Choose a bucking unit by matching a specific machine configuration to your workpiece and connection requirements. Start with the information below, then compare the Shenlida product range and ask our team to confirm the selected configuration.

1. Describe the workpiece

Provide outside diameter, length, weight and connection type. Identify the component being assembled or serviced, such as casing, pipe, a pump or a downhole tool. Include drawings or photographs when the shape or available clamping area needs explanation.

2. State make-up and break-out requirements separately

Provide the torque requirements for your connection and the desired operating speed. Use the relevant model's published ratings. For example, the SLD8026 page lists maximum make-up torque of 150,000 ft·lbs and maximum break-out torque of 190,000 ft·lbs. Those values are not specifications for every bucking unit.

3. Match the model to the workshop duty

For continuous 360° assembly and disassembly, compare the 23 SLD reference configurations. SLD14-150 and SLD14-180 both list a 60–355.6 mm clamping range, but their maximum torques are 150 and 180 kN·m respectively. The same pipe diameter does not mean the same torque capacity. These are custom-built units: clamping diameter, maximum torque and equipment configuration can be customized.

For threaded downhole tools, pumps and tubulars, compare the YNJ hydraulic bucking units: rated torque is 15,000 N·m in low gear and 2,600 N·m in high gear; automatic torque control is optional. For workover pipe and rod connections, review the bottom-opening configuration and confirm its required capacity. Match the complete model specification to the job; do not combine ratings from different models or operating gears.

4. Confirm clamping and control options

Explain surface-marking constraints, short clamping distances and unusual workpiece shapes. Confirm the proposed clamping arrangement and whether automatic torque control and records are included or optional. The YNJ description lists automatic torque control as optional; the continuous 360° model describes an equipped automatic system.

5. Review the installation and supplied equipment

Share available workspace, workpiece support needs and site power information. Ask the quotation to identify the hydraulic system, console, supports, rails and optional equipment. A configuration list should be checked against your application, not inferred from a photograph.

Prepare a useful quotation request

  • Product or model of interest and intended application
  • Workpiece diameter, length, weight and connection details
  • Required make-up torque, break-out torque and working speed
  • Clamping and torque-recording requirements
  • Quantity, installation location and requested delivery timing

Send your requirements to Shenlida. You can also review our manufacturing information, certifications and patents, and configuration comparison.

Check the manufacturer behind the equipment

Shenlida (SLD) is the equipment brand of JIANGSU SHENLIDA MACHINERY MANUFACTURE CO., LTD., based in Jiangsu, China. Review our factory information and the organizer-hosted WPC Energy 2026 exhibitor profile to check the company identity. The directory entry identifies the exhibitor; it does not certify an individual machine or its performance.