Finished 90-degree U-frame bent from square tube held beside stacked parts
tube-bending

Square Tube Bending Machine | 90-Degree U-Frames

See a hydraulic rotary die bend square steel tube into 90-degree U-frames, with a digital caliper checking each part for clean corners and repeatable geometry.

Key Specifications

Materials
Square steel tube

Key Features

  • Bends square tube into clean 90-degree U-frames
  • Hydraulic rotary die forms both corners in one setup
  • Digital caliper verifies leg length and angle
  • Square section stays true - no flattening
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How Is Square Tube Bent to 90 Degrees Without Flattening?

Short answer: On a hydraulic rotary wrap-around die. This video shows a bending machine forming 90-degree U-frames from square steel tube, keeping the square section true and verifying each part with a digital caliper.

What the Video Demonstrates

StageEquipmentResult
FeedManual tube insertionCorrect bend position
FormHydraulic rotary wrap-around dieClean 90-degree corner
CheckDigital caliperVerified leg length
RepeatFrames stackedIdentical parts per batch

Key Applications

  • Square-tube U-handles and frames
  • Door, gate and enclosure frames
  • Hardware shops replacing slow hand bending
  • Runs needing clean 90-degree square-tube bends

Rotary Bending vs. Press Bending for Square Tube

CriterionPress bendingRotary wrap-around bending
Square sectionRisks flatteningStays true
Corner radiusSharp, can creaseClean, even
Surface marksCommonMinimal
ConsistencyVariesCaliper-verified repeats

FAQ

What stock does this machine bend? Square steel tube; the die can be matched to other sizes and materials on request.

Does the square tube flatten when bent? No - the wrap-around rotary die supports the section so it bends without flattening.

How is accuracy held? The fixed die sets the 90-degree corner, and a digital caliper verifies each frame.

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