RACK 4L
RACK 4L-Low Profile with Interchangeable Heads to 4,200 ft-lbs
The kit is packaged with common wrench sizes in a compact, convenient case for field use. The range of
heads, adapters and wrench inserts eliminate the need for multiple tools.
Unique, Rack & Pinion Design for Industry's Highest Accuracy
Power-Dyne's proprietary rack & pinion design is actually a highly accurate gear mechanism: As the rack
moves the pinion, the geometry at the point of engagement adjusts to provide a directly proportional
variation in applied force, which compensates for the changes in center distance. Therefore, torque
output is constant. You get accuracy to ±2½ % of reading, traceable to the NIST (NBS).
Conventional ball & socket wrench designs employ a piston rod, which engages a lever arm. As the rod
extends through the power stroke, both the center distance of the arm and the applied force change.
However, the changes are not proportional, and create fluctuations in torque output.
Other sizes available
At 4,000 ft-lbs, the RACK 4L wrench delivers up to 30% more torque than other wrenches in its class.
The RACK 4L features light weight for portability and a low profile for use in limited clearance areas. Its
interchangeable heads accommodate a range of hex drives on the same wrench. The heads can be
changed in seconds, without tooling. A Digital Torque Readout (DTR) with membrane keypad on the
pump enables easy changeovers from short to reversible and can be changed with other styles and
sized. A drop-foot adapter is adjustable within a 360º range and swivel hydraulic fittings permit
maneuverability without hose binding.
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2055 South Main Street
Middletown, CT 06457-6151
Phone: 860.346.9283 - Fax: 860.343.6642
E-mail:
power-dyne@bidwellinc.com
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