Item Name Covington Machines - Two-Station Closed Arbor 1" x 18" SKU COVTSA402 Description The Two-Station Closed Arbor 1"x18" is a bench-mounted lapidary arbor machine built around a rigid metal housing that encloses and supports a 1 inch diameter, 18 inch long arbor shaft. The closed design means the drive components are contained within the body, helping protect the bearings and drive system from water spray and abrasive slurry that are common in wet grinding and polishing. This style of arbor is constructed to accept expanding drums, grinding wheels, sanding belts, and polishing wheels on each end of the shaft, allowing two working stations on one machine. In lampworking and scientific glass work, a closed arbor is used as a dedicated coldworking station for shaping and finishing glass after it has been flame-worked or kiln-annealed. It is especially useful for dressing punty marks, flattening bases, smoothing sharp edges, refining seals, and polishing surfaces on components that must fit precisely. The 1 inch shaft size provides the stiffness needed for stable wheel tracking and consistent contact when working harder materials, and the ability to mount larger diameter wheels makes it a practical choice when you need more surface area and smoother cutting action during glass coldworking. How it is used Mount the arbor securely to a sturdy bench so the machine stays stable during grinding and polishing Install a compatible wheel, drum, or polishing head on each end of the arbor to create two dedicated stations Use water feed or controlled wetting to keep glass cool and to carry away abrasive swarf during grinding Grind and true glass surfaces such as bases, edges, and punty scars using appropriate grit sequences Switch to sanding and polishing wheels to refine the finish and reduce visible scratch patterns Clean and dry the machine after use to minimize corrosion and to keep abrasive slurry from building up around the work area Dimensions 20" x 8" x 10" 14 lbs. 6", 8", and 10" wheels fit
