Norris pony rods are manufactured to the same chemical
properties, rod diameters, dimensions, and tolerances
as sucker rods. Standard lengths: 2' (.61 m), 4' (1.22
m), 6' (1.83 m), and 8' (2.44 m). Other lengths are
available on special order.
Definitions
Loads
Light = 0 psi to 25,000 psi (0
Mpa to 172 Mpa)
Medium = 25,000 psi to 35,000 psi
(172 Mpa to 241 Mpa)
Heavy = 35,000 psi to 42,000 psi
(241 Mpa to 290 Mpa)
Extra Heavy = 42,000 psi and greater
(290 Mpa)
Seating Depth and/or Sucker Rod String Lengths
Shallow = 0 feet to 4,000 ft. (1219
m)
Medium = 4,000 feet to 7,000 feet
(1219 m to 2134 m)
