Rebar threading machine for foundation and anchor bolt production
Rebar threading for foundation bolt and anchor bolt production runs.
Heavy Industrial SPM
Model: NCT-HTR-40T
Shop floor
Rebar Threading Machine running at the works
Engineering Dossier
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.
Shop Floor Yield
High-Yield Production Capabilities & Advantages
01
High-Strength Cold Grain Forming
Rolling compresses the steel grain structure rather than cutting it, increasing surface hardness by 15–20% and preventing stripping.
02
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).
03
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.
04
Hardened D2/Cr12MoV Rolling Dies
Precision CNC ground alloy dies deliver Class 6g and 2A/2B thread pitch accuracy over millions of production cycles.
05
Continuous Industrial Duty
Heavy gear reduction box and high-capacity hydraulic oil heat exchanger ensure 24/7 continuous operation without thermal breakdown.
Verified Technical Parameters
Engineering Data Matrix
16 Parameters
✓ Factory Verified
| Technical Parameter | Operational Specification / Value |
|---|---|
| Machine Type | Rebar Threading |
| Material | Steel, Iron |
| Cooling System | Air Or Water Cooled |
| Pattern | Plain |
| Power Source | Electric Or Hydraulic |
| Finish | Galvanized |
| Thread Types | Coarse Thread |
| Production Capacity | 200 To 600 Threads Per Hour |
| Automation Grade | Manual, Semi-automatic |
| Used For | Rebar Fabrication Shops, Construction Sites |
| Speed | Optimized For Fast And Efficient Threading Of Rebar |
| Scratch Resistance | Yes |
| Cost | Generally Less Expensive |
| Function | Creates Threads Specifically On Rebar |
| Manufactured By | National Cutting Tools |
| Country Of Origin | India |
✓ Heavy Rigid IS 2062 Steel Chassis
✓ Delta / Mitsubishi PLC Automation
✓ 48-Hour Live Run-Off Video Protocol
Heavy-Duty Metallurgy & Controls
Machine Architecture & Mechanical Construction
Pillar 1: Structural Casting
Heavy Cast Iron / Steel Box Bed
Vibration-damping monolithic chassis engineered to absorb intense radial rolling forces without frame flexing or pitch distortion.
Pillar 2: Hardened Spindles
Precision Splined Alloy Steel Spindles
Quenched and tempered alloy steel spindles mounted on heavy cylindrical roller bearings, running in continuous oil-bath lubrication.
Pillar 3: Hydraulics
Dual-Stage High-Pressure Hydraulic Unit
Hydraulic power pack with proportional pressure regulation, directional solenoid valves, and oil radiator cooling system.
Pillar 4: Electrical Switchgear
Digital Cycle Controller & Safety Foot Pedal
Touch control panel with rolling timer, cycle counters, emergency reverse, and heavy industrial electrical switchgear.
Turnkey Lineup Flow
Industrial Plant Integration & Fabrication Flow
Balanced production beat eliminating fabrication queue bottlenecks.
Step 01
Stock Prep
Bar Peeling & Chamfering
Raw steel bar turned or ground to exact thread pitch diameter with chamfered lead.
Tol: ±0.03 mm
Step 02
Tooling
Die Set & Timing
Matched 2-roll or 3-roll hardened dies installed and timed for pitch synchronization.
Dies: D2 / HCHCR
Step 03
Forming
Hydraulic Cold Rolling
Hydraulic slide advances dies, forming high-tensile threads via cold displacement.
Force: 15T–60T
Step 04
Inspection
Go/No-Go Gauge Quality
100% thread profile validation using optical comparators and ring gauges.
Class: 6g / 2A
Export Quality Assurance
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.
Operations & Engineering Support
Frequently Asked Technical Questions
2-roll machines are ideal for solid bars, scaffolding tie-rods, and heavy studs where high hydraulic tonnage is required. 3-roll machines exert three balanced radial forces, making them superior for hollow tubes, thin-walled pipes, and precision rebar couplers without deforming the circular tube bore.
Export Sales Desk
Direct Factory Machinery Proposal
Connect with our engineering specialists in Ludhiana. Receive comprehensive technical specifications, power requirements, tooling options, and estimated FOB/CIF maritime rates.
✓ Direct Manufacturer Quotation
✓ Run-off recorded before dispatch
✓ Seaworthy ISPM-15 Wooden Crating
Request Formal Quotation
Please provide production requirements for exact tooling design.
National Cutting Tools Works:
E-452, Phase VI, Focal Point, Ludhiana, Punjab 141010, India
Phone: +91-9888210800 / +91-8434010000
Email: nationalcuttingtools@gmail.com
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