I'll be at the farm Bushhogging next week with the M4900 so I took a couple of days this week and visited my Son and two Grandsons at a fiber optic placing job.
They are boring 120 feet from existing service to a designated spot underneath the building in. the background. The initial bore will be with a 4" bit.
And will end in this receiving pit underneath the building.
The 4" bit was removed and replaced with this 8" back reamer bit to enlarge the bore.
The 8" back reamer bit was then replaced by this 12" back reamer bit enlarging the bore to it's final size.
Two 4" conduits were then prepped and connected to the 12" back reamer. The "VacTron" which sucked up the water and muc is also shown here.
The two 4" conduits were then pulled through the bore as the boring machine retracted the boring stems.
Through the crawl hole and into the bore hole.
The 12" back reamer arrived bringing it's two 4" conduits.
The two 4" conduits were then pulled into their destination "hand hole".
And trimmed to the proper length. Note that each 4" conduit contained three innerducts through which the fiber optic cable will be pulled.