Lathe dog

Straight leg carriers. The setup shows the drive plate, workpiece and carrier setup between centers on lathe

Bent tail lathe dog hooked on chuck jaw.

A lathe dog, also known as a lathe carrier, is a device that clamps around the workpiece and allows the rotary motion of the machine's spindle to be transmitted to the workpiece.

A carrier is most often used when turning between centers on a lathe, but it may be used on dividing heads or any similar situation. It is used in conjunction with a drive plate and drive pins: the plate is mounted directly on the machine spindle (as with a chuck) and the drive pin is attached to the plate. In use the carrier and workpiece are inserted between centers and the leg of the carrier rests against the drive pin.

Carriers may be of the straight leg or bent leg type. The straight leg requires the drive pin, the bent leg fits into a slot machined into the drive plate. The bent leg type is considered safer as there are (slightly) fewer protruding parts to cause accidents.

Spindle speeds are reduced when working with carriers, due to the unbalanced nature of the setup. Care must also be taken by the operator when using carriers, as it is easy to get snagged on one.

Machining and computing

Computer-aided engineering	2.5D CAD CAM G-code Numerical control (NC and CNC) Stewart platform

Drilling and threading	Die head Drill Drill bit Drill bit shank Drill bit sizes Drilling List of drill and tap sizes Tap and die Tap wrench Threading

Grinding and lapping	Abrasive Angle grinder Bench grinder Coated abrasives Cylindrical grinder Diamond plate Flick grinder Grinding Grinding dresser Grinding machine Grinding wheel Jig grinder Lapping Sanding Sharpening stone Spark testing Surface grinder Tool and cutter grinder

Machining	Boring Broaching Electrical discharge machining Electrochemical machining Electron beam machining Endmill Engraving Facing Hobbing Jig borer Machine tool Machining Metal lathe Milling cutter Milling machine Pantograph Photochemical machining Planer Reamer Rotary transfer machine Shaper Turning Ultrasonic machining

Machine tooling	Angle plate Chuck Collet Fixture Indexing head Jig Lathe center Machine taper Magnetic base Mandrel Rotary table Wiggler

Terminology	Cutting fluid Machining vibrations Speeds and feeds Swarf Tolerance Tool and die making Tramp oil

This article is issued from Wikipedia - version of the 2/4/2014. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.

Lathe dog

See also