ships in 2 cartons: 30# and 28# - shipping cost calculated separately after you submit your order.
- Every part carefully designed and made for its intended purpose. No off-the-shelf or inferior parts or material.
- Rust free and virtually maintenance free.
- No clumsy heavy shims or boards.
- No chains, cables or cast-iron gears.
- Thickness infinitely variable from 0 to 2¾ inches.
- Slabs can be rolled in either direction and clay can be added or subtracted at any time.
- Roll slabs up to 16" wide. The length of the slab is limited only by the space and canvas available.
- Tapered slabs are quick, easy and precise.
- Warping, curling and cracking are drastically reduced.
- All machines accept press molds and a wide variety of texturing material such as burlap, plant materials, rope, cork and bark.
Like the other North Star slab rollers, the PortaRoller has two rolls, much like the wringer of an old-fashioned washing machine. Both rolls have a small diamond pattern ("knurling") machined directly into the metal to grip the canvas. The bottom roll is turned by the handle, but cannot move vertically. As it turns, it drives the top roll through a train of gears. The upper roll both turns and can be adjusted up and down. The two rolls turning together pull slabs through easily, and the vertical adjustment of the top roll gives an easy-to-set and infinitely adjustable thickness from paper-thin to over 2 inches. A reference scale allows setting and repeating openings to within 1/100 of an inch.
The design gives great flexibility in making slabs. Very thin, translucent porcelain slabs and thick, heavily textured architectural slabs are equally easy. A wide variety of other texturing materials and objects can be passed through the machine along with the clay. Slabs can be rolled either direction or reversed on all North Star machines.