| Many industrial concerns have workshops of their | | | | point. The lathe and shaping machine use single point |
| own. For the | | | | cutting tool |
| repair of worn shafts, the lathe machine is excellent. | | | | while the milling and drilling machines use |
| Keyway | | | | multiple-point-cutting |
| slots can be machined by using a milling machine, | | | | tools.Metal is cut either by moving the work piece |
| while a | | | | like in the lathe or |
| shaping machine can do machining of large flat areas. | | | | by moving the tool like in the shaping machine, drilling |
| A | | | | or |
| drilling machine does drilling of holes.A skilled | | | | milling machine. Clearance angles must be provided to |
| Maintenance Engineer should know how to use all | | | | prevent the |
| these | | | | tool surface below the cutting edge from rubbing |
| machines in order to make his own repairs in a safe | | | | against the work |
| manner. Very | | | | piece. Rake angles are often provided on cutting |
| often he has to supervise machinists. The | | | | tools to cause a |
| information below | | | | wedging action in the formation of chips and to |
| should be useful for that purpose.Lathe MachineThe | | | | reduce friction and |
| lathe machine uses a single-point-cutting tool for a | | | | heat.Tool MaterialsIn order to remove chips from a |
| variety | | | | work piece, a cutting tool must be |
| of turning, facing, and drilling jobs. Excess metal is | | | | harder than the work piece and must maintain a |
| removed | | | | cutting edge at the |
| by rotating the work piece over the fixed cutting | | | | temperature produced by the friction of the cutting |
| tool to form | | | | action.Carbon SteelCarbon steel tools even though |
| straight or tapered cylindrical shapes, grooves, | | | | comparatively inexpensive tend to |
| shoulders and | | | | lose cutting ability at temperatures around 400 |
| screw threads. It can also be used for facing flat | | | | degree F (205 |
| surfaces on | | | | degree C).High-Speed SteelHigh-speed steel, |
| the ends of cylindrical parts.The work piece is | | | | containing 18 percent tungsten, 4 percent chromium, |
| clamped onto a horizontal rotating shaft by a | | | | 1 percent vanadium, and only 0.5 to 0.8 percent |
| 3-jaw or 4-jaw chuck. The latter chuck can be used | | | | carbon, permits the |
| to cut | | | | operation of tools twice or three times the speeds |
| off-centered cylinders. The rotating horizontal spindle | | | | allowable with |
| to which | | | | carbon steelCast AlloysCast-alloy cutting-tool |
| the chuck is attached is usually driven at speeds | | | | materials containing cobalt, chromium, and |
| that can be | | | | tungsten are effective in cutting cast iron and |
| varied.The cutting tool is fixed onto a tool rest and | | | | retaining their |
| manipulated by | | | | cutting ability even when red hot.Cemented |
| hand. It can also be power driven on straight paths | | | | Tungsten CarbideThe hardness of Tungsten Carbide |
| parallel or | | | | approaches that of a diamond. |
| perpendicular to the work axis. This is useful for | | | | Tungsten carbide tools can be operated at cutting |
| screw cutting.Internal turning known as boring results | | | | speeds many times |
| in the enlargement of | | | | higher than those used with high-speed |
| an already existing hole. The holes are more | | | | steel.OxidesCeramic, or oxide, tool tips consist |
| accurate in | | | | primarily of fine aluminum oxide |
| roundness, concentricity, and parallelism than drilled | | | | grains, which are bonded together. These are very |
| holes. A | | | | hard.Cutting fluidsAn overheated tool can become |
| hole is bored with a single-point-cutting tool that | | | | blunt and soft very fast. Therefore |
| feeds along | | | | very often, cooling fluids cools the cutting points of |
| the inside of the work piece.Shaping MachineThe | | | | the tool. This |
| shaping machine is used to machine flat surfaces, | | | | serves to lubricate and cool.Water is an excellent |
| grooves, | | | | cooling medium, but it corrodes ferrous |
| shoulders, T-slots, and angular surfaces with | | | | materials. Sulfurized mineral oil is one of the most |
| single-point tools. | | | | popular coolants |
| The cutting tool on the shaper oscillates, cutting on | | | | as it can both cool as well as lubricate. The sulfur |
| the forward | | | | prevents chips |
| stroke, with the work piece feeding automatically | | | | from the work from melting on to the tip of the |
| toward the tool | | | | tool.Move Closer To Financial Freedom!Best selling |
| during each return stroke.Drilling MachineThe drilling | | | | author of the megahits Nothing Down and Creating |
| machine is used to cut holes in metal with a twist | | | | Wealth, shares the secret of success. Generate |
| drill. By changing the cutting tool, they can be used | | | | wealth and |
| to do | | | | profit over $100,000 a year - on a part time basis, |
| reaming, boring, counter boring, countersinking, and | | | | working |
| threading.Milling MachineThe milling machine uses a | | | | from your home, on found money - using little or |
| rotating cutting tool to cut flat | | | | none of your |
| surfaces, grooves, and shoulders, inclined surfaces, | | | | own money. |
| dovetails, | | | | years of working experience in Marine, Facilities, |
| and T-slots. Cutters of many shapes are changed to | | | | Construction has given the author material for |
| cut different | | | | writing e-books |
| grooves.Cutting ToolsMetal-cutting tools are classified | | | | and articles related to engineering, and management. |
| as single point or multiple | | | | |