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Systems and Equipment - 112<br />
Backreamers<br />
JT5 Operator’s <strong>Manual</strong><br />
Downhole Tools<br />
A backreamer enlarges the hole as pipe is pulled back through the bore. No one backreamer works well in<br />
all conditions. These charts are meant as a guideline only. See your local <strong>Ditch</strong> <strong>Witch</strong> dealer for soil<br />
conditions and backreamer recommendations for your area.<br />
• 1 = best<br />
• 2 = good<br />
• 3 = fair<br />
• 4 = not recommended<br />
Backreamer<br />
Sandy<br />
Soil<br />
Soft Soil<br />
Medium<br />
Soil<br />
Hard<br />
Soil<br />
Rocky<br />
Soil<br />
Soft<br />
Rock<br />
Hard<br />
Rock<br />
Beavertail 3 1 1 1 3 4 4<br />
Three Wing 4 3 3 2 1 1 4<br />
Water Wing 4 3 2 1 2 2 4<br />
Compact Fluted 1 1 2 2 2 3 4<br />
Kodiak 4 3 3 2 1 2 4<br />
Rhino Rock 4 4 4 4 3 2 1<br />
Rockmaster 4 4 4 4 3 1 1<br />
Compaction<br />
Cone<br />
HC Hard<br />
Condition<br />
1 2 3 4 4 4 4<br />
4 3 2 1 1 4 4<br />
ST Saw Tooth 2 2 1 2 2 3 4<br />
MX Mixer 2 2 3 4 4 4 4<br />
CT Cutter 3 2 1 2 3 4 4<br />
EX Expander 1 2 3 4 4 4 4<br />
Fluted Cone 1 1 2 2 2 3 4<br />
IMPORTANT: For soil definitions, see the chart on the previous page.<br />
CMW
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