Tube Crank Handle Bending Machine | Clean U-Bends
Watch a single-station rotary bending machine form U-shaped crank handles from thick aluminum tube - one quick stroke per bend, clean radius.
Key Specifications
- Materials
- Thick-wall aluminum round tube
Key Features
- Bends thick tube with a clean radius - no flattening
- Wrap-around die protects the tube surface during the stroke
- Both ends formed at one compact station
- Bolted clamp blocks locate the tube for repeat bends
How Are Thick Tube Crank Handles Bent Without Flattening?
Short answer: On a rotary wrap die. This video shows a single-station bending machine forming U-shaped crank handles from thick-wall aluminum tube - the tube wraps around the die pin while bolted clamp blocks support it, so each bend comes out with a clean, round radius instead of a flattened or kinked wall.
What the Video Demonstrates
| Stage | Equipment | Result |
|---|---|---|
| Load | Manual insertion into wrap die | Tube positioned for the bend line |
| Clamp | Bolted clamp blocks | Wall supported during the stroke |
| Form | Rotary single-stroke bend | Clean radius, no flattening |
| Repeat | Re-position for second end | Matching U-handle each cycle |
Key Applications
- Crank and lever handles from thick aluminum tube
- Door, gate and enclosure pull bars
- Furniture and equipment frames needing 90-degree tube bends
- Shops replacing press bending that flattens thin walls
Rotary Wrap Bending vs. Press Bending for Tube
| Criterion | Press bending | Rotary wrap bending |
|---|---|---|
| Tube wall after bend | Risk of flattening | Round, supported by die |
| Bend radius | Sharp, springback | Consistent clean radius |
| Surface finish | Clamp marks common | Wrap die protects tube |
| Setup per part | Frequent adjusting | Bolted stops repeat the position |
FAQ
Which tube sizes can this handle bending machine process? Thick-wall aluminum round tube is shown; die sets are matched to your outer diameter and wall thickness on request.
Does the bend stay round on thin-walled tube? The clamp blocks support the wall through the stroke, which is why the video shows a clean radius without flattening.
Can both ends be bent on one machine? Yes - the operator repositions the tube after the first bend, and the second end is formed on the same station.