McKissick 171 Tong Block - 3/4 in - 0.5 Ton - 6 in - Roller Bearing - Steel

Description du produit

The McKissick 171 Tong Block is a specialized single-sheave block designed for tong line applications in oilfield drilling and workover operations, where reliable rope guidance and smooth sheave rotation are essential for efficient tong operation at the drill floor. Rated for a 1/2-ton working load limit, this block is built around a 6-inch outside diameter steel sheave supported by a roller bearing, providing low-friction rope travel and consistent performance during the repetitive cycling demands of tong line service. The 171 series accommodates wire rope cable up to 3/4 inch in diameter.

The tong block is a purpose-built component used in rotary drilling operations to guide and support the tong line, which is the wire rope or cable used to apply torque to drill pipe connections through the use of rotary tongs. Reliable sheave rotation and rope guidance are critical in this application, as the tong line is subjected to repeated loading and directional changes during the make-up and break-out of drill pipe connections. The roller bearing sheave minimizes friction and wear during these high-cycle operations, contributing to consistent tong line performance and reduced maintenance requirements on the drill floor.

The steel sheave construction provides the durability required for oilfield drilling environments, where blocks are exposed to heavy use, impact, and harsh conditions on a continuous basis. The McKissick 171 is a well-established tong block in the oilfield market, recognized for its straightforward, dependable design in a demanding and specialized application. This block is intended for use in rotary drilling, workover, and well servicing operations where a dedicated tong line block is required.

Material:

Steel (body and cheek plates) Steel sheave Roller bearing

Compatible With:

Wire rope cable up to 3/4 in diameter Rotary tong line systems

Uses:

Tong line guidance in rotary drilling operations Make-up and break-out of drill pipe connections Workover and well servicing tong line applications Oilfield drill floor rope guidance

Key Features:

1/2 Ton working load limit 6 in sheave outside diameter Steel sheave for durability in oilfield environments Roller bearing for low-friction, high-cycle tong line operation Accommodates wire rope cable up to 3/4 in diameter Purpose-built for rotary tong line applications McKissick 171 series