Backreamers, Jt922 operator’s manual – Ditch Witch JT922 User Manual
Page 112
JT922 Operator’s Manual
Systems and Equipment - 111
Downhole Tools
CMW
Backreamers
A backreamer enlarges the hole as pipe is pulled back through the bore. No one backreamer works well in
all conditions. These charts are meant as a guideline only. See your local Ditch Witch dealer for soil
conditions and backreamer recommendations for your area.
•
1 = best
•
2 = good
•
3 = fair
•
4 = not recommended
Backreamer
Sandy
Soil
Soft Soil
Medium
Soil
Hard
Soil
Rocky
Soil
Soft
Rock
Hard
Rock
Beavertail
3
1
1
1
3
4
4
Three Wing
4
3
3
2
1
1
4
Water Wing
4
3
2
1
2
2
4
Compact Fluted
1
1
2
2
2
3
4
Kodiak
4
3
3
2
1
2
4
Rhino Rock
4
4
4
4
3
2
1
Rockmaster
4
4
4
4
3
1
1
Compaction
Cone
1
2
3
4
4
4
4
HC Hard
Condition
4
3
2
1
1
4
4
ST Saw Tooth
2
2
1
2
2
3
4
MX Mixer
2
2
3
4
4
4
4
CT Cutter
3
2
1
2
3
4
4
EX Expander
1
2
3
4
4
4
4
Fluted Cone
1
1
2
2
2
3
4
IMPORTANT: For soil definitions, see the chart on the previous page.