Bosch GPX 12V-77 Professional Cordless Random Orbital Sander 12V Bare Tool

With a brushless motor and variable speed up to 5,000 rpm, the Bosch GPX 12V-77 Professional delivers cordless freedom for fine sanding on wood, metal, and filler. This 12V random orbital sander combines a 125 mm pad with 2.5 mm orbit for a swirl-free finish, all in a compact, low-vibration body.

Overview

The GPX 12V-77 Professional is part of the Bosch Professional 12V System, powered by any Bosch 12V lithium-ion battery (not included). It features a hook-and-loop pad for quick abrasive changes and a microfilter dust box or vacuum connection for clean working. The ergonomic grip and low vibration of 2.5 m/s² reduce fatigue during extended use.

What stands out

• Brushless motor for longer runtime and durability
• Variable speed from 3,000 to 5,000 rpm for different materials
• Compact and lightweight design for one-handed operation
• Effective dust extraction via microfilter box or vacuum hose
• Low vibration and soft grip for comfortable handling

Technical details

• Battery voltage: 12 V
• No-load speed: 3,000 – 5,000 rpm
• Orbital stroke rate: 6,000 – 10,000 opm
• Sanding pad diameter: 125 mm
• Orbit diameter: 2.5 mm
• Eccentricity: 1.25 mm
• Pad attachment: Hook-and-loop
• Sound pressure level: 70 dB(A)
• Vibration emission: 2.5 m/s²
• Weight: 0.9 kg (without battery)

Our verdict

The GPX 12V-77 Professional is an excellent choice for professionals seeking a cordless random orbital sander that balances power, precision, and portability. Its brushless motor and variable speed make it versatile for fine finishing tasks, while the low vibration ensures comfort. Just add a Bosch 12V battery and charger to get started.