A circular shaft having diameter 65.00−0.015+0.01

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A circular shaft having diameter 65.00^{−0.015^+0.01} mm is manufactur ed by turning pr ocess. A 50 m t hi ck coat i ng of Ti N i s deposited on the shaft Allowed variation in TiN film thickness is ±5 m. The minimum hole diameter (in mm) to just provide clearance fit is

1. 65.01
2. 64.95
3. 65.12
4. 65.10

Correct Option: C

Shaft = 65^{−0.05^+0.01} mm
Coating thickness ‘t’ = (50 ± 5)μm
To provide clearance fit, given condition should be satisfied,
(D_H)min ≥ ((D)shaft)_max ≥(Ds )_max + 2t_max

= 65.01 +	2 × 55	= 65.12mm
	1000