It came with a motley assortment of the vintage cup and valve grinding/refacing stones, an additional quill with long tapered spindle for internal grinding, and buffing (often missing from these kits), a full set of unused internal grindstones, and a spare drive belt.
When new, this grinder must have cost a considerable sum.
The motor spins at 2800 RPM and the spindle speed can be geared up or down using various diameter pulleys as required.
Hereâs a photo of it with the internal quill mounted, to center my external chuck jaws.
Both the main shafts have been specially designed, and the worldwide precision bearing is used to fit the main shafts which are made of alloy steel heat-treated for high wear resistance, precision. as well as maintaining the lowest temperature for durability and stability.
The motor base and the spindle bushing are adjustable.
The motor is well designed with a special and nice appearance. The RMP of this motor varies depending on the size of the workpiece.
This grinder is capable of grinding the workpiece to a minimum of 3mm in outer diameter and from 2mm up in inner diameter(bore) with the accuracy within 0.003mm and a wheel finished surface(supplied with special attachments)
The spindle bushing is made of cast iron and supported by three surfaces. Therefore, it is durable and elastic.
Materials such as steel, iron, copper, aluminum, cast iron, plastics, porcelain, marble, regardless of being heat treated or not, can be ground on this machine which functions lie a cylindrical grinder. So it may lower the cost of production.