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Milwaukee M12 FUEL 5-3/8" Circular Saw vs Milwaukee M18 FUEL 7-1/4 Circular Saw

The M18 FUEL 2834-20 is the better saw for most framing and carpentry work: its 7-1/4 in. blade cuts 2-5/8 in. deep at 90 degrees and 6,000 RPM keeps speed up under load, so it cuts 3x material in one pass. The M12 FUEL 2521-20 is a compact 12 V saw that tops out at 1.92 in. at 90 degrees, so it handles sheet goods, trim and overhead cuts where a full-size saw will not fit. Owners rate the M12 well (4.7 out of 5 from 60 ratings) for its size and light 4.5 lb build, but neither saw is a substitute for the other.

  • Choose the M12 FUEL 5-3/8 in. saw if you already run M12 batteries and need a light saw for trim, plywood, overhead and tight-space cuts.
  • Choose the M18 FUEL 7-1/4 in. saw if you cut framing lumber and sheet goods all day and need one-pass depth and blade speed that holds up under load.

Prices

  • Milwaukee M12 FUEL 5-3/8" Circular Saw: $110.00 at Amazon (last seen Nov 4)
  • Milwaukee M18 FUEL 7-1/4 Circular Saw: $279.00 at Tool Nut (last seen Nov 8)
  • Difference: the Milwaukee M12 FUEL 5-3/8" Circular Saw is $169.00 cheaper than the Milwaukee M18 FUEL 7-1/4 Circular Saw at the latest prices (Nov 4 and Nov 8)
Milwaukee
Milwaukee 2521-20 M12 FUEL 5-3/8” Circular Saw

Milwaukee M12 FUEL 5-3/8" Circular Saw

Milwaukee 2521-20 M12 FUEL 5-3/8” Circular Saw

4.7(60 ratings)
$110.00at AmazonChecked Nov 4
See all prices and details
Visit Amazon

Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

Pros
  • Small and light at 4.5 lb, easy to use overhead and in tight spaces
  • Runs on any M12 battery you already own
  • LED light and cut line blower keep the cut visible
  • Brushless motor with REDLINK PLUS overload protection
Cons
  • 1.92 in. depth at 90 degrees will not cut 2x framing in one pass
  • 3,850 RPM bogs down in thick hardwood and wet lumber
  • No electric brake
Milwaukee
Milwaukee M18 FUEL 7-1/4-in. Circular Saw, Tool Only (2834-20)

Milwaukee M18 FUEL 7-1/4 Circular Saw

Milwaukee M18 FUEL 7-1/4-in. Circular Saw, Tool Only (2834-20)

4.4(5 ratings)
$279.00at Tool NutChecked Nov 8
See all prices and details
Visit Tool Nut
Pros
  • 2-5/8 in. depth cuts 3x material in one pass
  • 6,000 RPM holds speed under load in framing and sheet goods
  • Magnesium shoe and guards add rigidity without excess weight
  • Electric brake, rafter hook and dust port
Cons
  • Heavy and bulky compared with the M12 saw
  • Needs M18 batteries and charger, sold separately as a bare tool
  • Overkill for trim and small overhead cuts

What separates them

Milwaukee M12 FUEL 5-3/8" Circular SawMilwaukee M18 FUEL 7-1/4 Circular Saw
Blade size5-3/8 in.7-1/4 in.
Max cut depth at 90 degrees1.92 in.2-5/8 in., enough for 3x material in one pass
Max cut depth at 45 degrees1.3 in.About 1-7/8 in.
No-load speed3,850 RPM6,000 RPM
Weight4.5 lb bare toolRoughly 10 lb bare tool
Battery platform12 V M12; up to 190 cuts in 2x4 with the XC5.0 HIGH OUTPUT pack18 V M18; more power, heavier packs
BuildGlass-filled nylon housing, 50-degree bevelMagnesium shoe and guards, electric brake, rafter hook
Dust and lightLED light, cut line blower, vacuum adapter includedLED light, vacuum adapter included, integrated dust port

Price history

  • Milwaukee M12 FUEL 5-3/8" Circular Saw: lowest $110.00 on Nov 4 at Amazon.

Prices at every store

Milwaukee M12 FUEL 5-3/8" Circular Saw

  • Way SourceNew

    In stockReturn policy

    $119.00Checked Nov 8
    Visit Way Source
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $110.00Checked Nov 4
    Visit Amazon
  • WalmartNew

    Availability unknown

    $149.00Checked Nov 4
    Visit Walmart
  • eBayNew

    Availability unknown

    $155.99Checked Nov 4
    Visit eBay

Also available at

  • Clark's Tool & EquipmentCheck price at Clark's Tool & Equipment
  • Tool NutCheck price at Tool Nut
  • Quality Industrial SafetyCheck price at Quality Industrial Safety

Store links may earn us a commission.

All 5 stores and price history →

Milwaukee M18 FUEL 7-1/4 Circular Saw

  • Tool NutNew

    In stockReturn policy

    $279.00Checked Nov 8
    Visit Tool Nut

Also available at

  • Edmondson SupplyCheck price at Edmondson Supply
  • Ace Tool GroupCheck price at Ace Tool Group
  • Griff Building SuppliesCheck price at Griff Building Supplies
Prices and history →

Specs compared

SpecMilwaukee M12 FUEL 5-3/8" Circular SawMilwaukee M18 FUEL 7-1/4 Circular Saw
Blade diameter5-3/8"—
Voltage12 V—
Battery typeLithium-Ion—
Max RPM no load3850—
Max cut depth at 90°1.92—
Max cut depth at 45°1.3—
Bevel capacity50—
Net tool weight4.50—
Length10.78—
Width6.00—
Height6.86—
Housing materialGlass Filled Nylon—
Show all 14 specsShow fewer specs
SpecMilwaukee M12 FUEL 5-3/8" Circular SawMilwaukee M18 FUEL 7-1/4 Circular Saw
colorred/black—
size5-3/8"—

What reviewers say

Milwaukee M12 FUEL 5-3/8" Circular Saw

  • 4.7 / 560 ratings

Rated 4.7 out of 5 from 60 ratings. Owners treat it as a compact problem-solver for tight cuts rather than a replacement for a full-size saw.

What people mention
  • Size and weightPraisedOwners like how small and light it is for cuts in tight spots and overhead.
  • Cut depthMixedIt handles 1x and sheet goods well, but 1.92" limits it on thicker 2x lumber.
  • Battery lifeMixedRun time is good with the HIGH OUTPUT XC5.0 pack and shorter with smaller M12 batteries.
  • Cut visibilityPraisedThe LED light and cut-line blower help keep the blade on the mark.

Milwaukee M18 FUEL 7-1/4 Circular Saw

Owners rate the 2834-20 highly for power and cut depth, calling it a strong framing saw that keeps up with corded models. Common complaints center on the left-side blade and the need to supply your own battery and charger.

What people mention
  • Cut depthPraisedOwners say the 2-5/8 in. capacity cuts 3x lumber in one pass.
  • PowerPraisedThe brushless motor keeps blade speed up in heavy cuts.
  • Blade sideMixedSome users find the left-side blade awkward at first.
  • BatteryCriticisedBuyers note it ships as a bare tool with no battery or charger.

Questions and answers

Which saw is better for framing?
The M18 2834-20. Its 2-5/8 in. depth cuts 3x material in one pass and its 6,000 RPM motor keeps blade speed up in thick lumber. The M12 saw cannot cut a 2x4 in one pass at 90 degrees.
Can the M12 saw cut a 2x4?
Not in one pass. Its 1.92 in. depth at 90 degrees is short of a 3-1/2 in. 2x4, so you cut from both sides or use it for thinner stock. It is built for plywood, trim and overhead work.
Which one is easier to use overhead?
The M12. At 4.5 lb bare tool it is far lighter than the M18 saw, and its compact body fits between joists. The trade-off is much less depth and power.
Do they share batteries?
No. The M12 saw runs on 12 V M12 packs and the M18 saw on 18 V M18 packs. If you already own one platform, staying on it saves buying batteries and a charger.
Is the M18 worth stepping up to?
Yes if you cut framing lumber and sheet goods regularly. The extra depth, speed and magnesium build pay off on site. If your work is trim, cabinets and small cuts, the M12 covers it in a lighter package.
Which lasts longer?
Both use brushless POWERSTATE motors and are built for professional use. The M18's magnesium shoe and guards resist jobsite abuse better, while the M12's plastic housing shows wear sooner under heavy use.

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