Automatic Nut Bolt Thread Making Machine with Feeder

The Z28-185 is a rebar thread rolling machine for producing external threads (common threads, trapezoidal threads and modulus threads). It can perform rolling, forming, slide-brading, knurling and related processes on carbon steel, alloy steel and non-ferrous metals.

It is suitable for materials with elongation greater than 10% and within the machine's compressive strength capability (specified in the product data as compressive strength < 100 KGF/mm²). Typical materials include carbon steel, alloy steel and non-ferrous metals.

Rolling diameter range: 6–65 mm. Ordinary pitch range: 1–8 mm. Maximum trapezoidal pitch: 8 mm. Max width of rolling die: 150 mm. Max outer diameter of rolling die: 220 mm. Center distance of die-spindle: 160–280 mm.

Rolling motor: 11 kW. Hydraulic power: 2.2 kW. Cooling motor: 0.12 kW. Max rolling force: 200 kN. Spindle diameter: 75 mm. Spindle tilt angle: ±15°. Spindle speed options: 20/25/31/41/51/64 r/min. Voltage: 208 V, 60 Hz, 3-phase.

The automatic feeder supplies material continuously to the rolling station for higher consistency and reduced labor. The machine's hollow distribution gear design imposes no theoretical limit on screw length, so very long workpieces can be processed (practical limits depend on support and handling).

The machine is supplied with ISO9001:2008 and CE certifications. Standard warranty is one year, with lifelong technical guidance and support available.

Host machine dimensions: 1790 × 1620 × 1425 mm. Weight: approximately 2200 kg.

The machine uses hardened alloy rolling wheels and precision-ground sliding parts to improve machining precision. A time relay and automatic feeder improve repeatability and thread consistency. Final accuracy depends on die condition, material and setup.

Yes. Rolling dies are made of hard alloy and can be changed to different grades or profiles on request to match specific thread profiles, materials or production needs.

Regular maintenance includes lubrication of sliding parts, checking hydraulic fluid and filters, inspecting and replacing worn rolling dies, and routine electrical checks. Recommended spare parts: rolling dies, hydraulic seals/filters, bearings and belts. Follow the supplier's maintenance schedule.

Requirements include a stable, level foundation with adequate load-bearing capacity, 208 V 60 Hz 3-phase power supply, proper grounding, sufficient space for material handling and cooling/circuit connections. Detailed installation instructions and support are provided by the supplier.

The machine should be operated with appropriate guarding around rotating parts, emergency stop controls, and operator PPE (gloves, eye protection, hearing protection). Follow local safety standards and the manufacturer's safety manual. Additional guarding or interlocks can be added on request.

Production rate depends on material, pitch size, thread length and automation level. With the automatic feeder and continuous operation, the machine supports high-volume production—typically tens to hundreds of pieces per hour. Exact cycle times should be determined in a process trial.

Yes — the machine includes a cooling motor (0.12 kW) and provisions for coolant circulation. Use appropriate cutting/rolling fluid as recommended in the manual to extend die life and improve surface finish.

Suppliers typically provide one-year warranty service, lifetime technical guidance, operator training, installation assistance and support for spare parts. Confirm specific service levels and response times with your vendor before purchase.