Woodworker's Journal 2002-26-3, страница 50
"What started with cordless drills has It takes a hefty 24-volt battery pack to drive the Bosch 3924 cordless compound miter saw's big 10" ultra-thin-kerf blade through full-size cuts in hardwoods and construction lumber. Woodworker's Journal June 2002 50 charger Qook for at least 3 or 4 electrical contacts on the battery). You'll get better performance and longer battery life in the long run. Are Ni-MH or special "extended power" batteries worth their greater cost? My experience suggests that they're best suited to pros and "power users" who really push their tools hard. Speaking of batteries, make sure to check the price of a replacement battery before you buy a tool. All batteries wear out eventually, and you might get a quite a shock (emotional, not electrical) when you find out that a replacement can cost more than one third the price of the original tool! For packs more reasonably priced than factory replacements, check out these web sites: www.ecordlesstool.com and www.batterybarn.com. The latter site offers economical replacements — including Ni-MH — for most brands, models and voltages. Sandor Nagyszalanczy is a professional writer, photographer and author of seven books, including "Power Tools: An Electrifying Celebration and Grounded Guide" available from The Taunton Press. Recommendations If you're thinking of replacing or upgrading your cordless tool arsenal, you'll be impressed with the performance of the latest tools — almost regardless of voltage — compared to those manufactured five or 10 years ago. But before you plunk down hard-earned cash to buy a top-flight cordless drill or circular saw, consider first that a corded tool can provide more power and less hassle. Cordless tools are more expensive to buy and maintain (batteries wear out and need replacement), are less powerful (save for the 18 to 24volt models) and are heavier than their corded cousins. If you've decided to go cordless, the biggest issue facing you is what voltage tool to buy? If you're leaning toward an 18-, 19.2- or 24-volt model, ask yourself if you really need all the power such a tool delivers. Unless you're a pro who demands stellar cordless performance, it's likely a lighter Porter-Cable's new 9290 is the world's first cordless router. The 1/4" collet router comes with a fixed base standard, but easily plugs into other Porter-Cable model 690 bases, including the plunge base shown here. now blossomed into nearly an entire workshop's worth of battery powered tools." 12-, 14.4- or 15.6 volt tool will do the trick. Drill/drivers in this voltage range easily handle screw driving chores and can bore up to 3/4" holes in wood and 3/8" holes in steel. If you're leaning toward a high-voltage model, remember that power has its price: The higher the voltage and/or size of the battery, the more weight you have to hold and carry, and the more torque you must resist when using the tool (Porter-Cable developed 19.2-volt tools because they viewed them as having a better weight, power and cost balance than 24-volt tools). Top-power tools also put a strain on your wallet: These big tools, special chargers and hi-octane batteries cost big bucks! It's usually most economical to buy a new cordless tool in a kit with two batteries and a charger {check Chris Marshall's article on combo kits starting on page 62). Heavy-duty users should buy three batteries: One to use, one to let cool after use, and one to charge. Given the choice between two models with similar features, definitely choose the tool that comes with the more advanced |
