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Calculate the Spindle Speed by (a) HSS tool (b) Carbide Tool
Calculate the spindle speed (N) if a C 20 steel job of 50 mm dia is to be turned by (a) HSS tool and (b) Carbide Tool.
Solution
(a) D = 50 mm
From table above
The cutting speed for C 20 steel Vc = 40 m/min
We know
V c = π DN/1000 m/min
N = (Vc × 1000 )/ π D = (40 × 1000 )/ π × 50= 254.54 rpm
∴The spindle speed should be N = 254.54 rpm when an HSS tool is used.
(b) D = 50 mm; Vc = 150
N = (Vc × 1000 )/ π D = (150 × 1000) / π × 50= 954 rpm
∴The spindle speed should be N = 954 rpm when an carbide tool is used.
Table 7: Cutting Process Parameters for Turning
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