Abstract: An elongated horizontal workpiece support is provided and an elongated lower support arm extends transversely beneath and is oscillatably supported, centrally intermediate its opposite ends, from the longitudinal central portion of the workpiece support. One end of the support arm includes an upright standard supported therefrom and projecting upwardly above the workpiece support. An upper support arm is secured at one end from the upper end portion of the standard and extends over the workpiece support and generally parallels the lower support arm disposed beneath the workpiece support. A depending mount is slidably mounted on the upper support arm for guided movement therealong and a powered rotary saw blade is journaled from a lower portion of the depending mount with the saw blade disposed in an upright plane containing the upper support arm.