McKissick 171 Tong Block - 3/4 in - 2.5 Ton - 12 in - Roller Bearing - Steel

Product Description

The McKissick 171 Tong Block is a specialized rigging block engineered for tong line applications in oilfield drilling and well service operations requiring a 2.5 Ton working load capacity. Designed to accommodate wire rope up to 3/4 inch in diameter, this block features a 12-inch outside diameter steel sheave that provides a larger rope bend radius compared to the 10-inch sheave variant, contributing to reduced wire rope fatigue and extended rope service life during the repetitive cycling inherent in active tong line service. Tong blocks are purpose-built components used to support and guide the tong lines that operate the pipe tongs used for making up and breaking out drill pipe, casing, and tubing connections on the drill floor and during well service operations.

The 171 is fitted with roller bearings that provide reliable performance under the radial loads generated during tong line operation, supporting smooth sheave rotation and reducing friction losses in the tong line system. Roller bearings offer improved load capacity and rotational efficiency compared to plain bushing designs, contributing to consistent tong line performance during the repetitive cycling associated with active drilling and pipe handling operations. The steel sheave construction delivers the wear resistance and structural durability required for sustained service in the demanding environment of a drilling rig floor or well service operation, and the larger 12-inch sheave diameter provides improved rope protection compared to smaller tong block configurations.

The McKissick 171 Tong Block in the 12-inch sheave configuration is designed for use in oilfield drilling rigs, workover rigs, and well service operations where reliable tong line guidance and support are essential to efficient pipe handling. The larger sheave diameter makes this variant a preferred choice when wire rope service life and reduced rope fatigue are priorities in high-cycle tong line applications. Always verify working load limits, wire rope diameter compatibility, and mounting configuration prior to installation and use in tong line service.

Material:

Steel Sheave Roller Bearings

Compatible With:

Wire Rope up to 3/4 in Diameter

Uses:

Oilfield Drilling Rig Tong Line Applications Workover and Well Service Rig Pipe Handling Drill Pipe, Casing, and Tubing Make-Up and Break-Out Operations Tong Line Guidance and Support in Drilling Operations High-Cycle Tong Line Applications Requiring Extended Rope Service Life

Key Features:

2.5 Ton Capacity 3/4 in Maximum Wire Rope Diameter 12 in Sheave Outside Diameter for Reduced Rope Fatigue vs. 10 in Sheave Variant Steel Sheave for Durability and Wear Resistance Roller Bearings for Smooth Tong Line Operation and Reduced Friction Purpose-Built Tong Block Design for Oilfield Pipe Handling McKissick 171 Series Suitable for Drilling Rig Floor and Well Service Tong Line Applications