DTH and OTH Shock Absorbers

Shock subs are installed in the drill string to absorb and dampen the impact load on the drill head. Shock subs have the greatest benefit in hard rock and broken formations.

Shock Absorbers Complete - Down the Hole

Size Description
3" DTH 2 3/8" Reg Pin Top - 2 3/8" Reg Box Bottom
4" DTH 2 3/8" Reg Pin Top - 2 3/8" Reg Box Bottom
5" DTH 3 1/2" Reg Pin Top - 3 1/2" Reg Box Bottom
6" DTH 3 1/2" Reg Pin Top - 3 1/2" Reg Box Bottom
8" DTH 4 1/2" Reg Pin Top - 4 1/2" Reg Box Bottom
10" DTH 6 5/8" Reg Pin Top - 6 5/8" Reg Box Bottom
10" DTH 8 5/8" Reg Pin Top - 8 5/8" Reg Box Bottom
12" DTH 6 5/8" Reg Pin Top - 6 5/8" Reg Box Bottom
12" DTH 8 5/8" Reg Pin Top - 8 5/8" Reg Box Bottom
14" and 18" DTH Special Order

Shock Absorbers Complete - Out the Hole

Size Description
4" OTH Holman Flange Top - Holman Pin Bottom
4" OTH Holman Flange Top - 2 3/8" Reg Box Bottom
4" OTH 2 3/8" Reg Pin Top - 2 3/8" Reg Box Bottom
5" OTH Copco DDR42 Flange Top - 2 3/8" Reg Box Bottom
5" OTH Holman Flange Top - 2 3/8" Reg Box Bottom
5" OTH 2 3/8" Reg Pin Top - 2 3/8" Reg Box Bottom
6" OTH 3 1/2" Reg Pin Top - 3 1/2" Reg Box Bottom
8" OTH 4 1/2" Reg Pin Top - 4 1/2" Reg Box Bottom
Shock Absorber

Specifications

Size Weight Overall Length Effective Length Outside Diameter Standard Thread Connection
3" DTH 25.35 lbs. 17 1/4" 14 1/4" 3" 2 3/8" Regular
4" DTH 35.83 lbs. 18 3/4" 15 3/4" 3.68" 2 3/8" Regular
5" DTH 60.63 lbs. 21 3/8" 17 5/8" 4 1/2" 3 1/2" Regular
6" DTH 91.49 lbs. 23 1/4" 19 1/2" 5 1/4" 3 1/2" Regular
8" DTH 187.39 lbs. 27" 22 3/4" 7" 4 1/2" Regular
10" DTH 332.90 lbs. 30 1/8" 25 1/8" 8.86" 6 5/8" Regular
12" DTH 443.13 lbs. 29 1/2" 24 1/2" 10.15" 6 5/8" Regular

Shock Absorber diagram
Item No. Description
1 Top Connector
2 Shaft
3 Shaft/O-Ring
4 Buffer
5 Nut O-Ring
6 Nut
7 Bottom Connector