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Mark-Free Bending of Turned 8mm Hex Rod Elbows | CNC
8mm hexagonal steel rods, threaded and turned before bending, formed into elbow fittings without surface marks. Precision CNC bending for fastener hardware.
Key Specifications
- Materials
- 8 mm hexagonal steel rod, turned ends
Key Features
- Bends pre-threaded hex rod without bruising flats
- V-groove clamps register on the hex faces
- Elbow angle held for assembly alignment
- Threads protected by end-supported dies
Can You Bend a Threaded, Plated Bolt Blank and Keep It Mark-Free?
Short answer: Yes - with hex-registering tooling. This video shows 8mm hexagonal rods, already turned and threaded at the ends, bent into elbow fittings without bruising the flats or damaging the finish.
What the Video Demonstrates
| Step | Operation | Result |
|---|---|---|
| 1 | Turned, threaded blank | Ready-to-bend stock |
| 2 | Blank seated in V-groove | Hex faces supported |
| 3 | Elbow angle swept | Threads untouched |
| 4 | Parts binned | Mark-free elbows |
Key Applications
- Elbow bolts and angled fasteners
- Pipe and rod-end connectors
- Machinery adjustment links
Bending After vs Before Threading
| Sequence | Thread condition | Cost |
|---|---|---|
| Bend, then machine ends | Fine | Two setups |
| Machine ends, then bend | Must protect threads | Needs smart tooling |
| Shown here | Protected by V-groove | One clean flow |
FAQ
Why do the flats stay clean? The die registers on the hex faces themselves, spreading clamp force over full flats instead of points.
Can stainless elbows run the same way? Yes - same tooling principle, program adjusted for stainless springback.
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