Ditch Witch JT30AT - Manual (Page 76)

JT30 /JT30 All Terrain Operator’s Manual
Prepare - 76
Plan Bore Path
CMW
Recommended Bend Limits
Ditch Witch drill pipes are designed to bend slightly during operation. Slight bending allows for steering and
correcting direction. Bending beyond recommended limits will cause damage that might not be visible. This
damage adds up and will later lead to sudden drill pipe failure.
Pipe Pitch
Ditch Witch drill pipe is tested to bend at a maximum
percent pitch.
Make sure pitch (A) changes no more than the
following percentages over the full length of each pipe.
Monitor the pitch of each pipe with the tracker remote display on the operator’s console.
IMPORTANT: Consider recommended bend limits during any bend, not just during bore entry.
JT pipe AT pipe AT cobble pipe
6.5% 6.4% 4.4%
NOTICE: Bending drill pipe more sharply than recommended will damage pipe and cause failure over
time. Changes in pitch must be equally distributed over the length of a pipe. Maximum changes in
pitch within 1-2’ (300-600 mm) of pipe create sharp bends that will damage pipe.