McKissick 171 Tong Block - 3/4 in - 1 Ton - 8 in - Roller Bearing - Steel

Description du produit

The McKissick 171 Tong Block is a single-sheave block designed for tong line applications in oilfield drilling and workover operations, where reliable wire rope guidance and smooth sheave rotation are essential for efficient tong operation at the rig floor. Rated for a 1-ton working load limit, this block is built around an 8-inch outside diameter steel sheave supported by a roller bearing, providing smooth, low-friction rope travel during the repeated 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 to guide and support the tong line — the wire rope used to spin and torque drill pipe connections at the rig floor using rotary tongs. The block is typically mounted at an elevated position on the derrick or mast structure to provide the correct lead angle for the tong line during makeup and breakout of drill pipe, casing, and tubing connections. The roller bearing sheave delivers smooth, low-friction rope travel with minimal maintenance, supporting the high-cycle demands of tong line service during continuous drilling and tripping operations. The steel sheave construction provides the strength and wear resistance required for sustained contact with wire rope in the demanding oilfield rig floor environment.

The 8-inch sheave diameter provides a suitable rope bend radius for the wire rope diameter range accommodated by this block, supporting rope longevity during the repeated bending cycles inherent to tong line service. The McKissick 171 is a purpose-built oilfield block trusted for dependable performance in drilling and workover applications where tong line guidance reliability directly affects rig floor efficiency and connection integrity.

Material:

Steel (body and side plates) Steel sheave Roller bearing

Compatible With:

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

Uses:

Tong line guidance and support on oilfield drilling and workover rigs Makeup and breakout of drill pipe, casing, and tubing connections Rig floor wire rope deflection for rotary tong operations Derrick and mast-mounted tong line block applications

Key Features:

1 Ton working load limit 8 in sheave outside diameter Steel sheave for strength and wear resistance in oilfield environments Roller bearing for smooth, low-friction, high-cycle tong line operation Accommodates wire rope cable up to 3/4 in diameter Purpose-built for rotary tong line applications on drilling and workover rigs McKissick 171 series