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Milwaukee 3670-20 M18 FUEL 4-1/2"-6" Grinder W/ 48-59-1861 M18 18V Starter Kit
Factory Authorized Dealer
Authorized for Milwaukee, DeWalt, Makita, Bosch, Festool. Never gray-market.
Full Manufacturer Warranty
Every tool is covered by the full factory warranty and serviced through authorized service centers.
Free Shipping Over $99
Order by 3PM CT for same-day shipping. Ships from US warehouses.
30-Day Money-Back Guarantee
Return any unused tool in original packaging within 30 days for a full refund.
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Mon–Fri 7AM–7PM CT • Sat 8AM–4PM CT
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Genuine OEM Parts & Accessories
Replacement parts and accessories sourced direct from the manufacturer.
Milwaukee 3670-20 Description
The MILWAUKEE M18 FUEL 4-1/2" / 6" Braking Grinder Paddle Switch, No Lock is the next advancement in power and performance, generating 13A corded power, fastest cutting, and delivering up to 135 cuts per charge. The M18 FUEL 4-1/2" / 6" Braking Grinder generates 13A corded power allowing you to complete the toughest grinding and cutting applications, all on the M18 Cordless System. The POWERSTATE Brushless Motor delivers maximum sustained power and 9,000 RPM to remove material faster and increase productivity. REDLINK PLUS Intelligence ensures unmatched levels of performance, protection, and compatibility. The RAPIDSTOP Brake provides stop times under 2 seconds with an abrasive disc. The M18 FUEL 4-1/2" / 6" Braking Grinder includes an electronic clutch for kickback protection, as well as overload protection to maximize motor life. Pair with the M18 REDLITHIUM FORGE XC8.0 Battery Pack for HIGH OUTPUT HD12.0 power in a smaller size, and longest life vs. REDLITHIUM batteries. The M18 FUEL 4-1/2" / 6" Braking Grinder takes cordless grinders to the next level in performance and run-time.
Milwaukee 3670-20 Includes
- (1) M18 FUEL 4-1/2" / 6" Braking Grinder Paddle Switch
- (1) 48-59-1861 M18 18V Lithium-Ion High Output Starter Kit with FORGE 6.0Ah Battery and Rapid Charger
- (1) Spanner Wrench
- (1) Type 27 Guard
- (1) Type 1 Guard
- (1) Side Handle
Milwaukee 3670-20 Features
- POWERSTATE Brushless Motor: Delivers 9,000 RPM to provide the power to complete the toughest grinding and cutting applications.
- M18 REDLITHIUM FORGE XC8.0 Battery Pack delivers you HIGH OUTPUT HD12.0 power in a smaller size and the longest life vs. REDLITHIUM batteries.
- RAPIDSTOP Brake stops most wheels in less than 2 second
- Electronic Clutch for Kickback Protection
- REDLINK PLUS Intelligence: Most advanced system of electronics in the industry, enabling communication between batteries and tools, allowing for unmatched levels of performance, protection, and compatibility.
- Overload Protection to Maximize Motor Life
- Anti-Vibration Side Handle for Reduced User Fatigue
- Steamlined Handle Grip Size for Increased Control and Ease-Of-Comfort
- Paddle Switch Design for Increased Comfort and Ease-Of-Use when Operating in Various Positions
- 5/8"-11 Spindle for use with common grinding accessories
- Compatible with all M18 batteries
Milwaukee 3670-20 Specifications
| Powered Tool Power Source: | Electric - Cordless |
| Grinder Type: | Angle |
| Maximum RPM: | 9000 |
| Arbor Size: | 5/8 -11 UNC |
| Length (in): | 14.75 |
| Housing Material: | Glass Filled Nylon, Aluminum |
| Color / Finish: | Black, Gray, Red |
| Variable Speed: | No |
| Grinder Switch Type: | Paddle |
| Side Handle: | Yes |
| Product Storage Included: | No Case Included |
| Net Tool Weight (lbs): | 5.30 |
| Number of Batteries Required: | 1 |
| Number of Batteries Included: | 0 |
| Battery Voltage (V): | 18 |
| Charger Included: | No |
| Wheel Diameter (in): | 6.0 |
| Handle Type: | Straight |
| Overload Protection: | Yes |
| Spindle Lock: | Yes |
| UL Listed: | Yes |
| Manufacturer Warranty: | 5 Year Limited Warranty |
| Voltage | 18V |
|---|---|
| Power Source | Cordless — Lithium-Ion |
| Manufacturer Part Number | 807924 |
| Brand | Milwaukee |
| Tool Type | Small Parcel |
| Shipping Weight | 7230 g |
| Condition | New — factory sealed, US-spec unit |
| Warranty | Full Manufacturer Warranty |
Specifications are supplied by the manufacturer and may change without notice. Verify critical dimensions before ordering — or call 1-800-555-0199 and we will confirm.
- Tool
- 2x 5.0Ah batteries
- Rapid charger
- Side handle
- Hard case
- Operator's manual
Everything listed above is included in the box. Items shown in photos but not listed are sold separately.
Full Manufacturer Warranty
All products sold by [STORE NAME] are brand-new, factory-sealed units covered by the manufacturer's full warranty. Warranty length varies by manufacturer and tool line — typical coverage is 3 years on cordless power tools, 5 years on batteries, and lifetime on hand tools.
We are a factory authorized dealer, so your warranty is honored at any authorized service center nationwide. Gray-market and refurbished units carry no such coverage — we do not sell them.
30-Day Money-Back Guarantee
Return any unused tool in original packaging within 30 days for a full refund.
Service & Support
Questions about warranty coverage or service centers? Call 1-800-555-0199 — Mon–Fri 7AM–7PM CT • Sat 8AM–4PM CT.
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Contractor & Bulk Pricing
Outfitting a crew or a fleet? Get volume pricing, Net-30 terms and a dedicated rep.
Volume Discount Tiers
| Quantity (same model) | Discount off our price | Terms available |
|---|---|---|
| 5–9 units | Quoted per order | Credit card / PayPal |
| 10–24 units | Quoted per order | Net-30 on approval |
| 25+ units / fleet program | Quoted per order | Net-30, PO, dedicated rep |
Discounts vary by manufacturer and are subject to MAP policy. Submit the form for a written quote, usually returned within one business day.