Ditch Witch JT60AT - Manual (Page 68)

Prepare - 68
JT60/JT60 All Terrain Operator’s Manual
Plan Bore Path
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. For JT60 or JT60 All
Terrain drill pipe, make sure pitch (A) changes no
more than 7% over the full length of each pipe.
Monitor the pitch of each pipe with the remote display on the operator’s console. (See tracking system
operation instructions.)
Bend Radius
JT60 All Terrain drill pipes have a tested minimum
bend radius of 205’ (63 m). This means that a 90-
degree bend in the bore path:
• has a radius (A) of 205’ (63 m)
• requires approximately 471’ (143.6 m) of drill
pipe (B).
NOTICE: Only use approved JT60 Power Pipe HD, All Terrain Power Pipe, or Power Pipe Forged with
this drilling unit.
IMPORTANT: Consider recommended bend limits during any bend, not just during bore entry.
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.
NOTICE: Bending drill pipe more sharply than
recommended will damage the pipe and cause
failure over time.
• If bend radius is reduced, drill pipe life is
reduced.
• If bend radius is increased, drill pipe life
is increased.