13 Sep Zeroplay Miter-Slot Slider Bars from Lee Valley
A little bit of slop in a jig can be more than annoying – it can create a cumulative error that results in rejected parts, poor joinery, and unprofessional results. Lee valley has started carrying a clever miter slot guide that can be adjusted easily and can be used to create jigs on any machine with a miter slot. With these miter bars, a woodworker can create an array of sliding jigs for table saws, bandsaws, router tables and other power-tool tables. And unlike typical table-slot runners, they use an adjustment mechanism that’s tightened from above, so one can fine-tune the fit without having to remove the jig from the table’s miter slot. This makes it a quick, straightforward process to eliminate lateral play in the slot, so jigs remain reliably square to the cutter. Once set, the low-friction runners slide freely in any standard 3/4″ wide by 3/8″ deep miter slot. Each is made of a rigid fiberglass-reinforced polymer with excellent dimensional stability, so humidity or temperature changes won’t compromise the exacting fit. Three brass inserts tapped with 8-32 threaded holes are spaced along the 9″ body for mounting jigs, handles or other components (three machine screws included).
Lee Valley offers the miter bars individually (item 03J8031) for bandsaws, router tables or other machine tables that have a single miter slot, as well as in pairs for use on table saws or other machine tables with two miter slots. Pairs of miter bars (item 03J8033) come with two miter stops (also sold separately) that permit precise, repeatable stopped cuts for blind dados and slotting, each with a threaded insert for mounting stationary fixtures such as hold-downs or feather-boards.
The miter slot bars are made in the USA and prices start at $16.95. The images here show two bars, two stops and the included hardware for mounting jigs on the left, and at right the device being adjusted from above without having to be removed from the machine. In the image, one of the two-part devices has been separated into its two components and one can see the wedge-shaped mechanism that allows it to be adjusted.
To see a WoodEzine design for a table saw feather-board, click here.