Réponse rapide: When enquiring about a spiral reinforcement forming machine, specify whether the spiral pitch stays constant or changes along the part. A finished helix needs more information than bar diameter and overall length.
Product application guide from Xingtai Haihui Machine Tool Co., Ltd., Xingtai, Hebei, Chine.
Define the helix on a drawing
Show the required spiral diameter, pas, total length, material size and end details. State whether the diameter refers to the inside, outside or bar centreline. For changing pitch, identify each zone and the transition positions. These definitions prevent different interpretations of the same drawing.
Explain why pitch changes matter
A continuous helix with closely spaced end zones differs from a constant-pitch spiral. Ask the supplier to confirm the available control method and how transitions are set. Do not assume variable-pitch capability from a general machine title or video. Require confirmation for your actual drawing.
Inspect more than the first turns
Measure samples at the start, milieu, transition zones and end. Agree how the spiral will be supported during measurement, since handling can alter its apparent geometry. Record material grade and setup conditions. Include unloading and transport to cage assembly in the demonstration.
Choose from the product family
Haihui lists spiral reinforcement forming equipment in its product range. Use those pages to identify a starting point, then request a drawing-based review. The final proposal should state tooling, material limits, pitch control, installation scope and the agreed acceptance method.
Question fréquemment posée
Can a machine title confirm variable-pitch production?
Non. Ask the manufacturer to verify the required pitch zones and transitions for your drawing.
Related Haihui product
Haihui spiral reinforcement forming machine. Review the product page and request confirmation for your material and drawing.
Request a configuration and quotation
Send a spiral drawing showing diameter, pitch zones, material grade and required quantity. Include your destination country and preferred delivery port.
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