Roller-reamer

Details Roller-reamer Roller-reamer

E - Fixed Constructions

21

B

255/28, 255/79

E21B 17/10 (2006.01) E21B 10/22 (2006.01) E21B 10/30 (2006.01)

Patent

CA 1174662

ROLLER-REAMER ABSTRACT OF THE DISCLOSURE A roller-reamer structure wherein for each roller shaft, the shaft is tightly, but releasably secured, both radial and thrust bearings being provided for relatively moving roller and shaft surfaces. The shaft is held in the various embodiments within accommodating slots by an inter- ference fit between the shaft and and the accommodating slot, by a partially slotted longitudinal opening that allows squeezing of a block about the shaft end, by a ta- pered shaft end being wedgedly held or by a slotted block opening and tapered wedging block member for tightly se- curing the shaft. Some combinations include a sealed and protected self-lubricating reservoir.

380273

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