A turret lathe has six-usual tools arranged in the order of use on a rotating turret which is cycled by a large wheel or (Turnstile) like contrivance- in fact some lathe makers calle them Turnstile lathes. the British prefer the term Capstan lathes, the Capstan being that old extended bar device ( somewhat resembling a turnstile) used by seamen to manually raise the anchor- in old Pirate films, etc. The Capstan or Turnstile is oriented vertically, like a steering wheel. they usually have six stops on a hexagon turret. For this reason, a number of automobile makers had hexagonal trademarks such as Essex and Packard- a mark of homage to the machines used to make the parts!- the Turret Lathe.
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An engine lathe can be a gap bed lathe. The term "gap bed" refers to a lathe where a section of the bed next to the head stock is removable to enable the machining of large outside diameter work pieces.
A turret lathe has a toolholding turret in place of a tailstock. The tools in the turret can be used to perform multiple cutting operations without the need to change tools, while when operating a conventional engine lathe, changing tools is necessary.
The centre lathe has only one coaxial tool, whereas the capstan has a rotating multi tool station with indexer and clutch.
difference between lathe and drill machine doing full on piece of metal
They are essentially the same machine. Capstan is British usage, Turret, US. One old and still technically correct usage of Capstan was the (Turnstile winch) were Bars were extended and seamen walked round and round to weigh the anchor. Almost certainly this inspired the lathe term, as this is a maritime country (UK). The Wheel or circular component on a capstan lathe, however is usually three spoked and Vertical and drives the ram ( containing the usually hexagonal turret- 6 tools) back and forth into the work. They are or were very popular in the automotive sector for fabricating standard parts.
All turret lathes have rods. These rods are called feed rods and their purpose is to transfer mechanical power from the main drive and gearbox of the lathe to the apron attached to the saddle. This enables automatic movement of the saddle enabling unassisted cutting of a workpiece once the feed is engaged.
Lathe specifications· Distance between centers· Swing over the bed· Swing over the cross slide· Horse power of the motor· Number of speeds