Description
The Screw Thread Rolling Machine (Z28-650) is specified for the heavy end of thread rolling: pitches from 1 mm up to 12 mm, threads on high-strength fasteners, and the large-diameter anchor and structural bolts used in energy and infrastructure projects.
What it is built for. The capability that separates this model from smaller machines is not just diameter, it is thread form: coarse threads, trapezoidal threads, large-lead threads and the special profiles used in engineering machinery. Maximum axial feed machining range is 6–150 mm and radial feed range is 6–120 mm, with rolling wheels from 210 mm to 290 mm diameter. Larger wheels carry a longer usable forming face and withstand greater rolling pressure, which is what allows deep thread forms to be rolled to a stable depth rather than approximated.
screw thread rolling machine Highlights at a glance
Material capability. The machine's hydraulic pressure is specified to form high-strength material, making it suitable for grade 8.8 and 10.9 bolts and alloy-steel bolts - the classes where a rolled thread's continuous grain structure is a functional requirement, not a cost saving. At this class of work the alternative is usually cutting, which severs the grain at the thread root and reduces fatigue life exactly where the fastener is most highly stressed.
Why it appears in specific industries. The applications follow the bolt sizes: wind power foundation and tower bolts, photovoltaic support anchor bolts, bridge bolts, mining anchor bolts and support systems, oil and gas pipeline connectors, and threaded parts for construction and engineering machinery. These are the sectors where 8.8 and 10.9 grade fasteners and long anchor bolts are routine, and where a rolled thread's fatigue performance is part of the design calculation.
The machine supports OEM customisation, voltage configuration for the destination market, PLC automatic control, and automatic loading and unloading, with CE certification available.
Z28-650 screw thread rolling machine Key specifications(Z28-650)
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Rolling diameter |
φ120 mm |
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Thread pitch |
1 – 12 mm |
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Maximum axial feed machining range |
6 – 150 mm |
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Maximum radial feed machining range |
6 – 120 mm |
|
Spindle angle |
±10° |
|
Maximum rolling pressure |
650 kN |
|
Spindle speed |
Continuously variable |
|
Rolling wheel range |
Outer diameter 210 – 310 mm · bore φ75 / 100 mm · max width 260 mm |
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Spindle drive / hydraulic power |
18.5 kW / 11 kW |
|
Dimensions / Weight |
2300 × 2400 × 1700 mm / 6000 kg |
|
Automation |
PLC control · automatic loading and unloading system |
|
Options |
OEM customisation · voltage configuration · roller customisation · special thread solutions · CE certification |
One rolling die set typically produces 30,000 to 50,000 workpieces. Contact us for price and a video demonstration
Applications
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Construction |
Anchor bolts, steel structure bolts |
|
New energy |
Wind power bolts, photovoltaic support anchors |
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Mining |
Anchor bolts, support systems |
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Oil and gas |
Pipeline connectors, oil equipment fasteners |
|
Engineering machinery |
Coarse threads, trapezoidal threads, large-lead threads |
FAQ
FAQ
Q: Can it roll grade 8.8 and 10.9 bolts?
A: Yes - the machine's hydraulic pressure is specified to form high-strength material, and it is used for grade 8.8 and 10.9 bolts and alloy-steel bolts. Rolling keeps the grain continuous through the thread, which is why the fatigue behaviour of a rolled high-strength fastener is better than a cut one.
Q: What is the maximum thread pitch?
A: Up to 12 mm. The supported range is 1–12 mm, covering coarse threads, trapezoidal threads, large-lead threads and engineering machinery threads.
Q: How large a workpiece can it take?
A: φ120 mm rolling diameter, with a maximum axial feed machining range of 6–150 mm and radial feed range of 6–120 mm.
Q: Can it be configured for our market?
A: Yes - voltage configuration, OEM branding, roller customisation and special thread solutions are available, with CE certification.
Q: How long does a rolling die last?
A: One die set typically produces 30,000 to 50,000 workpieces, depending on material hardness, thread profile and operating conditions.
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