Workshop Technology
A hacksaw blade cuts on the

Both forward and return strokes
Forward stroke
Return stroke
Cutting depends upon the direction of force

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Workshop Technology
A jolt machine is used to

Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Produce uniform packing of sand in the mould
Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform sand hardness throughout the mould

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