Lathework (Junior Cert Engineering): Flashcards
📚Flashcards
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15 cards from this deck
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Practise the cards
15 cards from this deck
Primary purpose of a centre lathe
Primary purpose of a centre lathe
Turning operations to create cylindrical shapes
Basic operating principle of a lathe
Basic operating principle of a lathe
Workpiece rotates, cutting tool removes material
Material of lathe bed
Material of lathe bed
Rigid cast iron
Function of headstock
Function of headstock
Houses main spindle and gear systems
Three-jaw chuck mechanism type
Three-jaw chuck mechanism type
Scroll mechanism - all jaws move simultaneously
Advantage of four-jaw chuck over three-jaw
Advantage of four-jaw chuck over three-jaw
Greater accuracy
Why dead centres must be hardened
Why dead centres must be hardened
Workpiece rotates against them, causing wear
Included angle of lathe centres
Included angle of lathe centres
60 degrees
Key advantage of HSS tool bits
Key advantage of HSS tool bits
Can be reground when dull
Key advantage of carbide inserts
Key advantage of carbide inserts
Superior heat resistance, higher cutting speeds
Effect of tool at centre height
Effect of tool at centre height
Provides rake and clearance angles as ground
Facing operation tool movement
Facing operation tool movement
At right angles to axis of rotation
Parallel turning tool movement
Parallel turning tool movement
Parallel to workpiece axis
Purpose of knurling
Purpose of knurling
Creates pattern on surface for improved grip