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MAKITA GA4542C SJS II 12 Amp 4-1/2 in. High-Power Angle Grinder
4-1/2" SJS™II High-Power
Angle Grinder
POWER : Powerful 12.0 AMP motor
delivers more output and variable (2,800 - 11,000) RPM
DURABILITY : Electronic
Controller is a three-part electronic feature designed to provide power and
durability
COMFORT : SJS™II technology is a
leaf spring and cam gear drive mechanism engineered to reduce vibration
VERSATILITY : Variable speed
control dial enables user to match the speed to the application
INCLUDES : Grinding wheel, wheel
guard, side handle, inner flange, lock-nut and wrench
The Makita 4-1/2” SJS™II High
Power Angle Grinder (GA4542C) combines power, convenience, comfort and
motor-protection features for longer-lasting industrial performance. It is
ideal for cutting, grinding ferrous metal, paint and rust removal, shipyard maintenance,
metal polishing, general steel grinding, auto repair work, cutting brick and
masonry, restoration work, and more.
The GA4542C is equipped with
SJS™II, a mechanical gear drive system to help prevent motor and gear damage by
dampening the force on the gear when the wheel is forced to stop. SJS™II is
also features a leaf spring and cam gear drive mechanism that is engineered to
reduce vibration for increased operator comfort during extended use.
The 12 AMP motor delivers
2,800-11,000 RPM for versatility and maximum productivity. Labyrinth
construction protects the motor with a complex set of channels, prohibiting
dust and contamination from entering the motor. Additional protection features
include a zig-zag epoxy applied to both sides of the armature coil, and a
powder-coating to the field. This forms a barrier under rotation and is
engineered to protect from dust and debris penetration for longer tool life
Features
- Powerful 12.0 AMP motor delivers
more output and variable (2,800 - 11,000) RPM
- SJS™II provides a leaf spring and
cam gear drive mechanism that is engineered to reduce vibration for increased
operator comfort during extended use
- Vibration absorbing side handle
provides increased comfort on the job
- Electronic controller provides
constant speed control which automatically applies additional power to the
motor to maintain speed under load
- Electronic controller provides
soft start which suppresses start-up reaction for smooth start-ups and longer
gear life
- Electronic controller provides an
electronic current limiter which helps protect the motor from overload in high
torque applications
- Variable speed control dial
enables user to match the speed to the application
- Labyrinth construction seals and
protects the drive gear and bearings from dust and debris for increased
durability
- Motor fan is designed with
enlarged fins for increased air flow and a cooler running motor
- Complete zig-zag epoxy is applied
to both sides of the armature coil and a powder coating to the field for
protection from debris and longer tool life
- Spiral bevel gears for smoother
rotations and a more efficient transfer of energy
- Fully aluminum constructed gear
housing provides superior gear alignment and smooth transmission for increased
durability and comfort
- "Tool-less" wheel guard
for easy adjustment
- Slide switch with lock-on for
continuous use
Includes
(1) Inner Flange (224399-1)
(1) Lock Nut Wrench (782412-6)
(1) 4-1/2" Grinding Wheel
(A-95956)
(1) 4-1/2" Wheel Guard
(123144-0)
(1) Side Handle (162258-0)
(1) Lock Nut (224568-4)
Specifications
|
Wheel Diameter : |
4-1/2" |
|
AMPS : |
12 |
|
No Load Speed (variable speed) : |
2,800 - 11,000 RPM |
|
Spindle Thread : |
5/8" - 11 UNC |
|
Lock-On : |
Yes |
|
Lock-Off : |
No |
|
Overall Length : |
11-7/8" |
|
Net Weight : |
5.4 lbs. |
|
Variable speed control dial : |
Yes |
|
Power Type : |
Corded |

| Availability | In Stock |
|---|---|
| Manufacturer | MAKITA |
| Manufacturer Sku | GA4542C |













