Because our power tools have such an intricate internal structure, it can be very difficult to know just where exactly your problem is if the tool won't start. It's true that wear and tear can occur anywhere in or on our power tools and that all of this wear and tear will effect them; it's also true however, that there are just a few generally simple steps to take towards finding the glitch that keeps your tool from ticking.
Power Tool Combo
Firstly, because brushes are fairly simple to check, and are a common spoil of power tool wear and tear, check-out the tool's carbon brushes first. Brush damage can look like a few different things: heavy wear, chips, heat-damage, or burrs (build-up around the brush that keeps it from making contact with the armature). Heavy-wear, chips, and heat damage are clearly visible, prevent electrical current from flowing, and require replacement; burrs, on the other hand, can usually be scraped away but may require replacement anyway. Because the tool will not engage if brushes don't make complete contact with the armature, before moving one you need to be certain that the brush is capable of maintaining contact. If it can't, it needs to be replaced, simple as that.
Power Tool Combo
Hint: If the brushes are significantly damaged, it's a good idea to move directly to checking the armature. Sometimes armature damage can prematurely wear or severely chip the brush's carbon block, hence, intense brush damage can be an indicator of a damaged armature.
Second, because a switch is quite a bit more delicate than an armature, you'll want to take a look at your switch assembly next. Here, wear and tear usually comes in the form of heat damage which can look like burning or charring, or like colorful discoloration. The plastic or wires of the switch may even be melted; any of these would certainly be cause to keep your tool from firing up. A switch can also be damaged by water or moisture, which although more difficult to detect, is equally damaging to the performance of the part and the tool as well. If the switch appears burned or discolored, or if you know it has suffered water damage, the assembly must be replaced. If switch damage is the only weak-link in your power tool, simply replacing it should get your tool feeling much better.
Hint: Although brushes are generally easier to check, switches are more commonly the culprit in a tool that will not engage. Additionally, and just like your brushes, sometimes your switch will simply wear-out and require replacement with or without visible signs of damage.
Well, now it's now time to revisit that armature. First, take a look at the commutator bars, or the things your brushes connect with along the electrical path. The bars should form a perfect circle; if any bars are raised or missing this can cause brush damage and non-contact with the brushes. The commutators, as well as the rest of the assembly, may have also suffered some heat-damage; this will, again, look like burning, charring, melting, or colorful discoloration of the metal. If you have heat damage on your armature, chances are your other components will be in the red-zone as well. A damaged armature must be replaced with rapidity.
Hint: In addition to causing brush damage, damaged commutators can also cause arcing within the tool which will manifest to the user as a loss of power and performance. Remember also that when you experience a lack of power or performance, all the tool's components are overworking and likely overheating as well which leads, of course, to heat-damage. If you're not careful you'll be dumb-struck by a tool with a bunch a fried-up components. Next on the checklist is your field; if your field is damaged you will again see burning, melting, or discoloration of the body, wire, or insulation. Additionally, before it goes kaput, the tool will feel sluggish or unambitious with a general lack of power and performance. Field damage most commonly occurs as a result of overlaoding or overheating within the tool (which is a result over misusing or abusing the tool). If the field is damaged, it, like the armature, should be replaced quickly.
Hint: Damaged parts always need to be replaced to prevent spreading damage to the tool's other components. A damaged field or armature will usually reflect damage in the rest of the tool's parts. Additionally, if the tools other components are severely damaged, it is a good indicator of deeper damage to the armature and field, so, if your switch or brushes are significantly damaged, you must check the other components as well. Double additionally, just like you might need to change your car's oil and air filters the same time, brush, switch, armature, or field damage occur in any order, in any combination, or all together. Accordingly, it's important that you give your power tool a complete check-up at the earliest signs of wear.
And there you have it, just a few simple steps to revive that suffering power tool and you're good to go. If, however, you can't find problems with any of the above listed components, you should take your power tool to an authorized service center for professional inspection.
What Should I Do If My Power Tool Won't Start?
Power Tool Combo
Dec 02, 2011 20:12:31
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>> Click here to update Cyber Monday prices for DEWALT DCK590L2 20-Volt MAX Li-Ion 3.0 Ah 5-Tool Combo Kit <<
Cyber Monday DEWALT DCK590L2 20-Volt MAX Li-Ion 3.0 Ah 5-Tool Combo Kit Feature
- 20V MAX hammer drill with patented 3-speed all-metal transmission and 1/2-inch self-tightening chuck
- 20V MAX reciprocating saw with key-less blade clamp allows for quick blade change
- 20V MAX 1/4-inch impact driver features 3 LED lights with 20 second delay to provide visibility
- 20V MAX LED work light delivers 110 lumens of light output
- 20V MAX circular saw with 6-1/2-inch carbide blade can cut 2-by-4's at a 45-degrees angle
Cyber Monday DEWALT DCK590L2 20-Volt MAX Li-Ion 3.0 Ah 5-Tool Combo Kit Overview
This kit includes a 20V MAX 3.0 Ah Li-Ion premium 3-speed hammer drill, a 20V MAX 3.0 Ah Li-Ion reciprocating saw, a 20V MAX 3.0 Ah Li-Ion 1/4-inch impact driver, a 20V MAX circular saw, a 20V MAX Li-Ion LED work light, two 20V MAX 3.0 Ah Li-Ion battery packs, a carbide tipped blade, a charger, belt hook, and a contractor bag.
Cyber Monday DEWALT DCK590L2 20-Volt MAX Li-Ion 3.0 Ah 5-Tool Combo Kit Specifications
DEWALT’s DCK590L2 20-volt max lithium-ion 3.0 Ah five-tool combo kit includes a premium hammer drill, a 1/4-inch impact driver, a circular saw, a reciprocating saw, and a work light—a well-rounded arsenal of high-performance power tools that help everyone from carpenters and remodelers to electricians and contractors work their way through a variety of applications.
 | DCK590L2 20-Volt Max
Five-Tool Combo Kit
At a Glance:- Compact and ergonomic designs that don’t compromise on power
- Five tools included: premium hammer drill, 1/4-inch impact driver, circular saw, reciprocating saw, and LED work light
- Tools come with 3-year limited warranty, 1-year free service contract, and 90-day money-back guarantee
- Lithium-ion batteries come with 3-year free service contract
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The DCK590L2 kit includes the DCL040 LED work light. View larger |
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Hammer DrillThe 1/2-inch hammer drill’s high-power, high-efficiency motor delivers 535 unit watts out for superior performance in light and medium drilling applications. A 1/2-inch ratcheting chuck with carbide inserts provides superior bit-gripping strength—reducing slippage during high-torque applications—thus providing longer tool life. The hammer drill’s patented three-speed (0-600 RPM; 0-1,250 RPM; and 0-2,000 RPM), all-metal transmission allows users to select the appropriate speed for the job at hand and is up to 30 percent faster than current hammer drills on the market.
Impact Driver
Meanwhile, the impact driver’s robust motor delivers 2,800 RPM—up to 43 percent faster than current impact drivers on the market. Its one-handed loading 1/4-inch hex chuck accepts and holds 1-inch bit tips for convenient fastening in tight spaces. Research shows that impact drivers are growing in popularity largely because of their smaller size and lack of kickback (or reactionary torque) thanks to the impact mechanism within the tool. Combined with its 5.55-inch length and 3.4-pound weight, the premium impact driver packs a serious punch in a small package.
Circular Saw
The circular saw’s powerful motor (offering 460 max watts out) and ergonomic profile (with lightweight magnesium shoe and optimized handle design) are ideal for professionals tasked with framing, cross cutting, ripping, bevel cutting and plunge cutting. Delivering 3,700 RPM, this saw is 10 percent more powerful than previous DEWALT 6.5-inch cordless circular saws—and combined with its accompanying 3.0 Ah lithium-ion battery, it provides up to 57 percent more runtime compared with other leading 18-volt lithium-ion tools. Its bevel capacity of 0-50 degrees lends itself well to a variety of applications, and a 6.5-inch thin kerf carbide tooth blade provides users with the ability to cut completely through two-by framing lumber at a 45-degree bevel angle.
Reciprocating Saw
The reciprocating saw is compact and lightweight for access to tight areas (and it helps to reduce user fatigue). The keyless lever-action blade clamp makes for quick and easy blade changes, and the blade reverses for upside-down and flush cutting. Its 1-inch stroke length delivers 0-3,000 SPM for fast cutting. A variable-speed trigger with lock provides increased control, and an electric brake prevents blades from breaking with exiting plunge cuts.
LED Work Light
The work light comes equipped with additional lumens (110 total) for brighter visibility, delivering bright white LED light that reduces shadows and helps differentiate between colors. (An added bonus: The LED bulb creates less heat than conventional Xenon bulbs.) Its pivoting head rotates 120 degrees with 11 detent positions for a wide range of visibility, and the integrated hanging hook allows for hands-free capability. Users can expect up to 11 hours of light output when paired with the 3.0 Ah 20-volt max lithium-ion battery.
Endurance and Ease of Use
DEWALT-designed electronics have been built into all of these tools’ switches to provide maximum life by helping to protect them from overheating, overloading, and deep discharge during use. The max 20-volt’s lithium-ion batteries provide up to 35 percent more runtime than existing 18-volt max lithium-ion battery technology, and the included Energy Star-qualified charger has dual voltage capabilities and it is compatible with both 12-volt max and 20-volt max DEWALT lithium-ion batteries. The tools’ slim handles fit easily into users’ hands, increasing the level of comfort during the course of long jobs, and the bright built-in LED work lights above the triggers have a 20-second delay that improves visibility in dimly lit spaces.
About DEWALT's 20-Volt Max Lithium-Ion Tools
DEWALT’s line of 20-volt max lithium-ion tools features improvements in engineering and design to provide the performance, the ergonomics, and the innovation that contractors require. The new line consists of 11 tools, two lithium ion batteries, and two battery chargers, as well as a number of combo kits.
What's in the Box
One DEWALT DCK590L2 20-volt max lithium-ion 3.0 Ah five-tool combo kit, including one DCD985 premium hammer drill, one DCF885 1/4-inch impact driver, one DCS393 circular saw, one DCS381 reciprocating saw, one DCL040 LED work light, two 20-volt max 3.0 Ah lithium-ion batteries, one 12-volt max/20-volt max lithium-ion battery charger, one belt hook, one 360-degree side handle, and one contractor bag.
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| DEWALT's 20-volt max DCK590L2 kit also includes the line's impact driver, reciprocating saw, circular saw, and hammer drill. (Click each to enlarge) |
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In addition to their breakthrough 18-volt LXT series, Makita has added 18-volt compact lithium-ion tools for cordless power in a more compact size. Makita's 18-volt lithium-ion batteries and ENERGY STAR rated Optimum Charging System provide several benefits over old battery technology. When compared to traditional 18-volt NiCd batteries, Makita's 18-volt lithium-ion batteries have 40% less weight, longer run time, and five times lower self-discharge to keep cells active and ready to use at any time.
About Makita
Every Makita lithium-ion tool is backed by Makita's 3-year warranty that covers repair due to defects in materials or workmanship up to three years from the date of original purchase. Makita lithium-ion batteries and chargers have a limited 1-year warranty.