Patent ID: 8256475

Claim:
A system for cutting joint elements in wood work-pieces comprising: (a) an electric router, the router including a substantially planar base; (b) a router bit comprising at least one cutter; and (c) an adjustable guidebush comprising: (i) a guide member comprising a through-bore that at least partially receives the router bit; and an outer guide surface that extends at least partially around the router bit; (ii) wherein the outer guide surface comprises at least a first outer diameter and a second outer diameter; (iii) wherein the first outer diameter is not substantially equal in length to the second outer diameter; (iv) wherein the through-bore defines a longitudinal axis and the outer guide surface is substantially parallel to the through-bore longitudinal axis; and (v) wherein the guide member extends from the substantially planar base of the router; wherein the adjustable guidebush is secured to the router and able to rotate with respect to the router when connected to the router such that the guidebush can be adjusted in use to alter the rotational position of the first and second outer diameters relative to the router; wherein said first and second outer diameters of the outer guide surface are configured to guide the movement of the cutter with respect to a cutting guide to form joint elements with varying fit between the elements from loose to tight.