Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . one-eighth inch to a foot in length, and the same must be given to the key-seat in the boss of thewheel, and not to the key-bed in the shaft. Fig. 2511 illustrates the method of keying a wheel to a square shaft. It is used for shafts that 214 KIBBLES. 2513. 2514. B UlJ n. \i. are not planed or otherwise made true. The wheel is hung upon the shaft, and four temporary keys,having heads as shown in Fie 2512 at /«, with which to withdraw them from the wheel, are inserted inthe spaces a, a
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . one-eighth inch to a foot in length, and the same must be given to the key-seat in the boss of thewheel, and not to the key-bed in the shaft. Fig. 2511 illustrates the method of keying a wheel to a square shaft. It is used for shafts that 214 KIBBLES. 2513. 2514. B UlJ n. \i. are not planed or otherwise made true. The wheel is hung upon the shaft, and four temporary keys,having heads as shown in Fie 2512 at /«, with which to withdraw them from the wheel, are inserted inthe spaces a, a a, a, Fig. 2511. (It may be mentioned here that similar heads are generally forged upon keys to facilitate their withdrawal whilefitting them to their seats, the head being cutoff after the key is finally driven home.) Thesesustain the wheel while the permanent keys b,eight in number, are fitted, the wheel being ro-tated and tested for truth from a fixed point,the fitting of the keys serving to true the keys are simple pieces of steel, soshaped as to reverse the draft of a keyway,and are made male and female, as shown inFig. 2513, A representing the male and B thefemale. The manner of using them is to in-sert them into the keyway, as shown in Fig. 2514, in which A represents a taper rod end, B thesocket into which A is fitted or keyed, C the male and D the fema
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