Heavy Industrial SPM
Model: NCT-HTR-40T
Comprehensive Machine Overview
The National Cutting Tools Hydraulic Thread Rolling Machine is a high-tonnage industrial cold forming machine designed for rolling high-tensile threads onto scaffolding tie-rods, acme jack screws, anchor bolts, and rebar couplers. Unlike thread cutting which removes metal and severs the natural grain flow of the steel, cold roll forming reorganizes the grain structure through high plastic deformation, increasing thread tensile strength by up to 25% and fatigue life by up to 300%.
Built with a heavy monolithic cast-iron and stress-relieved steel frame, the machine features two or three hardened alloy steel rolling spindles driven by a heavy-duty gearbox and high-pressure hydraulic feed cylinder delivering 15 to 60 metric tons of hydraulic thrust. The through-feed or in-feed rolling cycles produce mirror-smooth DIN, ISO, and ASME ACME thread profiles with exceptional pitch accuracy.
Engineered in Ludhiana for heavy continuous operation, the system is equipped with hardened ground alloy dies (Cr12MoV / D2 steel), integrated flood coolant filtration, and dual-speed hydraulic pressure regulation for high-volume structural fastener manufacturing.
High-Yield Production Capabilities & Advantages
High-Strength Cold Grain Forming
Rolling compresses the steel grain structure rather than cutting it, increasing surface hardness by 15–20% and preventing stripping.
15T to 60T Hydraulic Force
High-pressure hydraulic slide cylinders provide rigid penetration power for high-tensile carbon and alloy steels (Grade 8.8, 10.9).
Through-Feed & In-Feed Capability
Handles long scaffolding tie-rods and coil rods up to 6 meters via continuous through-feed, or short bolts via precision in-feed.
Hardened D2/Cr12MoV Rolling Dies
Precision CNC ground alloy dies deliver Class 6g and 2A/2B thread pitch accuracy over millions of production cycles.
Continuous Industrial Duty
Heavy gear reduction box and high-capacity hydraulic oil heat exchanger ensure 24/7 continuous operation without thermal breakdown.
Engineering Data Matrix
| Technical Parameter | Operational Specification / Value |
|---|---|
| Specification | Details |
| Machine Type | Thread Cutting Machine |
| Material Capacity | Steel, Stainless Steel, TMT Bars |
| Bar/Rod Diameter | 14–40 mm (typical, model dependent) |
| Motor Power | 4–7.5 kW |
| Voltage / Power Supply | 3-Phase, 380 V / 415 V |
| Speed / RPM | 40–80 RPM (adjustable) |
| Thread Length | Up to 80 mm or more depending on machine |
| Thread Pitch / Angle | Pitch: 2.5 / 3.0 / 3.5 mm; Angle: 60° / 75° |
| Clamping Type | Pneumatic or Hydraulic |
| Weight | 330–550 kg (depending on model) |
| Features | Automatic feeding, adjustable dies, durable frame, low maintenance |
Machine Architecture & Mechanical Construction
Heavy Cast Iron / Steel Box Bed
Vibration-damping monolithic chassis engineered to absorb intense radial rolling forces without frame flexing or pitch distortion.
Precision Splined Alloy Steel Spindles
Quenched and tempered alloy steel spindles mounted on heavy cylindrical roller bearings, running in continuous oil-bath lubrication.
Dual-Stage High-Pressure Hydraulic Unit
Hydraulic power pack with proportional pressure regulation, directional solenoid valves, and oil radiator cooling system.
Digital Cycle Controller & Safety Foot Pedal
Touch control panel with rolling timer, cycle counters, emergency reverse, and heavy industrial electrical switchgear.
Industrial Plant Integration & Fabrication Flow
Balanced production beat eliminating fabrication queue bottlenecks.
Bar Peeling & Chamfering
Raw steel bar turned or ground to exact thread pitch diameter with chamfered lead.
Die Set & Timing
Matched 2-roll or 3-roll hardened dies installed and timed for pitch synchronization.
Hydraulic Cold Rolling
Hydraulic slide advances dies, forming high-tensile threads via cold displacement.
Go/No-Go Gauge Quality
100% thread profile validation using optical comparators and ring gauges.
Ludhiana Works QA & Export Packaging Protocol
✓ 48-Hour Pre-Dispatch Run-Off Trials
- • Geometric Alignment: Spindle run-out validation on headstock and tailstock within 0.05 mm using dial test indicators (DTI).
- • Live Arc / Forming Trials: Minimum 25 live continuous operational cycles conducted on actual client tube/metal samples.
- • Electrical & PLC Audit: Full 48-hour burn-in testing of PLC relays, touch screen HMI, and motor thermal limits under full rated load.
- • Run-off recording: The machine is run on your material before crating and the run can be recorded and sent to you for sign-off.
Seaworthy International Packaging (ISPM-15)
- • Corrosion protection: Unpainted machined surfaces, spindles and guide rails are treated with a rust inhibitor and wrapped against moisture for the crossing.
- • Moisture Desiccant Packs: Silica gel packs placed inside electrical cabinets to prevent condensation during humid maritime transit.
- • ISPM-15 Heat-Treated Crating: Solid timber skids and fully enclosed wooden boxes stamped with phytosanitary compliance marks.
- • Container Mooring Points: Heavy-duty internal tie-down brackets ensure zero machine movement inside 20ft/40ft ocean containers.
Frequently Asked Technical Questions
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