewelry to get caught in moving parts. Nonslip 

footwear is recommended. Wear protective hair covering to contain long hair.

WARNING:  

Don’t over reach. Keep proper footing and balance at all times. A rotating wheel or belt can catch an article 

of clothing and cause personnel injury.

WARNING:  

Secure work. Use clamps to secure the work piece when practical. It’s safer than using your hand and it 

keeps hands away from wheel.

WARNING:  

When starting a grinder for the first time, or after installing a replacement grinding wheel, it is most important 

that the operator stand aside for at least one minute of rotation at full speed. This is the correct practice 

since grinding wheels can disintegrate if they have received damage during shipping or handling.

WARNING:  

Always have the grinder switch in the “OFF” position when changing the position of the pivot arm. Do not 

attempt to change the pivot arm position while the belt is moving as this will create a hazardous situation for 

the operator.

WARNING:  

Never install a wheel that is damaged, such as a chip or crack on any surface. A damaged wheel can 

disintegrate while rotating at a high RPM or when work is placed against the wheel. This can severely harm 

the operator or others in the area.

WARNING:  

Check damaged parts. Before further use of the grinder, a guard or other part that is damaged should 

be carefully checked to assure that it will operate properly and perform its intended function. Check for 

alignment of moving parts, binding of moving parts, breakage of parts, mounting, and any other conditions 

that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced.

WARNING:  

Use proper extension cord. Make sure your extension cord is in good condition. When using an extension 

cord, be sure it is rated for the voltage and current rating of your product. An undersized cord will cause a 

drop in line voltage resulting in loss of power and overheating. Table 1 shows the correct wire size to use 

depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gauge. The smaller 

the AWG gauge number, the heavier the cord.

WARNING:  

Dust created during grinding, sawing, power sanding, drilling, and other activities may contain chemicals 

known to the State of California to cause cancer, birth defects or other reproductive harm.

WARNING:  

Keep children and visitors away. Remove starter keys turn off master switches. Padlock equipment or work 

area when not in use.

WARNING:  

Never leave grinder running unattended. Always turn power off after use.

Caution:  

Don’t force grinder. It will do the job better and safer at the feed rate for which it was designed.

Caution:  

Use right tool. Don’t force tool or attachment to do a job for which it was not designed.

Caution:  

Maintain grinder with care. Keep grinder clean for best and safest performance.