This unit has a 5/8"-11 inch Spindle for use with common grinding accessories.
Discount Details
- The promo code 290240 must be entered on the Shopping Cart page.
- To qualify for this offer, your order subtotal must equal $250 or more. Excludes gift cards, free item offers, warranties, Advantage memberships, tax, & shipping.
- Promo code not valid on prior purchases or on Honda & Stihl products, and cannot be combined with other promotional offers.
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- Limited time offer. Subject to change without notice.
Milwaukee M18 FUEL 4-1/2in./6in. Handheld Concrete Grinder, Paddle Switch, Bare Tool, Model# 3670-20

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Offer: FREE Milwaukee M18 Battery with Purchase of a Qualifying M18 FUEL Tool See Details
Shipping:
Available nowStore Pickup:
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- 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.
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Description
Key Specs
Reviews
Q & A
Warranty
Compare
Product Summary
What's Included
- (1) Grinder
Features + Benefits
- 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
Key Specs
| Attribute | Specification |
|---|---|
item# | 6148233 |
Brand | Milwaukee |
Manufacturer's Warranty | 5 year limited warranty |
Ship Weight | 6.8 LB |
Wheel Diameter | 6 in |
Volts | 18 |
| Attribute | Specification |
|---|---|
Cordless | Yes |
Battery Type | Lithium-ion |
Product Category | Concrete Power Tools |
Batteries Included | No |
Dimensions L x W x H (in.) | 14.75 x 3.0 x 4.5 in |
Product Weight | 5.3000 lb |
Reviews
Questions & Answers
Questions
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· 3 months ago
What size arbor hole does this grinder have?
1 answer-
ProductExpert5· 3 months ago
Helpful?
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· 5 months ago
I need 3 charging stations for this grinder. What do you suggest?
1 answer-
ProductExpert12· 5 months ago
Please see items 40529, 114210, and 6599931 for compatible chargers that can charge three or more M18 batteries at one time.
Helpful?
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· 5 months ago
What battery does this take
1 answer-
ProductExpert12· 5 months ago
This grinder is compatible with M18 batteries. Item 6650768 is the recommended battery and charger kit for this tool.
Helpful?
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· 9 months ago
So can this run a 4.5in or 6in wheel?
1 answer-
ProductExpert6· 9 months ago
The grinder is designed to handle both 4.5" and 6" wheels.
Helpful?
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· a year ago
Does this tool come with a battery?
1 answer-
ProductExpert12· a year ago
This grinder does not include a battery or charger. Item 6650768 is the recommended battery and charger for this tool.
Helpful?
-
Warranty
Manufacturer's Warranty
5 year limited warranty
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Milwaukee M18 FUEL 4-1/2in./6in. Handheld Concrete Grinder, Paddle Switch, Bare Tool, Model# 3670-20
Item # 6148233
$279.00Shipping:
Available nowStore Pickup:
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- $299.00
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Free shipping (lower 48 states) - Available nowStore Pickup:
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- $159.02
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Free shipping (lower 48 states) - Available nowStore Pickup:
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- $349.00
Shipping:
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Estimated to ship 10/29/26Store Pickup:
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Specifications
6 in
9 in
4.5 in
9 in
18
120
20
18
Yes
No
Yes
Yes
Lithium-ion
-
Lithium-ion
Lithium-ion
Concrete Power Tools
Concrete Power Tools
Power Tools Regular
Power Tools Regular
No
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14.75 x 3.0 x 4.5 in
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3.41 x 22.31 x 5.68 in
5.3000 lb
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11.9500 lb
-
15
-
-
-
5/8 in
-
5/8 in
-
9 ft
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-
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6,500 rpm
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-
-
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No
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