Strongsville, Ohio, USA, January 27, 2015 – Rafter Equipment Corporation has delivered three (3) RT-2500S HFI weld squeeze boxes for a major North American mechanical tubing producer on their Kusakabe tube mill. 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.
Rafter Equipment Corporation is a manufacturer of tube mills, pipe mills, roll forming machines, cutoff machines, and other related tube and pipe mill machinery. Additional services include PROACTIVE maintenance, mill refurbishing, design engineering, and contract manufacturing. Originally started in 1917, the Rafter name is known for reliable, high-quality tube mill and roll forming equipment.
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