Tong assembly

A tong assembly comprising:

• a case assembly including an enclosure defining an interior;
• a bearing assembly disposed in the interior of the enclosure, the bearing assembly including a first bearing member defining a first cavity and a second cavity and a second bearing member defining a first cavity and a second cavity;
• and
• a tong head assembly disposed in the interior of the case assembly, the tong head assembly including an outer ring gear, the outer ring gear including a first axial end portion, an oppositely disposed second axial end portion and a central portion, the central portion including a plurality of gear teeth, the first axial end portion being disposed in the first cavity of the first bearing member and a first portion of the central portion is disposed in the second cavity of the first bearing member, the second axial end portion being disposed in the first cavity of the second bearing member and a second portion of the central portion being disposed in the second cavity of the second bearing member.

An outer ring gear assembly for a tong assembly comprising:

• an outer ring gear including a first axial end portion, an oppositely disposed second axial end portion and a central portion disposed between the first and second axial end portions, the central portion having an outer diameter that is greater than an outer diameter of the first axial end portion and an outer diameter of the second axial end portion, the central portion including a plurality of external teeth;
• a bearing assembly including:
• a first bearing member having a first axial end and an oppositely disposed second axial end and defining a thru-bore that extends through the first and second axial ends, the first bearing member defining a first cavity disposed adjacent to the first axial end and a second cavity disposed adjacent to the second axial end, an inner diameter of the second cavity being greater than an inner diameter of the first cavity;
• a second bearing member having a first axial end and an oppositely disposed second axial end and defining a thru-bore that extends through the first and second axial ends, the second bearing member defining a first cavity disposed adjacent to the first axial end and a second cavity disposed adjacent to the second axial end, an inner diameter of the second cavity being greater than an inner diameter of the first cavity;
• wherein the first axial end portion of the outer ring gear is disposed in the first cavity of the first bearing member and a first portion of the central portion of the outer ring gear is disposed in the second cavity of the first bearing member, the second axial end portion of the outer ring gear being disposed in the first cavity of the second bearing member and a second portion of the central portion of the outer ring gear being disposed in the second cavity of the second bearing member.