The AT330ST is a robust portable thicknesser with a slightly greater width capacity, a more powerful motor and longer tables than most of the similar models on the market. The spiral planing block, which is powered by a 1,500W brush motor, is equipped with 56 TCT spur cutters giving a fantastic finish, especially on difficult figured timbers. This uses 15mm square x 2.5mm thick, four edged solid tungsten carbide spur type cutters, 40 in all arranged over four rows. These cutters are unique in that the edges are machined to a radius of 102mm; this coupled with how they are set on the block means that a shear type cut is achieved. This gives a very "kind" cut so that even figured timbers can be machined with little or no tearout. There are several advantages of this type of cutter block : Durability: each edge will last around 10 times longer than an HSS knife and you have four edges per cutter. Noise: spiral cutter blocks are notably quieter in use, up to 50% with some timbers. And the finish is silky smooth, without the usual lines across the board. Power: because of their shear type cutter action, the power saving can be as much as 30%, meaning much less strain on the machine and lower running costs. Extraction: this will also be more efficient because of the even shape of the chips, packing more into the waste sack. The planer block height is adjusted by a very precise control positioned conveniently on top of the machine and there is a scale on the front face for easy reference to the timber thickness. There are two other aids to controlling the timber thickness, one is a gauge on the front of the motor housing which indicates the depth of cut being taken. The other is a depth stop with presets (1/8", 3/8", 1/2", 3/4", 1" & 1 1/4") for finished board thickness. In addition, the planing block unit is equipped with a lock which removes any chance of the height setting altering during the planing operation. Although the AC330ST is fitted with increased length infeed and outfeed tables, it is recommended that a suitable roller stand is used for long planks for both safety and accuracy of the work. Roller stands are detailed within the Machinery section. Dust collection is via a shroud on the top of the block which is fitted with a 100mm diameter outlet for direct connection to a suitable chip collector. The AC330ST is a well built and substantial machine with plenty of power, and the unique spiral cutter block which should appeal to the more serious user.-bg
