Indexable Lathe
Jig Grinder
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A jig grinder is a machine tool used for grinding complex shapes and holes where the highest degrees of accuracy and finish are required.
The jig grinder is very similar to a jig borer, in that the table positioning and spindles are very accurate (far more so than a manual milling machine or lathe). It is almost exclusively used by tool and die makers in the creation of jigs or mating holes and pegs on dies. There are usually many peripheral elements to a large jig grinder, including separate hydraulic motors, air compressors, and various cooling systems for both the hydraulic circuit and supplying coolant to the work and machine itself.
The machine operates by a high speed air spindle rotating a grinding bit. The air spindles are removable and interchangeable to achieve varying surface speeds. Some spindles are fixed speed (60000 rpm), others are adjustable (30000-50000 rpm), and still others are very high speed (175000 rpm). The machines have a standard X-Y table with the notable exception of knee travel. All axes are indexed to .0001″ via a vernier scale on the handwheels, with higher accuracy available with the use of measuring bars. The machine head has two vertical travels, one rough head adjustment and the other a precise spindle adjustment. The spindle to which the detachable air spindle mounts also rotates at a variable speed and can typically outfeed .100″ while running, again with an accuracy of .0001″ on the handwheel or greater, for very precise hole, peg and surface grinding. A well-kept jig grinder will reliably position work to a higher degree of accuracy than is possible with handwheels alone. These features are all critical in positioning a hole and peg system a precise distance from a reference surface or edge.
The most important factor on a jig grinder is the dual-spindle configuration. The main spindle is roughly positioned with between 1″ or 2″ of travel for setup, and then the .100″ of outfeed is used during machine operation to outfeed into the work. A spacer bar may be used between the grinder and main spindle, allowing large (9″ radius or larger) work to be completed. The main spindle has a wide range of speeds to ensure proper grinder feed rates are maintained.
See also
Angle grinder
Bench grinder
Cylindrical grinder
Flick grinder
Tool and Cutter grinder
Centerless grinder
v d e
Metalworking
Machining & computing
CNC, CAD, and CAM
2.5D CAD CAE CAM CNC G-code Numerical control Stewart platform
Drilling and threading
Die head Drill Drill bit Drill bit shank Drill bit sizes Drill and tap size chart Drilling Jig borer Pin chuck Screw thread Tap and die Tap wrench
Grinding and lapping
Abrasive Angle grinder Bench grinder Coated abrasives Cylindrical grinder Diamond plate Flick grinder Dresser Grinding Grinding machine Grinding wheel Jig grinder Lapping Sanding Spark test Surface grinder Tool and cutter grinder Whetstone
Machining and milling
Electrical discharge machining Electro chemical machining Endmill Engraving Hobbing machine Lathe Machine tool Machining Milling cutter Milling machine Planer Pantograph Shaper
Machine tooling
Angle plate Chuck Collet Jig Fixture Indexing head Lathe center Machine taper Magnetic base Mandrel Rotary table Wiggler
Terminology
Chatter Cutting fluid Cutting speed Swarf Tolerance Tramp oil
Casting Fabrication Forming Jewellery Machining Metallurgy Smithing Tools & Terminology Welding
Categories: GrindersHidden categories: Articles lacking sources from September 2009 | All articles lacking sources
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Lathe $86.03 A lathe is a machine tool which spins a block of material to perform various operations such as cutting, sanding, knurling, drilling, or deformation with tools that are applied to the workpiece to create an object which has symmetry about an axis of rotation. Lathes are used in woodturning, metalworking, metal spinning, and glassworking. Lathes can be used to shape pottery, the bestknown design being the potters wheel. Most suitably equipped metalworking lathes can also be used to produce most solids of revolution, plane surfaces and screw threads or helices. Ornamental lathes can produce threedimensional solids of incredible complexity. The material can be held in place by either one or two centers, at least one of which can be moved horizontally to accommodate varying material lengths. Other workholding methods include clamping the work about the axis of rotation using a chuck or collet, or to a faceplate, using clamps or dogs. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 140 Publication Date: 2010/06/05 Language: English Dimensions: 6.00 x 9.02 x 0.33 inches |
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Lathe (Metal) $71.7 High Quality Content by WIKIPEDIA articles A metal lathe or metalworking lathe is a large class of lathes designed for precisely machining relatively hard materials. They were originally designed to machine metals; however, with the advent of plastics and other materials, and with their inherent versatility, they are used in a wide range of applications, and a broad range of materials. In machining jargon, where the larger context is already understood, they are usually simply called lathes, or else referred to by morespecific subtype names toolroom lathe, turret lathe, etc.. These rigid machine tools remove material from a rotating workpiece via the typically linear movements of various cutting tools, such as tool bits and drill bits. The design of lathes can vary greatly depending on the intended application; however, basic features are common to most types. These machines consist of a headstock, bed, carriage, and tailstock. Better machines are solidly constructed with broad bearing surfaces slides or ways for stability, and manufactured with great precision. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 64 Publication Date: 2010/12/10 Language: English Dimensions: 6.00 x 9.02 x 0.15 inches |
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