Milwaukee M12BPS-421X Polisher Sander
Professional 12V cordless orbital sander with dual-action motor for fast job completion
The Milwaukee M12BPS-421X is a sub-compact battery-powered polisher and orbital sander delivering professional performance in confined spaces. This 12 volt cordless model features a high-performance 4-pole motor with variable 2-speed selection for both polishing and sanding applications, making it ideal for mechanics, detailers, woodworkers, and tradespeople needing precise control in tight areas.
Key Features
- ✔ Variable Speed Control — 2-speed selection from 0–2800 RPM and 0–8300 RPM for optimal performance across polishing and sanding jobs
- ✔ RedLink Overload Protection — electronic system in both tool and battery pack ensures durability and consistent wire-free operation
- ✔ Compact 130mm Design — allows access to hard-to-reach areas and tight corners for detail sanding and polishing work
- ✔ Dual-Action Orbital Sander — 76mm polishing pad and 50mm sanding disc with self-adhesive backing for fast completion
- ✔ Long Run Time — includes 2.0Ah and 4.0Ah RedLithium battery pack for extended cordless polishing and sanding sessions
- ✔ Spindle Lock — tool-free accessory changes for quick pad and sanding disc swaps during work
- ✔ 2-Position Side Handle — detachable rubber overmould grip for control and stability on battery-powered orbital polishing
- ✔ RedLithium Battery Technology — superior pack construction with individual cell monitoring and fade-free performance for long-term reliability
- ✔ M12 System Compatible — works with all Milwaukee M12 batteries and chargers for maximum flexibility across your power tool collection
Technical Specifications
| Specification | Detail |
| Model | M12BPS-421X |
| Brand | Milwaukee |
| Voltage | 12V |
| Power Source | Cordless Battery Powered |
| Tool Type | Orbital Sander / Polisher |
| Action Type | Dual Action |
| Motor Type | 4-Pole Brushed |
| Max Speed (No Load) | 2800 / 8300 RPM |
| Orbits Per Minute | 14,000–26,000 OPM |
| Polishing Pad Size | 76mm |
| Sanding Disc Diameter | 50mm |
| Battery Type | Li-Ion (Lithium-Ion) |
| Battery Capacities Included | 2.0Ah and 4.0Ah |
| Number of Batteries | 2 |
| Charger Included | C12 C Charger (80 min charge time) |
| Tool Weight (with Battery) | 1.45kg |
| Grip Type | Rubber Overmould Grip |
| Side Handle | 2-Position Detachable |
| Case Included | HD Box Dynacase |
| Colour | Red |
| Country of Origin | China |
What's in the Box
- 1 × Milwaukee M12BPS-421X Orbital Sander / Polisher
- 1 × M12 B2 2.0Ah RedLithium Battery
- 1 × M12 B4 4.0Ah RedLithium Battery
- 1 × C12 C Fast Charger
- 1 × HD Box Carrying Case
- Polishing pad, sanding pad, white polishing sponge, yellow polishing sponge, lambswool pad, side handle
Part of the Milwaukee M12 System — This battery-powered compact polisher is fully compatible with all Milwaukee M12 cordless batteries and chargers. Mix and match the 2.0Ah, 4.0Ah, and other M12 battery capacities to extend runtime and versatility across your entire Milwaukee 12V tool range.
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