Metal Lathe

The metal lathe is a lathe on which the cutting tool isn't held by hand but runs on a slide-mounted carriage. The "metal" in the name signals customary use, not a limit; ebonite, acrylic, and briar are all worked comfortably on the same machine. Within pipe making, the machine's value comes through most clearly on the jobs that most need dimensional precision: the diameter of the mortise, the axis of the bowl, the face of the shank. Setups vary from workshop to workshop; some makers get by with a single lathe, others keep several, each set up for a different job.

How It Differs From a Wood Lathe

On a wood lathe, the maker's own hand holds the tool; the machine offers nothing more than a horizontal tool rest, and shape is entirely up to the hand's judgment. On a metal lathe, the tool is mounted on the carriage and cross slide. This setup constrains the tool's movement, producing cylindrical and tapered surfaces with a repeatability hand work can't match; the top slide, in turn, sets the tool to whatever angle the workpiece requires. A heavier body and tighter manufacturing tolerances round out this precision. When a mouthpiece tenon needs to seat into the shank socket with zero play, the difference is felt directly.

Size and Choosing a Lathe

Lathe size is given by two numbers: the largest workpiece diameter that can swing over the bed, and the distance between headstock spindle and tailstock. A lathe with a 9-inch swing and 20-inch center distance is considered full-size for pipe work; both stummel and mouthpiece are worked on this size. Seven-inch benchtop lathes suffice for mouthpiece work, though a short-bed model can leave a long mouthpiece blank cramped. A known example in this class is Taig, a micro-lathe line made in Arizona, used in workshops mostly for turning mortises and mouthpiece inlay work.

Makers drawn to older machines are far from few. The 9-inch model from South Bend Lathe Works, founded in 1906 in South Bend, Indiana, proved so popular that other manufacturers from England to Brazil turned out near-identical copies; records indicate the firm produced 47 percent of the engine lathes sold annually in the United States in 1930. Old American names like Atlas and Logan also come up frequently in workshop conversations. In England, Myford's ML7, from the company founded in Beeston in 1934, and its improved successor the Super 7 released in 1953, have set the standard in small-scale machine making; for heavier work, Colchester lathes — folded into the 600 Group in 1954 — stand out instead. It's said that a large share of new lathes made in China and sold under importer brand names come off the same factory line, with the difference between them often amounting to little more than the nameplate and included accessories; stripping down and cleaning such a lathe and reassembling it with a good lubrication pass is a common first job.

The Jobs It Handles in the Workshop

A chuck (Jacobs chuck) mounted on the tailstock bores the tobacco chamber, mouthpiece socket, and smoke channel on the axis of rotation; the same setup also faces off the shank. The order and dimensions of these holes are covered in drilling on the lathe. On most lathes the tailstock and headstock spindle sockets are cut to a Morse taper. This taper, developed by Stephen A. Morse in the mid-1860s, self-locks under pressure; standardized across eight sizes from MT0 to MT7, it lets chucks and centers be fitted and removed in a single motion.

Which chuck to use depends on the job. Three-jaw self-centering chucks, with their jaws tied to a shared spiral gear, quickly center a cylindrical mouthpiece blank. In four-jaw independent chucks, each jaw moves separately; this lets a squared-off briar block be gripped and the block offset from center to set the angle for a bent pipe. Some of the chucks made specifically for briar blocks are known as J. T. Cooke-style; in these, the block is turned on locating pins so the bowl axis aligns with the smoke channel.

The lathe's work doesn't stop at drilling. The carriage and cross slide can be used for rough-shaping the stummel. In the shape-first-then-drill method, where the stummel is shaped before drilling, the bit is instead mounted on the headstock spindle and the stummel is brought up to the turning bit by hand. When a tool rest resembling a wood lathe's is fitted onto the slides, hand-held wood-turning tools can also be used. A sanding disc and felt wheel mounted through the spindle bring the shaping and polishing stages onto the same lathe as well. How mouthpiece material behaves on the lathe is covered in mouthpiece materials; part names are covered in pipe anatomy.