Woodworker's Journal 1994-18-3, страница 24

Sears offers infinitely variable speeds (300 to 3.000 rpm) by controlling motor speed with a single push-pull, rotary-OS/OFF switch. Post to right of s n itch can be fitted with padlock to keep unau-

Motor amperage is a beuer indication of power. Most of the saws draw between 2.3 and 2.5 amps. Fn my tests, 1 noticed that they bogged down when cutting oak boards over about 1¹ /2 in. thick, unless 1 took the cut slow and easy without too many sharp turns. The Dremel and Skil were exceptions. With their powerful 6-amp. '/2 hp motors, they easily sliced through hardwoods up to 3 in. thick. But these saws arc also the largest and heaviest of the benchtop ma chines, rivaling the size of many smaller stationary units. In fact, if you buy the optional legs sets for them, that's just what they would be. They're a bit too heavy and bulky to easily lift on and off the bench, and they take up considerably more bench space than the rest. As an aside, you may have noted in the photos that the Skil and Dremel look nearly identical. In fact, they are except that the Dremel is a two-speed saw, the Skil a one-speed saw (see Blade Speed on page 25). Both companies are subsidiaries of S&B Power Tools.

None of the benchtop saws, including these two, did a good job resawing softwood or hardwood boards over about 3

Flip lever tensioning device on Delta 28-180 provides correct tension for different blade widths. See text.

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saws, which is the theoretical maximum motor output. However, a motor can't run continuously at it's maximum hp without burning up. A continuous hp rating is more accurate because it indicates the maximum power developed under normal operating conditions. The chart on page 25 show s continuous hp ratings for the saws. With the exception of the Dremel, Ryobi and Skil. all of the units tested have '/5 hp motors (continuous duty).

Speed changes on two-speed Dremel are made by releasing belt tension via a lever, rather than manually moving belt on stepped pulley.

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You need an alien wrench to adjust the wheel tilt on the Ryobi (shown) and Sears saws. The rest have external knobs. Tensioning knob on Ryobi (top) can be depressed to quickly release tension for easy blade changes.

23 The Woodw orker's Journal

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Lightweight ABS plastic wheels do not provide the momentum of heavier cast-aluminurn ones. They're also more likely to distort or even break under tension. On the plus side, they add less weight to the saw, making it easier to lift on and off the bench.