INProfile Issue 5 | Page 15

sub-bases offset trenching base djusting the position of a straight edge or guide to widen a cut is not only time consuming but can easily lead to misalignment. One simple method of avoiding this is to use an Offset Trenching Base, a six sided sub-base fitted to the base of the router. Each edge produces an increase in width of 1mm, starting from a datum point of 100mm from the centre of the cutter/router base to the edge of the template. Drilled to the Trend base configuration, the base is supplied with two mounting screws and a centring cone for aligning the cutter aperture concentric to the cutter axis. The trenching base is used in conjunction with a straight edge such as a T-square or selfclamping Clamp Guide. The trench or housing is first ‘set off’ parallel from the straight edge by a dimension equal to the distance between the tip of the cutter to the datum edge of the trenching base i.e. 100mm minus half the cutter diameter (e.g: using a 20mm cutter, 100mm - 10mm = 90mm from the straight edge to datum edge of the trenching base). To further increase the width of the initial 20mm wide trench by up to 5mm, simply turn the router so that the 101, 102, 103, 104 or 105mm edge is in contact with the straight guide. TEMP/OTB/A____________£19.95 A offset base alance is all-important when routing on the edge of a workpiece or along narrow widths, as any tilting of the router will result in uneven or varying depth edge profiles. Often this can be rectified by making a second pass, but can result in having to rout a deeper or wider profile if the material dimensions or the application permits. To eliminate this risk, it is common practice to fit an offset sub-base to provide a larger base area on the workpiece and therefore better balance and control. The base is ideal for all edge routing applications as well as acting as a support plate when spanning jointed frame or carcass members. The Trend Offset Base is made from clear PETG plastic for both strength and visibility and can be fitted to any TBC router base, or can be drilled to suit other routers. IP OFS/BASE ______________£19.95 B Trend Base Configuration -TBC Router mounting points on all Trend sub-bases, mounting plates and jigs are pre-drilled to suit the standard Trend / Elu / DeWalt base configuration. This is denoted on conforming products by this symbol. For other makes of router, these products may need to be re-drilled by the user to suit alternative base configurations. 15