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1.the head of tungsten carbide tip is fired by vacuum, 2.the product has passed the ISO9001/2008, 3.its called coal auger bit - details see: https://www.machineto.com/proven-reliability-surface-coal-auger-bit-10317495

Proven Reliability surface coal auger bit

Physical Description:	Steel Body, made by material 40Cr or 42CrMo, heat treatment with 40-44HRC hardness, has high toughness and wearable character. Tip is made from Low press Sintered, and Suitable Grade Selected according to the Target Projects, Which are to make sure the good performance during working.
For Areas Using:	Foundation creation Solid wall Water well drilling
For Machines :	The products adapt to the machine with all the performance features such as a high feed rate, a long service life and short tool changing times. Together with the parts supply assurance, a high daily production volume, and above-average economy is guaranteed

Place of origin	zhejiang.China
Application	Foundation creation,Solid wall,Water well drilling
Certification	ISO9001:2008
Material	ASTM4142 / 42CrMo/40Cr
Port of loading	ningbo
Packing	Wooden case or Iron case,Carton or Plastice box
Minimum order	500 PCS
Payment terms	TT or L/C
Supply ability	50,000 PCS/Month
Delivery time	4~8 weeks