Manufacturer: Xingtai Haihui Machine Tool Co., Ltd. | Xingtai, Hebei, China
Single-line and double-line processing ranges must be checked separately when choosing a 12mm ribbed rebar stirrup bender. The presence of a double-line feature does not mean the maximum single-line diameter is available in both modes. Haihui provides model-specific information for buyers considering equipment made in China.

The HH4-12S product page lists single-line threaded rebar from 4–12mm and double-line threaded rebar from 4–10mm. This means a 12mm enquiry should be reviewed for single-line operation on that published configuration. Ask the supplier to confirm the intended steel grade and current offered specification.
Tell the manufacturer which diameters account for most orders and which are occasional jobs. State batch sizes and shape changes. A workshop working mostly with smaller bars may assess modes differently from a workshop focused on 12mm material. Selection should follow real demand rather than a feature list alone.
Where both modes are required, agree on separate sample tests using suitable material and drawings. Inspect the finished pieces and record accepted output. Include the time needed to change settings or stock. A trial in one mode should not be used as proof of performance in another.
The technical proposal should identify material compatibility, diameter ranges, payoff equipment and tooling for the intended modes. Confirm any application limitations before ordering. Keep that record available for commissioning and operator handover, so the team understands how the supplied configuration is intended to be used.
No. Confirm the exact model and operating range; the published HH4-12S double-line threaded range is 4–10mm.
Review the HH4-12S CNC rebar stirrup bending machine and learn about Haihui. Send your steel grade, 12mm material details, drawings and destination for a model-specific discussion.
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Haihui Machinery is a professional manufacturer of CNC rebar bending machines and steel bar processing equipment, serving construction and steel fabrication customers worldwide. Add:Add: Dengqiao Haihui Machine Tool, Tiankou Town, Renze District, Xingtai, Hebei, China. Xingtai Haihui Machine Tool Co., Ltd