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(Total 1 Products for Hss Drill Bits For Multiholes)
HSS Step Drill Bit Double Cutting Blades10 Sizes
Twist drill how to maintain 1.At the beginning and end of the drilling, the feed should be reduced by 1/3. 2. When drilling, a large number of fine powder materials, such as cast iron and copper, can not use coolant, and the use of compressed air to help chip removal. 3. Please remove the entanglement in the drill...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.