Electrical Contracting News (ECN) August 2016 - Page 32

TOOLS desks and flooring – however, cutting it can produce really unpleasant fumes. The density of the fibreboard can cause the hole saw to heat up, potentially melting the glue adhesive in the composite itself. To overcome this problem and speed up the cut, some contractors will drill numerous pilot holes around the circumference of the hole to be cut and then use a hole saw to finish the job. However, this method is time consuming and doesn’t result in a perfect, clean cut. When drilling MDF, engineered and composite woods that contain adhesives, as well as plastics and plasterboard, consider using a tungsten carbide tipped multi-purpose hole saw. This will deliver cutting speeds that are up to five times faster than a typical bi-metal hole saw and the rapid cut will build up less residual heat, giving less time for the adhesive to reach a melting temperature. 5. Dust and debris Cutting composite and engineered wood can produce really unpleasant fumes. When a job requires cutting holes to fit a tile around cables and pipes, or fittings need to be attached to a tiled surface, always use a hole saw with a diamond-grit coated tip. The diamond coating will easily cut through porcelain, glass, ceramics, brick and stone without chipping or breaking. When accompanied with proper water cooling, you will be left with a clean cut and smooth surface finish. 2. Hole enlargement Turning up to a job fitting downlights and realising that the 75mm super low voltage spotlights that the customer has specified need to fit into the 50mm holes left by the previous lights can put you in a bit of a pickle. Where it would normally be suitable “ THERE IS NO REASON FOR ADVANCES IN MATERIALS AND DESIGN TECHNOLOGY TO GET IN THE WAY OF TRADESPEOPLE ACHIEVING PERFECTION. to simply drill a 75mm hole to fit the light, here there is no obvious way to pilot the 75mm hole saw. In this case, consider replacing the pilot drill with a hole enlargement arbor. The arbor can be fitted with a hole saw that has the same diameter as the existing hole – this acts as the pilot – as well as a larger diameter hole saw, allowing the larger diameter to be cut in one single motion. 3. Cutting thick steel There’s nothing more frustrating when a tool breaks unexpectedly. However, for most tools, this is rarely something that happens out of the blue, but is rather caused by long term wear on a tool that can lead to a sudden break. Cutting steel is a perfect example of something that can cause this. Although regular hole saws will do the job, cutting thicker steel can cause the tool to become hot, quickly increasing wear on the cutting surface and significantly reducing product life. When cutting thicker steel, consider using a carbide tipped hole saw designed specifically for deep cutting of steel up to 25mm thick. This operates at a higher speed for a faster cut, preventing the saw from getting hot and wearing down. By taking such precautions contractors can increase the lifespan of their power tool accessories and deliver a higher return on investment. 4. Cut out unpleasant fumes A debris collector attachment that can catch the dust and debris created during the cutting process. Composite and engineered wood, including medium density fibreboard (MDF), might provide a versatile, lightweight and strong building material for a variety of applic ][ۜ8$HX[][۝Xܜ[\YH]ۙHوBY\]Y]\و\Y\\]BX[[\ˈ[YXZ[Z[[HX[ܚ[[\ۛY[\HX]و[Y\[K]\[]]XH][؜[XH^\\[X\]YYHX[Y\Y\\˂X[H][ۜ]HY[YY [Y[H\]\[Y[[H[\[\\[[Y[[[X][HX[\ˈYX\ZH\HZYܚ[܈[\H\܈ۙHٙ؜]][XYH[\\܈[ܙB\^܈\XX\X\\BY\ZYH[Y \[ۛHH[[\[HXX[]K]Z[\BXH[܈وH\B\[X\XY[]][X[Z[\K[[YH\[Hۂ[\˂[][܈][\[B[[\ HX\X܂]XY[][]H\[X\ܙX]Y\[H][\XYH܈X\H\[ [XZH[œ]X[\\ۛH\\]ZX\][YH]YۈX[\ ][™[[Z[]\HYYX\Y\\X\œ[܈][܈][[][B[ܙ\و\[X\[[\\8&\[܈\[˂]H؈ۙB\H\X\ۈ܈Y[\[X]\X[[\YۈXH][H^HوY\[HXY][œ\X[ۋ]H]H[[Z]H[B[وH]XX[\Y[Hق[Y\[^HZXYوH\H[]H؈ۙH]]\KݙH[YH\]X[B[Y\ [  MYX\Y˜Y\][\HۜYܙYH[\[\XX[\[[X\][\H[]\[\\[Y[BZ[[[]\]KۈBHوX\][X[Y\܈\][ KZHH\[x&\R˜[]\X[XX\\[œ\X\ܚY\H]˜[Y]HXܜ˂̂KL̈8$\] [ ̂N ̌ M L͂