Milwaukee 6538 21 15.0 Amp Super Sawzall Reciprocating Saw Review

milwaukee 6538 21

Milwaukee 6538 21 Super Sawzall Reciprocating Saw

Milwaukee 6538 21 is a great product of Milwaukee. Milwaukee invented the first reciprocating saw (dubbed the Sawzall). Since then many other manufacturers have come up and tried to replicate Milwaukee’s success to no avail. Milwaukee is still the leader in the production of best reciprocating saw and Milwaukee 6538 21 Super Sawzall Reciprocating Saw is a proof of that.

Milwaukee 6538 21 saw is a 15 AMP super Sawzall Reciprocating Saw that is protected by the best overload protection of any tool on the market.

With this saw, you can work at speeds of up to 2800 SPM without worrying about the motor burning out. If you are considering buying a high quality reciprocating saw, this may be the best option for you.

Whom Is This Product Designed for?

  • General plumbing contractors
  • Road construction contractor
  • General builders
  • Do-it-yourselfers who loves using power tool for repair or remodeling projects
  • Artisans who do remodeling work
  • Carpenters



Product Depth (in.)  19.5 in Product Width (in.)  3.75 in
Product Height (in.)  5.8 in


Amperage (amps)  15  Cordless/Corded  Corded 
Color Family  Red Product Weight (lb.)  9.8 lb 
Cord Length (ft.)  8 ft Variable Speed  Yes
Voltage 120 volts Returnable  90-Day 
Shipping Weight  14 pounds Strokes per minute  2800 
Keyless/keyed blade change  Keyless  Tools Product Type  Power Tool 
Length Of Stroke  1.25 in  Date First Available September 14, 2004
Power Tool Features  Case Included, No Tool Blade Change, Adjustable shoe Manufacturer Warranty 5 years

Here are the features that come with this high-end reciprocating saw-

Important Features of Milwaukee 6538 21

Smooth controlled cutting speeds

milwaukee 6538-21 15.0 amp-13Milwaukee 6538 21 reciprocating saw model comes with the best controls available today. Its 15.0 Amp motor offers the highest overload protection in the industry.

The motor will protect the motor from burning up or other mechanical failures, allowing you to work with the tool for longer without worrying about the tool overheating.

This tool also comes with a variable speed trigger that allows you to control the speed of the saw’s stroke using a speed control. This feature is very useful to help you in cutting different materials at a different speed for you to get the smoothest cut.

For instance, you can increase the speed of the saw to its maximum capacity while cutting large and dense materials. It is possible to also vary the speed to a lower speed to cut soft materials.

Superior quality designed for heavy cutting

milwaukee 6538-21 15.0 amp-14This Milwaukee 6538 21 saw is designed for anyone who needs a quality saw for heavy cutting needs. You can use this saw for heavy demolition works, metal cutting, drywall, concrete cutting, or any other type of cutting. You can also use this tool when cutting timber or even pruning your trees.

This is an amazing tool that will help you with any cutting job that you have in your mind.

Patented counter-balanced mechanism

milwaukee 6538-21 15.0 amp-15Milwaukee 6538 21 reciprocating saw comes with a patented counterbalance mechanism. This enhances smooth running and causes low vibrations when using the tool. This mechanism will help you to balance the tool well when performing your cutting materials.

You can agree with us that when using a tool that has no counter balance mechanism you get tired very quickly while trying to balance the tool.

With this tool, you will cut comfortably without the need of straining to balance the tool. Less vibration means more balance and a straighter cut.

Patented gear-protecting clutch

milwaukee 6538-21 15.0 amp-16This feature helps in protecting your gears and increases the life of the motor. It absorbs the high impact forces that are caused by sudden blade lock-ups.

This will help you to perform your work faster without having to change the blades when they break due to lock up.

The mechanism will make sure that your tool remains in the best working condition and will save you a lot of money that you could have used in buying other blades or replacing the expensive motor.

Constant power technology

Milwaukee 6538-21 is the first reciprocating saw manufactured by Milwaukee that features this relatively new technology.

This technology ensures that the tool has a constant power supply and maintain a constant load for unmatched cutting performance. This will enable you to cut through different kinds of materials at the same speed reducing the chances of the blade lock up or even breaking.

It is an important feature that ensures that your saw remains in it’s best condition as well as ensuring that it deliver top-notch service.

Warranty and weight

milwaukee 6538-21 15.0 amp-17Milwaukee 6538 21 15.0 Amp Super Sawzall Reciprocating saw weighs about 14 pounds. This is less weight when you compare with other full-length saws available on the market. Its lightweight design would ensure that you use the tool for a longer period without getting tired.

It is also smaller in length when you compare to other models. This size made suitable in working with where space is limited. The saw also comes with a warranty of five years.

In case, your saw malfunction within the first five years because of manufacturer fault you can return to any Milwaukee factory or appointed a distributor for repair or replacement.

With this warranty, you can have peace of mind when using the tool to complete your everyday work.

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[su_box title=”Pros” box_color=”#10a704″]
  • Able to get through 10-inch tree branches easily
  • Easy to hold and easy to line up for all cuts
  • Holds up well under constant, consistent use
  • Well made and strong
  • Comes with a durable case that does a good job of keeping the saw safe
  • Perfect balance when held in your hands
  • Can cut back and forth and even make circular cuts
[/su_box] [su_box title=”Cons” box_color=”#de0516″]
  • Requires a heavy duty extension cord –this is an additional cost consideration
  • The Pin can drop out easily

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Special note

This Milwaukee reciprocating saw is well thought out, ruggedly build saw that gives good service life. However, just as many high-end products, this high-level performance comes at a price but it worth it.

It is also important to make sure that you use only high quality blade for the best work output.

Frequently Asked Questions

Question: Why is the 15 amp better than the 11 amp or 12 amp? What more can it do?

Answer: They make a 12 amp model, not an 11 Amp. The 15 AMP has more brute power when cutting and further has the ability to maintain its momentum under greater stress. It will not slow down or bog down.

The unit has a clutch which will disengage the unit and a dial control which allows you to reset the max speed of the blade.

Additionally, it has an orbital feature which adjusts the stroke of the blade from straight up and down to a circular motion (orbital). This allows for faster tearing and cutting.

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Final Verdict

As you can see from the features that we have listed, Milwaukee is a great tool to add to your toolbox. Ensure that you have it, especially if you need a strong saw that will help you in all your cutting work.

You do not need to go and purchase a weak saw that probably won’t last for a say without having trouble. This model ensures that you have exactly what you are looking for.

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