Term
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Definition
| The radial distance from the pitch circle to the outside diameter. p760 |
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Definition
| teeth on a cone, are used to transmit motion between intersecting shafts. p763 |
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Term
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Definition
| refers to the initial forming or machining operations that produce a semi-finished part ready for gear cutting, starting from a piece of raw material. p764 |
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Term
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Definition
| having no tapered threads, is used to finish the few remaining threads at the bottom of the hole to full depth. p751 |
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Term
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Definition
| Another way to form cut teeth. All the toothe space are cut simultaneously and the tooth is formed progressively. p765 |
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Term
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Definition
| The distance between corresponding points of adjacent teeth, measured along the pitch circle. p760 |
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Term
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Definition
| has been highly developed and widely adopted in recent years. normally takes several rotations. |
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Term
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Definition
| similar to self-opening die heads in that the cutting elements collapse inward automatically when the thread is complete. p751 |
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Term
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Definition
| a special form of bevel gear having a 180 cone apex angle. (Teeth on the side of the disk) p763 |
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Term
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Definition
| The radial distance from the pitch circle to the root circle. Equal to the addendum plus the clearance. p760 |
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Term
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Definition
| The number of teeth per unit of pitch diameter. p760 |
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Term
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Definition
| Create internal threads in ductile metals. has a special cross section. p758 |
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Term
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Definition
| a basic method of machining a gear to mill out the space between the teeth using a cutter to machine the gear. p764 |
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Term
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Definition
| Only minute amounts of metal need removing. Done after primary machining or other heat treatments. p772 |
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Term
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Definition
| used to obtain very accurate teeth on hardened gears. p772 |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| generate gears by a reciprocating tool motion. p766 |
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Term
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Definition
| Added to wheels prevent slipping and to assure that their relative motions are constant. p758 |
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Term
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Definition
| neutralize side thrust by having, in effect, two helical-gear halves, one on the right-hand and the other a left-hand helix. p762 |
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Term
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Definition
| One long rack tooth that has been wrapped around a cylinder in the form of a helix and fluted at intervals to provide a number of cutting edges. p768 |
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Term
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Definition
| Involute gear teeth could be generated by a cutter that has the form of a rack. p768 |
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Term
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Definition
| generated by a point on a straight line when the line rolls around a base circle. p760 |
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Term
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Definition
| in the metric system it is always expressed in mm, and fractions of an inch in the American system. p742 |
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Term
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Definition
| corresponds to the diameter of the wheel. p759 |
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Term
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Definition
| all elements of the thread are based on this. p742 |
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Term
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Definition
| Holding six gear blanks move in a planetary motion about a large, central gear cutter. p768 |
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Term
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Definition
| has only a few tapered threads to provide gradual cutting of the threads to depth. p761 |
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Term
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Definition
| is a gear with infinite radius, having teeth that lie on a straight line on a plane. p762 |
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Term
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Definition
| Used for high speed production. Used instead on turret lathes. p749 |
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Term
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Definition
| have straight teeth and are used to connect parallel shafts. p761 |
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Term
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Definition
| has a tapered end that will enter the hole a sufficient distance to help align the tap. p751 |
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Term
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Definition
| refers to the manufacture of threads on external diameters. p741 |
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Term
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Definition
| Used to produce threads in substantial quantities. A cold-forming process operation in which the threads are formed by rolling a thread blank between hardened dies that cause the metal to flow radially into the desired shape. p756 |
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Term
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Definition
| the cutting of an internal thread by means of a multiple-point tool. p750 |
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Term
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Definition
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Term
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Definition
| similar to a screw. It may have one or more threads, the multiple-thread type being very common. p762. |
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Term
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Definition
| Used in conjunction with worms. Easy to obtain high gear ratios. p762 |
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