How to define Swing over Bed, Swing over Cross Slide and Swing over Gap?

Lathe turning is one of the most frequently used machining technology. To order a proper size of lathe machine with correct specifications, swing is first considered since it represents the diameter allowance for workpiece.
Height of center line is center height. Center height is the key to form different swing sizes.

 

There will be several possible swings: Swing over bed, swing over cross slide and swing over gap:

SWING OVER BED

Swing over bed is also swing over Z axis guide way (longitudinal guide way). Annn Yang Lathe creates the machine model names by Swing over bed for easy identification. The X axis travel (cross travel) is also designed for possibility of turning max. diameter of workpiece upon swing over bed.

SWING OVER CROSSSLIDE

Swing over cross slide is diameter allowance upon the cross slide (or worktable). When workpiece is long and cross slide has to go through the workpiece for outside turning, such as still roller, pipe etc., it is necessary to consider swing over cross slide. The swing over cross slide will be smaller than swing bed.

SWING OVER GAP

Some lathe machines have the design of gap on bed to allow workpiece bigger than swing over cross slide. But this gap is created by removing gap block and take some distance of Z axis guide way. Therefore, only for some special flange type workpiece the customer will ask for gap on bed. Normally lathe with gap is for facing machining.

Swing over gap is available and optional for all Annn Yang lathe models.