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Showing posts with the label Three essentials in sharpening a twist drill

Power transmission System of a Grinding Machine

Introduction of  grinding machine: Grinding Machine: A grinding machine is a machine which employs a grinding wheel for producing cylindrical, conical or plane surfaces accurately and economically and to the proper shape size and finished.   Grinding machine is a type of machining using an abrasive wheel as the cutting tool. The surface stock is either removed by feed the work against the revolving wheel against workpice.  Power transmission System of a Grinding Machine: Motor   →   Pulley     →   Pulley   → Grinding Wheel. Three essentials in sharpening a twist drill: i.                    Drill point angles must be equal where each is 59   ͦ   and total angle is 118 ͦ. ii.                  Cutting lips of equal length.  iii.               Correct clearance behind the cutting lips   which is 8-12   ͦ