LOW FRICTION POWER TONG JAW ASSEMBLY

摘要

The present invention provides an improved power tong jaw (20) having a jaw body (21) with a roller aperture (23) formed therein. A jaw roller (22) is positioned in the roller aperture (23) by some type of retaining surface (35), such as a roller pin (36). Additionally, a friction reducing surface (31) is formed between the jaw roller (22) and the jaw pin (36). In one embodiment, this friction reducing surface (31) comprises a plurality of needle bearings (26). In alternate embodiments, the friction reducing surface (31) comprises ball bearings (40), journal bearings (46, 47), or recirculating ball bearings (49).