For many crafters and tool users replacing worn or damaged power tool parts has become as familiar as driving a screw. For many of those same crafters, though, the thought of replacing the armature in a power drill is daunting if not altogether discouraging. Fortunately though, replacing the armature in a cordless Makita drill, one of the most popular drill types on the market today, is a far simpler process than you might have thought. In fact, with just a dash of courage and a handful of generally simple steps, you can remove and replace the armature in your Makita cordless drill like a true cordless-drill-armature-replacing fool.
Cordless Driver Drill
First, as with any other cordless tool repair procedure, you must turn-off the drill and remove its battery. Next, you simply need to crack into the tool.
Cordless Driver Drill
Lay the tool down on a sturdy flat surface and remove the drill's end-cap and the top half of its clamshell or housing. The end-cap is the dome-shaped section of the housing directly opposite the chuck. top half of the clamshell or housing. Both the housing and end-cap will be held together with star-head screws, accordingly, you will require a star-head screw driver or drill bit to properly open the housing. Set the screws and the top half of the housing safely aside as you continue.
Now that all your power tool's guts and glory are exposed, you will need to remove a few pieces before gaining full access to the armature. First, release the heat sink. This is an L-shaped piece of metal attached to the switch by a series of wires that latches-down over the armature and yoke. Simply pull and place it out of the way. Next, carefully remove the tool's gear-box and brush-holder.
Take note of how these pieces are placed and positioned so that when reinstalling them, every component comes back together properly.
At this point, and because you've already got the tool cracked open, it is also a good idea to check the integrity of your brushes. These little suckers are certainly no strangers to wear and tear and it is never a bad idea to replace them where there are indications of damage. So, if your brushes look worn or crumbly, replace them before completing your repair.
Now that you have gained access to the armature, simply remove the armature and yoke, which at this point, will be connected and removed as one piece. The yoke is an open ended casing which fits over the fattest part of the armature's body. Simply pull the two apart and insert the new armature into the yoke in the same fashion the damaged armature was removed.
Next, you will simply need to move backwards through procedure. This time, however, you get to combine a few steps. In fact, you will essentially insert all components thus far removed as one singular piece. In other words, insert the yoke and armature, the gear-box, and brush-holder simultaneously.
To do this, use the armature to push the brushes into the brush-holder. Ensuring the brushes can make complete contact with the armature, simply squeeze the two together and, holding that position, square the gear-box to the armature's other side. Slide the components into the housing together ensuring they are positioned identically to their pre-removal stations. While inserting, you must also match the notch in the yoke to the plastic notch-catch that is molded into the drill housing. Matching and securing these points will ensure the armature (and surrounding components) remains in the right place inside your drill. NOTE: to match these points, the notch in the yoke will face directly away from you, or, what is now the very bottom of the drill.
Now that the armature and yoke, the gear-box and brush-holder are secured properly in place, replace the heat-sink. Next, replace the top-half of the drill housing and the end-cap. Here, be especially careful not to damage the threads of your star-head screws. This ensures that no matter how many times you need to break into your drill, those screws remain tight.
Lastly, to ensure everything has come back together properly, you simply need to test the drill. Attach the battery, engage the tool, and drill a few screws. If everything runs smoothly, then, congratulations, you have successfully replaced the armature in your Makita cordless drill. If everything doesn't run smoothly, remove the housing once more and retrace your steps ensuring each component is properly communicating with its fellows. If you can find an error, for instance, if your brushes are not making complete contact, fix it. If you can not find an error or cannot otherwise convince the tool to perform properly, take the drill to an authorized Makita service center for professional inspection.
Makita Cordless Drill Repair: How to Replace Your Armature
Cordless Driver Drill
Oct 22, 2011 02:06:46
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>> Click here to update Cheapest prices for Bare-Tool Makita BHP452Z 18-Volt LXT Lithium-Ion Cordless 1/2-Inch Hammer Driver-Drill (Tool Only, No Battery) <<
Bare-Tool Makita BHP452Z 18-Volt LXT Lithium-Ion Cordless 1/2-Inch Hammer Driver-Drill (Tool Only, No Battery) Feature
- Makita-built 4-pole motor delivers 450 in.lbs. of Max Torque, with a variable 2-speed all metal transmission (0-400 / 0-1,500 RPM) for a wide range of applications
- Compact, ergonomic design at only 8-3/4-Inch long; weighs just 4.2-Pound.
- Features such as a built-in L.E.D. light to illuminate the work area and a rugged tool belt clip
- Makita LXT lithium-ion battery and energy star rated 30-Minute rapid optimum charger produces 430-Percent total lifetime work with 2.5X more cycles
- 3-Year warranty on tool
Bare-Tool Makita BHP452Z 18-Volt LXT Lithium-Ion Cordless 1/2-Inch Hammer Driver-Drill (Tool Only, No Battery) Overview
Lightweight and compact with ergonomic soft grip design for superior screwdriving control; 4-pole motors provide high impact power. Build in job light maintains illumination 12-13 secs after trigger release. STANDARD EQUIPMENT: Bare Tool (Tool Only - No Batteries No Charger), 13mm Keyless Chuck. SPECFICATIONS: 16+1 Torque Settings; 2 Speed; Capacities: Masonry 13mm, Steel 13mm, Wood 38mm; No Load Speed:-Hi 0-400rpm;- Lo 0 -1,500rpm; Max. Fastening Torque: 50Nm; Net Weight: 1.8kg.
Bare-Tool Makita BHP452Z 18-Volt LXT Lithium-Ion Cordless 1/2-Inch Hammer Driver-Drill (Tool Only, No Battery) Specifications
The Makita 18V LXT Lithium-Ion Cordless 1/2-Inch Hammer Driver-Drill delivers versatility and longer run time to the jobsite. The BHP452Z can be run as a driver-drill or a hammer driver-drill, allowing the user to carry just one tool on the job instead of two, replacing the standard driver-drill.
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| BHP452Z Features | | POWER - Makita-built 4-pole motor delivers 450 in.lbs. of Max Torque, and handles concrete, wood and metal | | CONTROL - 2-speed all-metal transmission, easy-mode shift and built-in L.E.D. light | | COMFORT - Only 4.2 lbs. with ergonomic grip | | PERFORMANCE - LXT Li-Ion batteries charge in 30 minutes, run longer and deliver 2.5X more cycles | | Battery and charger not included |
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| Tool Specifications |  | | Capacities | Steel (1/2"), Wood (1-1/2"), Masonry (1/2") | | No load speed | 0-400, 0-1,500 RPM | | Blows per minute | 0-6,000, 0-22,500 BPM | | Maximum torque | 450 in.lbs. | | Battery | 18V LXT Lithium-Ion | | Overall length | 8-3/4" | | Net weight | 4.2 lbs. (w/battery) |
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Makita-Built Motor Engineered for Versatile PowerThe BHP452Z features a Makita-built four-pole motor that delivers 450 in.lbs. of Max Torque in a compact size. The BHP452Z has a Shift-Lock drive system sleeve that quickly shifts from "hammer drill" to "driver" mode. The two-speed all-metal transmission delivers 0-400 RPM in low speed and 0-1,500 RPM in high, covering a wide range of drilling and driving applications.
Ergonomic Design in a Compact Size
The BHP452Z weighs just 4.2 pounds (with battery, sold separately) with a more compact design at only 8-3/4 inches long and an ergonomic shape that fits like a glove for reduced operator fatigue. The BHP452Z is also equipped with a built in L.E.D. light that illuminates the work area for more efficient work.
Versatile Design for a Range of Applications
The BHP452Z's percussive hammer and driver-drill capabilities are a perfect fit for the pro that wants more features. This tool is perfect for a range of applications requiring percussive hammer-drilling, include fastening medium sized anchors, drilling into masonry, and even setting small sized anchors into concrete. The BHP452Z will handle a full range of drilling and driving tasks into wood and other materials, and can be utilized in many different areas such as HVAC, woodworking, plumbing, electrical, and more. It's ideal for any pro contractor who requires a best-in-class engineered cordless hammer driver-drill. The BHP452Z is just another example of Makita's commitment to innovative technology and best in class engineering.
About Makita's 18V LXT Lithium-Ion Cordless Tool Series
As one of the pioneers driving the cordless tool revolution, Makita changed the game with its breakthrough 18V LXT Lithium-Ion Cordless Series. Three years after its debut, Makita's LXT Series has grown from seven to over 35 tools, providing a wide range of cordless solutions for professional tradesmen. Makita also added 18V Compact Lithium-Ion for cordless power in a more compact size. Makita's 18V Lithium-Ion batteries and ENERGY STAR rated Optimum Charging System provide several benefits over old battery technology. When compared to traditional 18V Ni-Cd batteries, Makita's 18V 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.
Makita's 18V Lithium-Ion battery delivers 2,000 cycles--2.5X more than Ni-Cd. In addition, built-in shock absorbing features help protect the battery, and sixteen firm-holding contact terminals deliver constant high power. During the charging process, a built-in memory chip in the battery communicates with the Optimum Charger for a more efficient charge, extending the battery life. Makita's Optimum Charger is also faster: it will charge an 18V LXT Lithium-Ion battery in just 30 minutes, and an 18V Compact Lithium-Ion battery in only 15 minutes. Makita also offers a Rapid Automotive Charger for 18V LXT and 18V Compact Lithium-Ion batteries that plugs into 12V DC sockets equipped in most automobiles and trucks for added mobility. Makita's growing line of LXT cordless tool solutions features a wide range of industrial-quality power tools, including driver-drills, impact drivers, impact wrenches, saws, grinders, screwguns, rotary hammers, and more. The LXT Series also offers a jobsite radio, rechargeable flashlights, and several different combo kits.
About Makita
Makita is a worldwide manufacturer of industrial quality power tools and offers a wide range of industrial accessories. Makita applies leading-edge innovation to engineer power tools that are more compact and energy efficient, yet deliver industrial strength power and results. Makita U.S.A., Inc. is located in La Mirada, California, and operates an extensive distribution network located throughout the U.S. For more information, please call 800/4-MAKITA (800/462-5482) or visit makitatools.com. Makita is Best in Class Engineering.
Warranty
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. Please see makitatools.com for complete details.
What's in the Box
Makita BHP452Z 18V LXT Lithium-Ion Cordless 1/2-Inch Hammer Driver-Drill (tool only).
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| Driver-Drills | Impact Drivers | Impact Wrenches | | BHP454 | BDF451 | BDF452 | BDA350 | BTD144 | BTW450 | BTW251 | BTL063 |  |  |  |  |  |  |  |  |
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| Concrete | Metalworking | Combo Kits | | BHR240 | BCS550 | BPB180 | LXT1500 15-Tool Kit | LXT1200 12-Tool Kit | LXT902 9-Tool Kit |  |  |  |  |  |  |
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