discount 70% in 2018-09-23 to 2018-09-25
price: USD$ 26.32
freight :USD$7.00,(Postal parcel)
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1: concentricity: our company produces concentricity precision tapping machine chuck, not to hurt the drill, tap. Inferior chuck concentricity difference easily broken drill bit or the tap.
2: gripping strength:The clamping force is capable of preventing the rotation in the tap chuck. Chuck I produced all the 65Mn spring steel multi processing high standard manufacturing, with holding high strength, strong durability and other advantages. Chuck is used in domestic inferior inferior steel, cut corners, no quality guarantee.
3: heat treatment testing: my company the chucks are after heat treatment and heat treatment report issued, even inferior chuck heat treatment of this process are not. The deviation of hardness is also prone to lead to fracture phenomenon.