Rafter delivers three newly designed RT-2500S HFI Weld Boxes
PUBLISHED: 30 Jan 15
RT-2500S HFI Weld Squeeze Box
Rafter Equipment Corporation has delivered three (3) RT-2500S HFI weld squeeze boxes for a major North American mechanical tubing producer.
The new boxes will replace the customer's existing 3-roll "scroll chuck" style boxes that were not strong enough for the heavier wall thicknesses and higher yield strength materials that needed to be produced. Because the boxes needed to be more robust but still occupy the same footprint, a new design was required.
The new design follows the company's push-on-center weld box philosophy that eliminates the cantilever forces on the roll tooling clevises (or yokes) that plague many other weld box designs. Heavy-duty Timken tapered roller bearings within the roll tools provide increased bearing life. The boxes can handle up to 3.000" OD x 0.188" wall (76.2 mm x 4.8 mm) tube running HSLA material.
To better survive the typical tube mill environment, the worm-screw head roll adjusters are in a new sealed box design that should provide years of maintenance-free operation. The head roll adjustments are run through the back of the unit's sealed frame and are brought to the operator's side for easy access. A gasketed, internal guide tube is designed to keep mill coolant from flooding the interior of the box.
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