Using five dedicated helicoid winders, we cold-form continuous flights from strip bar for small- and mid-diameter screws. Continuous helicoid flights can be shipped as mill-length spirals or cut to specific lengths, giving OEMs a seamless, economical option for repeat production runs.
Highlights
- Continuous one-piece flights to 40 ft length—no sectional joints, superior balance
- Diameter capability 2 in → 36 in; strip thickness 1⁄8 in → 1⁄2 in (heavier sizes by review)
- Five winders allow parallel production and quick-turn emergency runs
- ±0.75 mm pitch accuracy and ≤1 mm ⁄ m straightness after weld
- Lower cost and weight than sectional flights; ideal for repeat OEM orders
| Criteria | Spec | Notes |
|---|---|---|
| Outside Diameter Range | Min: 0.25 in, Max: per application | Helicoid method is most economical when practical. |
| Strip Thickness Range | Min: 0.06 in, Max: 1.25 in | 16 gauge minimum; up to 1.25 in maximum depending on alloy and coiler setup. |
| Maximum Flight Length | Per request | Dependent on winder setup, handling, and shipping constraints; spooled or sectioned supply available. |
| Pitch Styles Supported | Standard Pitch (≈ Ø), Short Pitch (≤ 0.5 × Ø), Long Pitch (≥ 1.5 × Ø), Variable Pitch Helicoid | Multi-start (dual-flight) helicoid produced by coiling two strips in opposite 180° phases. |
| Pitch Tolerance | 0.0625 in | |
| Run-Out After Shaft Weld | 0.01 in TIR | As required. |
| Common Materials | A36 / mild carbon steel strip, 304 / 316 stainless steel strip, Aluminum 6061-T6 strip, 4140 / 8620 alloy strip (normalized) | Hard-facing or wear-edge bead optional for abrasive duty. |
| Surface Finish (as-coiled) | Mill finish | Polish available upon request. |
| Typical Lead Time | 1-4 weeks | Prototype or emergency flights in 1 week; standard production 2–4 weeks depending on alloy and load. |
| Production Scale | Per request | Based on OEM program volume and coiler availability. |