61. In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called
62. The tap used to cut threads in a blind hole is
63. The method of grinding used to produce a straight or tapered surface on a workpiece, is
64. Glazing in grinding wheels can be decreased by
65. Internal gear cutting operation can be performed by
66. In plunge grinding
67. In reaming process
68. The addition of lead, sulphur and phosphorus to low carbon steels, help to
69. In an interchangeable assembly, shafts of size 25.000 -0.010⁺⁰∙⁰⁴⁰ mm mate with holes of size 25.000 -0.020⁺⁰∙⁰³⁰, the maximum interference (in microns) in the assembly is
70. In order to obtain a surface finish in the range of 0.75 μm to 1.25 μm , the operation used is called.
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