The Ryobi cordless grinder is part of Ryobi’s 18V ONE+ system (or 40V for some models), offering cordless convenience for grinding, cutting, and sanding tasks. Here’s a breakdown of popular models and key features:
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1. Ryobi 18V ONE+ Cordless Angle Grinders
– Models:
– P421 (4½”, Brushless) – Compact, efficient, tool-free guard adjustment.
– P423 (5″–6″, Brushless) – More power for heavy-duty tasks.
– P451 (4½”, Brushed Motor) – Budget-friendly, good for light/medium use.
– Features:
– Battery compatibility with all Ryobi 18V tools.
– Adjustable guard and side handle for safety.
– Brushless motors (on P421/P423) for longer runtime and durability.
2. Ryobi 40V HP Cordless Angle Grinder
– Model: RAG4040 (4½” or 5″)
– Features:
– Higher power (40V) for demanding jobs.
– Brushless motor + advanced cooling system.
Pros & Cons
| Pros | Cons |
|——|——|
| ✅ No cords = portability | ❌ Less power than corded grinders |
| ✅ ONE+ battery ecosystem | ❌ Battery drains fast under heavy use |
| ✅ Affordable vs competitors | ❌ Brushed motors wear faster |
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Best Use Cases
– Light/medium grinding, cutting metal, tile, or concrete.
– DIY projects, automotive work, or jobsite tasks where outlets aren’t available.
Accessories to Consider
– High-capacity batteries (4Ah+ recommended).
– Diamond blades (for masonry) or cutting discs (for metal).
Alternatives
– For more power: Milwaukee M18 Fuel or DeWalt FlexVolt grinders.
Would you like help choosing a specific model based on your needs?