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Recommended HSS cutting speed: turning brass Select the typical average cutting speed range for turning brass using a high-speed steel (HSS) tool under standard conditions. Choose the best range.

Difficulty: Easy

15 to 19 m/min
25 to 31 m/min
60 to 90 m/min
90 to 120 m/min

Correct Answer: 90 to 120 m/min

Explanation:

Concept/ApproachBrass is free-cutting and allows relatively high cutting speeds compared with steels for the same tool material. For HSS tools, a common shop range for turning brass is around 90–120 m/min.

NoteActual choice depends on tool geometry, rigidity, coolant, and surface finish requirements.

Final Answer90 to 120 m/min

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