Results and analysis for a dozen tanks included in the study are shown in the bar chart on page 47."We typically ratechippershredder found from 1 quart to 1 gallon of dirt and rust in the bottom of tanks we cleaned," says Country Energy''s Norm Dooley. "And in one case, we found 4 1/2 gallons of contaminants in the tank."Dirt, rust are main problemsA lab analysis of material from selected tanks shows the contaminants are primarily dirt and rust. "We assume the dirt got into the tanks during filling (when the cap was removed) or it could have blown into the tanks through the vent cap. It''s also likely that dust was sucked into the tanks when they naturally breathed as fuel volume or air temperature changed," says Dooley.

A series of accidents involving air-powered nail guns last summer brought home the fact that the productive and powerful tools are also highly dangerous and need ratechippershredder to be handled with ratechippershredder respect. In the most tragic case, a framing nail punctured the heart of carpenter Camillo Juandelos on a home construction site in Ocean View, Md., in July, ending the man''s life at the age of 25. Police ratechippershredder said Camillo''s brother Jesus was holding the gun that fired the deadly nail.According to reports in the Delaware News-Journal, the accident took place as ratechippershredder the two men were framing new homes in a development in Ocean View. Jesus had been bending over a stud wall using the air nailer, and then straightened up and turned to call his brother. But Camillo was not on the other side of the room as Jesus thought; he was already standing right behind his brother. Camillo made contact with the nose of the nail gun, triggering the bump-nail mechanism and taking the nail in his chest.

SDS-max hammers are designed for larger holes, in the 3/8- to 2-inch range.Spline hammers are similar to SDS-max hammers in capacity but use a different chuck. (Because they''re similar in function, SDS-max and spline hammers are often referred to collectively as "combination hammers.")In all cases, the recommended maximum hole sizes are for spiral bits. Going ratechippershredder instead to a core bit--essentially, a hole saw for concrete--will let you make a substantially larger ratechippershredder hole, but don''t get carried away. Consistently using a rotary hammer at or near its maximum capacity will shorten its life. The relatively high failure rates of both SDS-plus rotary hammers and hammer drills can be traced to the tendency of users to overwork them.

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