The AX3-21 is bore mounted and covers a range of flanges from 75mm (3”) internal diameter to 533mm (21”) external diameter. Depending on the flange bore size, rapid and effective internal mounting is achieved via a unique system of collets, or by a spigot base for the larger diameters. The cutting tool feed assembly consists of four rails and a crosshead with a swivelling tool post that are supported by precision linear bearings, providing both rigidity and extreme accuracy. The feed gearbox provides two cutting tool feed rates and is supplied with an additional lead screw to provide a total of four feeds. The machine is driven by a 0.8kW (1.1hp) pneumatic motor mounted either vertically or horizontally if space is restricted.

Mounting System

For bore diameters up to 6 " a unique system of collets is used, permitting very rapid and precise mounting. Fine adjustments can be made both vertically and radically. For bore diameters between 6 " and 10 " the collets are replaced by a triangular extension base. Adjustable clamps are fitted to the corners, or alternatively to the straight faces of the triangular base. These permit fast centring in the bore before the machine is mounted.

Drive Ring

The Silk AX321 machine is driven by a 0.85 hp pneumatic motor. This fits vertically to the drive hub, which provides direct drive input to the gearbox.

Feed System

The feed assembly consists of four feed rails and a crosshead supported by precision linear bearings, which assure a high degree of rigidity and accuracy.
The tool post can be fitted to either side of the crosshead.

The Finished

By using two gear ratios and two interchangeable lead screws, four distinct finishes can be achieved. Intermediate finishes can be obtained by varying the cutting tools.