Integral Drill Rods

and inspection of National Rock Drilling Tools Inspection Center. All the

products have assured by China People Insurance Company.

1) Different sizes available

2) Tapered drill rods:

a) Raw materials: 55 SiMnMo, 95 CrMo

b) Shank size: H22 x 108mm (7/8 x 4 1/4 )

c) Taper: 7, 12

d) Length under collar (mm): 610, 1220, 1830, 2000, 2435, 2740, 3050, 3660

3) Integral drill rods:

a) Raw materials: 55 SiMnMo, 95CrMo

b) Shank sizes: i) H22 x 108mm (7/8 x 4-1/4 ) ii) H25 x 108mm (1 x 4-1/4 )

c) Length under collar (mm): 400, 800, 1200, 1600, 2000, 2400, 3200, 4000, 4800

d) Bit diameter (mm): 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41