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Table 1 Cutting parameters and their levels

From: Experimental investigation of surface roughness, flank wear, chip morphology and cost estimation during machining of hardened AISI 4340 steel with coated carbide insert

Parameters

Symbol

Unit

Levels

1

2

3

Cutting speed

v

m/min

100

160

220

Feed

f

mm/rev

0.05

0.09

0.13

Depth of cut

d

mm

0.2

0.4

0.6

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