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The ability to accurately dimension wood with parallel faces is crucial to virtually any woodworking task. Producing an ultra smooth, tear out-free surface at the same time is just as important. The POWERMATIC 15HH has been designed to handle these tasks with the accuracy, durability and repeatability you need. Robust construction, a powerful motor, precision cut depth adjustments and the legendary Byrd. helical cutterhead are just some of the reasons the POWERMATIC 15HH is setting the standard for modern planers. Built around a fully enclosed, welded steel base cabinet, the POWERMATIC 15HH uses numerous precisely machined iron castings to insure durability and precise, repeatable operation. A heavy-duty caster system built into the base makes moving the 517- lb POWERMATIC 15HH around the shop easy. A foot-operated brake locks the casters to keep it stationary during use. Should lifting the POWERMATIC 15HH be necessary, four pull-out rods are built into the cast iron base. These rods provide safe lifting points for straps or forklift arms. A powerful 3HP, (continuous duty rating) 1PH, 230V TEFC (totally enclosed fan cooled) motor is mounted within the base cabinet. Power is transmitted to the fixed cutterhead assembly by three v-belts that turn precision-machined pulleys. A full-length belt cover is easily removed for maintenance by spinning off a pair of finger-operated knobs. The motor is operated and protected by a true magnetic switch mounted on the head assembly within easy reach. Byrd. Helical Cutterhead The Powermatic 15HH comes with a genuine Byrd cutterhead. There are many cutterhead designs that carry the helical moniker, including simple straight blades broken into segments and dispersed around the cutterhead cylinder. However, despite the name, they retain many of the liabilities of the long blade designs. While designing the POWERMATIC 15HH we wanted to incorporate the finest cutterhead available to insure the unmatched performance of a true segmented, shear-cutting helical head. That criteria meant the choice was very simple. POWERMATIC teamed with Tom Byrd and installed his famous, US-made Byrd. helical cutterhead in the POWERMATIC 15HH as standard equipment. The Byrd. cutterhead is made from a billet of exotic “stress proof” steel that insures unrivaled durability. The Byrd. cutterhead is so effective because its 74 carbide inserts are arranged in spiral-shaped rows. The inserts have a 4” radius ground into them and are mounted so they approach the wood at a 14-degree angle. That creates a true shear cut that eliminates much of the impact and the resulting fiber disturbance other cutterhead designs deliver to the wood. The Byrd. cutterhead cuts so efficiently that it makes surprisingly little noise when cutting wood. In fact, it is so quiet, new POWERMATIC 15HH users often think it is not cutting wood at all - until they see the results. The shearing effect of the Byrd. cutterhead produces a remarkably smooth surface on even heavily figured wood. The spiral layout of the Byrd cutters (left) insures a true shear cut that is exceptionally clean while reducing stresses imparted on the wood. Each carbide insert (right) has four identical edges, substantially increasing the useful life of an already extraordinarily tough cutter. The Byrd. cutterhead inserts are precisely machined from solid high-grade carbide, each with four identical cutting edges. If an edge eventually goes dull, you simply index it to the next cutting edge! Each insert has a marking at one edge that makes indexing all or any number of them the same way very easy, though needing to do that is unlikely. Because the inserts themselves and the seats into which they fit are so precisely machined, there is no adjustment or “fitting” necessary. Indexing or replacing an insert takes just seconds. Simply loosen the T25 Torx screw (wrench included), turn the insert to its new position and tighten the screw. The durability of the carbide combined with the low impact, shear cutting action mean the Byrd. inserts have an extremely long life, far exceeding that of straight blades. The potential life span of these carbide inserts means that many workers may go years before having to index them. Should a hidden piece of metal be encountered and actually damage a few of the carbide inserts only those need to be indexed or replaced. Just in case you accidentally plane a metal object, we include a package of ten spare inserts and a wrench with the POWERMATIC 15HH. Feed & Rollers A special serrated infeed roller keeps the stock moving consistently under the cutterhead. A smooth steel outfeed roller helps the wood exit without damage to the freshly planed surface. The POWERMATIC 15HH has two material feed rates –20 FPM (Feet Per Minute) used primarily for rough dimensioning and 16 FPM to increase the cuts-per-inch to create a silky- smooth surface. A push/pull knob shifts between the feed rates on the fly. The rollers are driven by a gear and chain...