Ditch Witch JT100AT - Manual (Page 94)

JT100/JT100 All Terrain Operator’s Manual
Prepare - 93
Plan Bore Path
CMW
©
Bore Path Calculator - All Terrain Pipe
Entry pitch, setback, and minimum depth work together with bend limits to determine the bore path. To find
the setback (B) and entry pitch (A) that will take you to the desired minimum depth (D), use the chart
below.
Minimum depth (D) Entry pitch (A) Setback (B) Depth to begin steering (S)
6 ft 7 in (2.01 m) 11.3° / -20% 53 ft 4 in (16.26 m) 2 ft 7 in (0.79 m)
7 ft 8 in (2.34 m) 12.4° / -22% 57 ft 1 in (17.40 m) 2 ft 10 in (0.86 m)
8 ft 9 in (2.67 m) 13.5° / -24% 60 ft 10 in (18.54 m) 3 ft 1 in (0.94 m)
10 ft 0 in (3.05 m) 14.6° / -26% 64 ft 6 in (19.66 m) 3 ft 4 in (1.02 m)
11 ft 2 in (3.40 m) 15.6° / -28% 68 ft 2 in (20.78 m) 3 ft 7 in (1.09 m)
12 ft 6 in (3.81 m) 16.7° / -30% 71 ft 9 in (21.87 m) 3 ft 10 in (1.17 m)
13 ft 10 in (4.22 m) 17.7° / -32% 75 ft 3 in (22.94 m) 4 ft 1 in (1.24 m)
IMPORTANT: Numbers in table based on 205’ (62.5 m) minimum bend radius, Rockmaster™
housing, 6.25-in bit, and half of first drill pipe (L, totaling 13.5’ [4.1 m]) in the ground before steering.