Products

Problem

Settlement

Diamond core bit

1: size or technical parameters (matrix etc.) are different from the requirement of customers’ order

Replace

2: thread can not fit customers’ barrel

Repair or replace

3: break down a piece from matrix, and the volume of the piece exceed 2mm*2mm*2mm, and such break is not caused by drilling

Replace

4: matrix falling not caused by drilling

Replace or return

5: groove on matrix caused by manufacturer

Replace or return

6: drilling speed is obvious slower than congener products cause by manufacturer

Replace, and each item quantity does not exceed 3 pieces

7: bit life is obvious short cause by manufacturer

8: breaking down of matrix, falling matrix, groove and short bit life caused by operating reasons- drill rod sticking, premature failure of the bit crown and hole bottom not to be cleaned

Be excluded from quality guarantee

9: short bit life or no penetration caused by drilling machine, drilling techniques or parameters

10: properly worn and the matrix is finished

11: thread damaged or distorted due to improper operation

12: Steel body cracked in drill

Reaming shell

1: thread is not correct

Repair or return

2: steel body cracked in drill

Repair or return

3: PCD strips falling

Repair or return