Exacto Torque™

A large number of rod failures are the result of inaccurate pre-stressing. ACI's ExactoTorque is the patented solution. It can be used for a wide variety of mounting and industrial attachments (flange bolting, foundation bolting, etc.), especially where precise alignment and space restrictions are a concern.

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The Problem: Achieving proper torque.

• Most piston rods need to be torqued to a pre-stress of 30,000 psi.
• Conventional fasteners require unwieldy and occasionally hazardous application tools.
• Galling between nut face and crosshead face often result from turning these faces against each other at the required torque levels.
• These often lead to Piston Rod Failure, Thread Damage, and/or Excessive Rod Deflection.

The Proven Solution - ExactoTorque

• Computer stress analysis assures proper quantity and size of jackbolts seated on individual bearing pads. Accurate preload is applied and face-to- face galling is eliminated.
• The ExactoTorque pre-stresses the rod in the same manner as a conventional hex nut. Thread root area and bearing pad surface are equal to root and contact surface of conventional nut.
• Mated spherical surfaces on pad and jackbolt allow perfect alignment of nut to crosshead face.
• Designed for the specific application to fit rod load, gas load and space requirements.
• Available for specialized applications such as piston end nuts, or designs to fit Cooper GMV compressors and others with air scavenger pistons.
• Field proven for over 16 years..

Ease of Installation

• Jackscrew pads are secured with seals to stay in place.
• Normal multi-screw alternating sequence achieves a uniform torque.
• Precise control of preloads with standard torque wrenches. Eliminates jacking wrenches, cranes and other inaccurate techniques.

Torque Requirement Comparisons