Product Review

Specs

• Cutting Diameter: 1-7/8''
• Cutting Depth: 2"
• Shank Diameter: 3/4"
• Shank Style:Weldon Flat
• Number of Flats: 2
• Material:High Speed Steel（HSS）
• Finish/Coating:Bright
• Fits:Hole processing field such as engineering, rail transit, bridges, ships,machinery manufacturing, aerospace. Mild & Structural Steel; Aluminum;Stainless Steel (lower BHN)

Application

• The cutter is used for drilling through steel. They produce accurate burr-free holes to close tolerances without pre-drilling or step drilling. They can drill a much larger hole and requires less force and time than a standard twist drill bit.
• The annular Cutter offers superior holemaking capabilities. It cut faster, last longer, produces a better hole finish, a true round hole with very tight tolerances, can be re-sharpened and drills holes with less power and torque.
• Requirement to cutting rotate speed of annular cutter are also different for different diameters,and reasonable cutting rotate speed will prolong service life of annular cutter directly,So we recommend:1.The cutting speed:VC=20-25m/min 2.The reasonable rotate feed amount shall be fn=0.08-0.13mm/r 3.The reasonable feed rate shall be vf=36-60mm/min 

Notes

What Causes Dull or Broken Cutters?

• The primary cause of broken or prematurely dull cutters is a feed rate that is too slow. Slow feed rates will reduce the life of your cutter. Using a firm, steady feed pressure throughout the cut will maximize performance and extend tool life.
• Second reason why cutters break is movement of the drill or work piece. The cutter wall can easily be snapped if the drill and material is not held rigid.