SKU: 1791213 Powermatic 15HH Planer

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. 

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 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. 

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 silkysmooth surface. A push/pull knob shifts between the feed rates on the fly. The rollers are driven by a gear and chain drive with an automatic chain tensioner, housed in a cast iron case. The gear section runs in an industrial style oil bath for maximum control over long-term wear.

For the ultimate in dependability, we designed a serrated steel infeed roller and a smooth steel outfeed roller. Both rollers and the chip breaker are precisely set at the factory but have user accessible adjustments that allow the user to keep the POWERMATIC 15HH perfectly tuned in years to come. We also provide infeed and outfeed roller spring tension adjusters that are accessible without having to disassemble the cutterhead covers. The operators’ manual included with the POWERMATIC 15HH has a full set of

illustrated instructions for making these adjustments. To enhance operator safety, we added a row of closely spaced anti kickback fingers. These steel fingers are gravity operated and require no adjustment. They automatically engage the wood as it enters the cutterhead and help prevent it from being kicked out. While the POWERMATIC 15HH is capable of 3/16”-deep cuts on most stock widths, a limiter

plate at the center of the cutterhead limits full-width cuts to 1/8” or less. Controlling full-width cut depth avoids applying excessive strain to the machine but also prevents damaging the wood. Deep cuts are far more likely to produce chipping and tearout

because of the extraordinary stress applied to the wood fibers.  

 

The main and extension cast iron table surfaces are precision ground for precise planning. The main table surface is 20”-long by 15”-wide and is fully captured on four round, 2”- diameter, precision ground steel posts. Each corner of the table is locked onto a lead screw within its post that controls the up and down movement. The lead screws are driven by a single chain through a gear drive. A large 6”- diameter cast iron handwheel with spinner handle drives the height adjustment mechanism. Each full revolution of the handwheel produces just over 1/16” of change to make the ultra fine adjustments necessary to hit a specific thickness easy to achieve. Though unlikely, the lead screws can be adjusted individually should the table ever get out of alignment. The table is locked in place by a pair of knobs each securing both lead screws at that end. The locking handles can be moved to either side of the POWERMATIC 15HH to make them more easily accessible if one side has limited access. A pair of rollers set into the primary table surface below the cutterhead help maintain smooth movement of rough stock through the POWERMATIC 15HH. The above table height of the rollers is easily adjustable. 

We also include a pair of 14”-long by 15 ¾”-wide cast iron extension tables rather than the roller types. When installed they bring the overall surface to 48” in length. The smooth surface of cast iron extension tables makes it easier to introduce wood into the machine, particularly when “training” one piece against the end of the one before it. They also eliminate the possibility of pinching a finger between the stock and a roller as the stock exits the machine. The cast iron extension tables mount to the primary table with bolts but have set screws below each of them that allow fine-tuning their surface to the primary table. This is a far more efficient system than trying to shim the extension tables to bring them into alignment with the primary table surface. Top Rollers To make moving the stock from one side of the POWERMATIC 15HH to the other for repeat cuts easier we added a pair of material rollers to the cutterhead. The iron rollers are spaced above the cutterhead, putting the often-heavy stock at a comfortable 43 1/2” above the floor.