Z-Handle Bending Machine | Knurled Grip Crank Rods
A hydraulic rotary bender forms double 90-degree Z crank handles from knurled stainless rod - bend offsets verified with a digital caliper at the station.
Key Specifications
- Materials
- Stainless round rod with knurled grip sleeve
Key Features
- Forms two opposite 90-degree bends for Z crank handles
- Knurled grip section stays clean through the clamp cycle
- Red clamp blocks index each rod for matching offsets
- Digital caliper checks bend offset length on camera
How Are Double-Bend Z Crank Handles Bent to Size Every Time?
Short answer: Two opposite 90-degree wrap strokes at one station, then a caliper check. This video shows a hydraulic rotary bending machine forming Z crank handles from stainless rod fitted with knurled grip sleeves - the clamp blocks index the rod for each bend, and the finished offset is verified with a digital caliper right at the machine.
What the Video Demonstrates
| Stage | Equipment | Result |
|---|---|---|
| Feed | Manual insertion into red clamp blocks | Rod indexed at first bend line |
| Form | Rotary 90-degree wrap strokes | Clean opposite bends, Z profile |
| Check | Digital caliper on the bend offset | Dimension confirmed at the station |
| Batch | Handles bundled in hand | Matching offsets part after part |
Key Applications
- Crank and lever handles with knurled grip sections
- Tool handles, machine levers and winch cranks
- Double-bend Z parts in stainless rod
- Small batches needing verified bend offsets
Two-Stroke Rotary Bending vs. Jig Welding or Casting
| Criterion | Assembled or cast handles | Two-stroke rotary bending |
|---|---|---|
| Parts per handle | Several + assembly | One rod, two bends |
| Offset control | Tooling dependent | Caliper-verified at station |
| Grip finish | Added separately | Knurled sleeve survives bending |
| Batch flexibility | New mold per design | Re-index clamp blocks |
FAQ
What do the finished parts look like? Z-shaped crank handles: stainless rod with a knurled grip center and opposite 90-degree bends at each end.
How is the bend offset held to size? The clamp blocks index the rod for each stroke, and the operator verifies the offset with a digital caliper at the machine, as shown.
Can the machine bend with the knurled sleeve already fitted? Yes - the wrap forming and block contact keep the grip section clean, and the video shows finished handles with intact knurling.