Hand tools — direction of cutting for a hacksaw blade For a standard hand hacksaw used in fitting and bench work, during which stroke does the blade perform the effective cutting action?

Difficulty: Easy

Correct Answer: forward stroke

Explanation:


Introduction / Context:
A hand hacksaw is a basic shop tool for cutting metals. The orientation of the teeth determines whether cutting occurs on the push (forward) or pull (return) stroke. Proper setup reduces effort, improves accuracy, and extends blade life.



Given Data / Assumptions:

  • Standard hand hacksaw frame and blade with teeth pointing away from the handle.
  • Correct blade tension and typical tooth set for metal cutting.
  • No special draw-saw or pull-saw variant is considered.



Concept / Approach:
In the usual configuration, hacksaw teeth point forward (away from the handle). The blade therefore cuts on the forward (push) stroke when the operator drives the teeth into the work. The return stroke lifts pressure to avoid dulling and to clear chips. Some specialised frames or user preferences can reverse the blade for pull cutting, but that is not the common workshop practice.



Step-by-Step Solution:
Check tooth direction: points forward.Apply feed pressure on forward stroke; relax on return.Thus, cutting action is on the forward stroke.



Verification / Alternative check:
Observation of chip formation and sound confirms that the blade bites during the push stroke while the return stroke is largely idle.



Why Other Options Are Wrong:

  • Return stroke: incorrect for the standard setup.
  • Both strokes: true for some double-cut tools, not for a conventional hacksaw.
  • Depends only on force direction: tooth orientation is decisive.
  • Teeth do have set; this affects kerf width and clearance, not the cutting direction.



Common Pitfalls:
Over-pressing on the return stroke causes blade chatter and premature tooth wear. Maintain light pressure while returning.



Final Answer:
forward stroke

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