A product feature diagram of the Bosch GWS12-450PBD angle grinder with text labels highlighting its tool-free guard, anti-vibration handle, no lock-on paddle switch, and ultra-compact 11-amp motor.
A close-up action shot of a person wearing protective yellow gloves using the Bosch angle grinder to grind the edge of a thick metal plate, with bright sparks flying from the contact point.
A person using the Bosch 4.5 inch angle grinder to cut through a metal pipe secured in a blue vise, demonstrating the tool's effectiveness in heavy-duty metal applications as sparks are produced.
An action photo showing a person in work gloves operating the corded angle grinder on a metal workbench, highlighting the large no lock-on paddle switch on the underside of the tool.
Why Pros Choose Bosch X-LOCK: Fast, Tool-Free Grinder Wheel Changes | Bosch USA promotional how to video
A product feature diagram of the Bosch GWS12-450PBD angle grinder with text labels highlighting its tool-free guard, anti-vibration handle, no lock-on paddle switch, and ultra-compact 11-amp motor.
A close-up action shot of a person wearing protective yellow gloves using the Bosch angle grinder to grind the edge of a thick metal plate, with bright sparks flying from the contact point.
A person using the Bosch 4.5 inch angle grinder to cut through a metal pipe secured in a blue vise, demonstrating the tool's effectiveness in heavy-duty metal applications as sparks are produced.
An action photo showing a person in work gloves operating the corded angle grinder on a metal workbench, highlighting the large no lock-on paddle switch on the underside of the tool.
Why Pros Choose Bosch X-LOCK: Fast, Tool-Free Grinder Wheel Changes | Bosch USA promotional how to video
BOSCH

Bosch Angle Grinder GWS12-450PBD-RT 4-1/2 Inch 12 Amp (11500 RPM Brake System Reconditioned 120V Variable Speed No Lock-On Paddle Switch Metal)

In stock
SKU: GWS12-450PBD-RT
$119.00 USD

Description

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Bosch GWS12-450PBD-RT 4-1/2 Inch 12 Amp Angle Grinder Reconditioned

The Bosch GWS12-450PBD-RT is a 4-1/2-inch 12.0 Amp corded variable speed angle grinder engineered for fast metal cutting, weld prep grinding, and masonry surfacing. Operating on 120V power, this tool generates a no-load speed of 11,500 RPM through a 5/8"-11 UNC spindle while featuring an integrated rapid brake system that stops grinding wheels quickly upon switch release. Outfitted with KickBack Control, Drop Control impact sensors, soft-start electronics, an anti-vibration side handle, and a non-locking paddle switch, this lightweight 5.29 lb grinder provides precise tool handling across structural steel and masonry materials.

Note: This is a manufacturer-reconditioned tool, certified to look and perform like new.

Best Used For:

  • Structural Steel Cutting & Weld Grinding: Slitting thick steel plates, rebar, and cleaning down heavy weld beads in metal fabrication environments.
  • Masonry Surfacing & Concrete Smoothing: Dressing rough concrete edges, removing coatings, and tuckpointing mortar joints using diamond cup wheels and shrouds.
  • Overhead & Tight-Space Surface Prep: Maneuvering in restricted pipe galleries and narrow structural bays with a low-fatigue 5.29 lb narrow-grip frame.

Key Performance & Safety Features

  • 12.0 Amp High-Output Motor: Generates up to 11,500 RPM no-load speed to maintain high wheel torque under aggressive grinding pressure.
  • Rapid Wheel Brake System: Mechanical friction braking mechanism stops rotating wheels immediately upon releasing the paddle switch.
  • KickBack & Drop Control Sensors: Accelerometers shut off power instantly during sudden wheel bind-ups or if the tool is accidentally dropped.
  • Non-Locking Ergonomic Paddle Switch: Multi-position paddle design enhances grip versatility while preventing accidental continuous motor operation.
  • Vibration Control Side Handle: Specialized shock-absorbing side handle dampens operational chatter to reduce operator hand fatigue.
  • Soft-Start & Restart Protection: Electronic surge limiter prevents startup torque jolts and blocks automatic startup after unexpected power interruptions.

What's Included

  • (1) Bosch GWS12-450PBD-RT 4-1/2" Ergonomic Angle Grinder (Reconditioned)
  • (1) Type A (41/1A) Cut-Off Wheel Guard
  • (1) Type B (27) Grinding Wheel Guard
  • (1) Vibration Control Auxiliary Side Handle
  • (1) Brake System Compatible Backing Flange
  • (1) Spindle Lock Nut
  • (1) Dual-Pin Lock Nut Wrench

Technical Specifications

Brand Manufacturer Bosch® Power Tools
Model Part Number OEM SKU GWS12-450PBD-RT
Condition Rating Grade Factory Reconditioned (Certified Like-New)
Electrical Amperage Capacity 12.0 Amps
Operating Line Voltage 120 Volts AC (60 Hz)
Maximum No-Load Speed 11,500 RPM
Grinding Wheel Diameter 4.500 inches (4-1/2" / 115 mm)
Spindle Arbor Thread Size 5/8" - 11 UNC Spindle
Power Switch Trigger Style No Lock-On Paddle Switch
Speed Control Capability Variable Speed Electronic Dial
Overall Tool Length 12.870 inches (326.9 mm)
Overall Tool Width 10.240 inches (260.1 mm)
Overall Tool Height 4.290 inches (109.0 mm)
Total Bare Tool Weight 5.29 lbs (2.40 kg)

Pro-Tip: Always use the matching brake-compatible backing flange provided with this model; standard aftermarket grinder flanges will not engage the internal mechanical brake assembly properly.