| Specification | Details |
|---|---|
| Threading Capacity | 100 mm |
| Type of Threading Machine | Rebar Threading Machine |
| Model Name/Number | CDRG45 |
| Automatic Grade | Semi-Automatic |
| Weight | 350 kgs |
| Phase Type | Three Phase |
| Motor Power | 5.5 kW |
| Speed | 62 r/min |
| Brand | Topall Impex |
| Minimum Order Quantity | 5 Piece |
Rebar Threading Machine - Best Rebar Threading Machine Manufacturers & Dealers in Delhi Since 2008 - Topall Impex.
Buy certified rebar threading machine online with assured performance & durability. Limited stock available — get the best deal & order today from barbendingmachine.in A Rebar Threading Machine is a heavy-duty construction machine that cuts precise helical threads onto the end of steel reinforcement bars (rebar). These threads allow rebar to connect with mechanical couplers, creating joints that are stronger than the bar itself — without welding or lap splicing. Used across high-rise buildings, bridges, metro projects, highways, and industrial structures, this machine delivers faster connections, saves steel, and meets international structural standards. At Topall Impex, we are the top Manufacturer of Rebar Threading Machine - TMT Rebar Threading Machine offered by Topall Impex, New Delhi, Delhi. and across India since 2008. Our machines handle bar diameters from 12mm to 50mm, support both taper and parallel thread profiles, and come with full after-sales support and operator training. Whether you are a contractor, builder, or fabricator — we have the right machine for your project.
Contact Topall Impex today for the best rebar threading machine at the best price.
What is a Rebar Threading Machine? - ( रीबार थ्रेडिंग मशीन क्या है?)
A Rebar Threading Machine is a heavy-duty industrial machine that cuts precise helical threads onto the end of a steel reinforcement bar (rebar). These threads allow the rebar to connect directly with a mechanical coupler, eliminating the traditional method of lap splicing or welding.
In simple terms — it works exactly like a bolt and nut system, but for steel rebars used in concrete construction.
The machine removes a thin layer of material from the rebar tip and carves tight, uniform threads. These threads then lock into a coupler, creating a joint that is stronger than the bar itself.
Key Terminology to Know:
- Rebar (Reinforcement Bar): Steel bar used to reinforce concrete structures
- Threading: The process of cutting a spiral groove onto the bar end
- Coupler: A sleeve that joins two threaded rebar ends
- Taper Thread / Parallel Thread: Two common thread profiles used in rebar connections
Where is Rebar Threading Machine Used?
Rebar threading machines are used wherever mechanical rebar splicing is required. This includes:
- High-rise residential and commercial buildings
- Bridges and flyovers
- Metro rail and railway projects
- Highways and road infrastructure
- Dams, tunnels, and underground structures
- Nuclear and thermal power plants
- Industrial plants and warehouses
- Ports and marine structures
- Stadium and sports infrastructure projects
Wherever large volumes of rebar need to be connected quickly, accurately, and with full tensile strength — a rebar threading machine is the right tool.
Why Rebar Threading Machine is Important in Construction
For decades, construction workers joined rebar using lap splicing — overlapping two bars and tying them with wire. While simple, this method wastes steel, adds weight, and weakens the joint zone.
A rebar threading machine solves all of this. Here is why it matters:
1. Stronger Joints Threaded mechanical couplers create joints with 100% or more of the bar's tensile strength. No lap splice can match this.
2. Saves Steel Lap splicing requires 40–60 times the bar diameter as overlap length. Threading eliminates this waste completely.
3. Reduces Congestion in Concrete Dense rebar overlaps make it hard to pour concrete properly. Threaded connections are compact, clean, and allow better concrete flow.
4. Saves Time on Site Threading and coupling is faster than tying lap splices, especially on large infrastructure projects.
5. Meets International Standards Mechanical splicing with threaded couplers is approved under IS, BS, ASTM, and ACI standards — making projects globally compliant.
How Does Rebar Threading Machine Works
Understanding the working process of a rebar threading machine helps you operate it correctly and get consistent results.
Step-by-Step Working Process:
Step 1 — Bar Preparation The end of the rebar is cut cleanly using a rebar cutting machine. A flat, perpendicular cut ensures the thread starts correctly.
Step 2 — Bar Feeding The rebar end is inserted into the machine's chuck or clamping system. The bar is held firmly in place.
Step 3 — Thread Cutting The machine's cutting head — equipped with carbide or high-speed steel dies — rotates and advances along the bar end. It carves a precise helical thread profile as it moves.
Step 4 — Thread Gauging Once threading is complete, the operator uses a Go/No-Go gauge to check thread accuracy. This ensures the thread meets dimensional tolerances.
Step 5 — Thread Protection A plastic cap is placed over the threaded end to protect it during storage and transport.
Step 6 — Coupling on Site On the construction site, two threaded bars are connected using a matching mechanical coupler — either hand-tight or torque-tightened as per specification.
Types of Rebar Threading Machine
Not all rebar threading machines are the same. Different project types and bar sizes need different machines. Here are the main types:
1. Taper Thread Rebar Threading Machine
This machine cuts a conical (tapered) thread on the bar end. The thread gets narrower toward the tip, creating a self-locking connection inside the coupler. It is the most widely used type in India for standard construction projects.
2. Parallel Thread Rebar Threading Machine
This machine cuts a straight (parallel) thread where the thread diameter remains constant throughout its length. It is used for premium mechanical splicing applications and is preferred in seismic zones or high-performance structures.
3. Cold Forging + Threading Machine
Before threading, the bar end is cold forged (upset) to increase its diameter. This allows threads to be cut without reducing the bar's cross-section. Ideal for heavy-duty and critical structures.
4. Automatic Rebar Threading Machine
Fully motorized, with automatic feed, cutting, and retraction. Suitable for high-volume projects where speed and consistency are critical. Minimizes operator effort.
5. Semi-Automatic Rebar Threading Machine
Motor-driven cutting with manual feed control. Balances speed with cost, and is the most popular choice for mid-size contractors.
6. Manual / Portable Rebar Threading Machine
Lighter machines designed for on-site use where portability matters. Suitable for smaller projects or remote locations.
Benefits of Rebar Threading Machine
Here is a quick look at the core benefits that make this machine a must-have on modern construction sites:
Structural Benefits:
- Creates joints equal to or stronger than the bar itself
- Consistent thread quality across every bar
- Suitable for all grades of TMT rebar — Fe415, Fe500, Fe550, Fe600
Project Benefits:
- Speeds up construction timelines
- Reduces steel consumption by eliminating lap lengths
- Minimizes rebar congestion in concrete pours
Financial Benefits:
- Saves 3–5% of total steel cost on large projects
- Reduces labor cost for tying and wire work
- Low maintenance and high machine longevity
Compliance Benefits:
- Meets BIS, ASTM A1034, BS EN ISO 15835 standards
- Required for government and infrastructure projects
- Accepted by all major structural consultants and project management companies
Rebar Threading Machine Specifications to Know
When you are buying or evaluating a rebar threading machine, these are the key technical specifications you must check:
| Specification | What to Look For |
|---|---|
| Bar Diameter Range | Typically 12mm to 40mm (some up to 50mm) |
| Thread Type | Taper or Parallel |
| Motor Power | 1.5 HP to 5 HP depending on bar size |
| Threading Speed | RPM of die head — higher is faster |
| Feed Mechanism | Manual, semi-auto, or automatic |
| Die Material | Carbide-tipped for longer life |
| Thread Length | Depends on coupler size — typically 25mm to 60mm |
| Machine Weight | 60 kg to 250 kg depending on type |
| Power Supply | Single phase or three phase |
| Thread Tolerance | As per IS / ASTM / BS specifications |
Always match the machine's capacity to your most commonly used bar diameter on site.
Applications of Rebar Threading Machine
Rebar threading machines power some of India's most critical infrastructure projects. Here are the top applications:
Civil & Structural Construction Columns, beams, slabs, shear walls, foundations — all benefit from threaded mechanical couplers, especially in tight reinforcement zones.
Infrastructure Projects Metro rail pillars, elevated highways, railway bridges, cable-stayed bridges — all use mechanical rebar splicing as the standard connection method.
Industrial Construction Power plants, refineries, cement plants, and steel mills demand high-strength rebar joints that only threading machines can deliver.
Precast Concrete Manufacturing Precast yards use threading machines to prepare rebar starters and connection bars that must align precisely with cast-in couplers.
Retrofit and Strengthening Work Older buildings and structures being upgraded use threaded rebar to connect new structural elements to existing ones without full demolition.
Advantages of Rebar Threading Machine
Let's go deeper into why more and more structural engineers, contractors, and project managers are specifying threaded rebar connections:
1. Full Tensile Efficiency A properly made threaded joint achieves 100%+ of bar tensile capacity. Lap splices typically achieve only 70–80%.
2. Ductility in Seismic Zones In earthquake-prone regions, threaded mechanical couplers provide better ductility and energy absorption than lap splices.
3. No Heat Affected Zone Unlike welded joints, threading does not alter the metallurgical properties of the rebar. No heat, no HAZ, no risk of embrittlement.
4. Inspection-Ready Joints Threaded joints are visible and auditable. You can inspect, gauge, and verify each connection with a simple go/no-go gauge.
5. Reusable in Some Cases Parallel threaded connections can be disassembled and reassembled — useful in precast or temporary structures.
6. Clean Work Environment No sparks, no fumes, no welding rods, no fire risk. A threading machine creates a safer, cleaner work environment.
Rebar Threading Machine Schedule — What It Is and Why It Matters
A Rebar Threading Schedule is a detailed project document that specifies:
- Which rebar locations require mechanical splicing
- The bar diameters involved at each splice point
- The thread type (taper or parallel) specified by the structural engineer
- The coupler type and grade required
- The inspection protocol and gauging frequency
Why Does It Matter?
On large projects — such as metro stations, bridges, or high-rises — hundreds or thousands of splices are made every day. Without a proper threading schedule, errors in thread type, length, or coupler match can lead to structural non-compliance.
At Topall Impex, we help our clients understand their project threading schedule and recommend the right machine and coupler combination accordingly.
How to Choose the Right Rebar Threading Machine
Buying the wrong machine costs you time, money, and quality. Use this decision framework to choose correctly:
Step 1 — Identify Your Bar Diameter Range What are the smallest and largest bar sizes you will thread on your project? Choose a machine that covers your full range.
Step 2 — Determine Thread Type Does your project specification call for taper threads or parallel threads? This determines the machine type and die head.
Step 3 — Estimate Volume How many bars do you thread per day? For high volumes (100+ bars/day), choose an automatic or semi-automatic machine. For smaller volumes, a semi-auto or manual machine works well.
Step 4 — Consider Portability Is the machine staying in one place (fabrication yard), or does it need to move around a large site? Portability matters.
Step 5 — Check Power Availability Confirm whether single-phase or three-phase power is available at your site or yard. Choose a machine that matches.
Step 6 — Evaluate After-Sales Support Machines need dies, calibration, and occasional repairs. Choose a manufacturer with local support and spare parts availability.
Step 7 — Compare Total Cost of Ownership Do not just compare purchase price. Factor in die life, power consumption, maintenance cost, and downtime risk.
Safety Tips for Operating a Rebar Threading Machine - How to Operate Step-by-Step Guide
Pre-Operation Safety Checklist
- Inspect the machine for loose parts, damaged wires, or oil leaks before starting
- Ensure the die head is clean and dies are properly installed and torqued
- Check that all guards and covers are in place
- Wear appropriate PPE — safety glasses, gloves, steel-toe boots
- Ensure the work area is clean, dry, and free of obstacles
- Confirm power supply voltage matches machine rating
Step-by-Step Operating Guide
Step 1 — Prepare the Rebar End Cut the bar end squarely using a rebar cutter. Remove any burrs or deformations.
Step 2 — Set Up the Machine Select and install the correct die set for the bar diameter. Tighten all die holders as per manufacturer specification.
Step 3 — Clamp the Bar Insert the rebar into the machine's guide bushing and clamp it securely. Ensure it is aligned straight with the threading axis.
Step 4 — Start the Machine Switch on the motor and allow it to reach operating speed before engaging the feed.
Step 5 — Feed the Die Head Apply steady, consistent feed pressure. Do not rush — erratic feeding causes uneven or broken threads.
Step 6 — Complete the Thread Allow the die head to complete its full travel. Retract the head smoothly.
Step 7 — Inspect the Thread Use a Go/No-Go gauge to verify thread dimensions. Reject and re-thread if the gauge does not pass.
Step 8 — Apply Thread Protector Cap Cover the finished thread immediately with a plastic cap to prevent damage during handling.
Post-Operation Safety
- Switch off the machine and disconnect power before changing dies
- Clean the machine after each shift — remove metal chips and apply lubricant
- Store die sets properly in their case to prevent damage
- Never leave the machine running unattended
Rebar Threading Machine Maintenance Tips
A well-maintained machine threads faster, lasts longer, and delivers better quality. Follow this routine:
Daily Maintenance
- Clean metal chips and swarf from the die head and work area
- Check and top up cutting oil / thread cutting fluid
- Inspect die teeth for wear — replace worn dies immediately
- Check clamping mechanism for secure grip
- Lubricate all moving parts as per the manual
Weekly Maintenance
- Inspect electrical cables and connections
- Check motor brushes (on brush motors)
- Calibrate the feed stop for correct thread length
- Tighten all bolts and fasteners
Monthly Maintenance
- Inspect gearbox oil level and quality
- Check chuck / collet for wear and concentricity
- Test thread quality with calibrated gauges
- Review die set performance and plan replacements
Annual Maintenance
- Full machine inspection and overhaul
- Replace worn bearings, seals, and bushings
- Electrical system inspection by a qualified technician
- Recalibrate all thread gauges
Common Problem and Solutions of Rebar Threading Machine
Even the best machines face issues. Here is a practical troubleshooting guide:
Problem 1: Thread is Undersized (Gauge Fails "Go" Test) Cause: Dies are set too wide / worn dies Solution: Reset die closing dimension. Replace worn dies.
Problem 2: Thread is Oversized (Fails "No-Go" Test) Cause: Dies closing too tight / bar not fully inserted Solution: Adjust die closing. Ensure bar is fully seated before threading.
Problem 3: Rough or Torn Thread Surface Cause: Insufficient cutting oil / blunt dies / incorrect feed speed Solution: Apply cutting fluid generously. Replace dies. Reduce feed rate.
Problem 4: Thread Taper is Inconsistent Cause: Bar is not straight / misaligned in chuck Solution: Straighten bar end before threading. Check chuck alignment.
Problem 5: Machine Vibrates Excessively Cause: Loose components / worn bearings / unbalanced die head Solution: Tighten all fasteners. Replace bearings. Balance die head.
Problem 6: Motor Overheating Cause: Overloading / running machine continuously beyond rated duty cycle / poor ventilation Solution: Allow cool-down periods. Check load vs machine capacity. Clean motor vents.
Problem 7: Die Head Does Not Retract Smoothly Cause: Chip buildup / lack of lubrication Solution: Clean chip channels thoroughly. Lubricate retraction mechanism.
Why Choose Topall Impex for Rebar Threading Machine?
With dozens of suppliers in the market, here is what makes Topall Impex the most trusted name for rebar threading machines in Delhi and across India:
16+ Years of Experience (Since 2008) We have been manufacturing and supplying construction machinery since 2008. We understand the real challenges contractors face on site — and we build machines that solve them.
In-House Manufacturing We do not just trade machines — we manufacture them. This gives us full control over quality, specifications, and customization.
Wide Product Range We offer taper thread machines, parallel thread machines, cold forging machines, and complete rebar coupler systems — everything from a single source.
Technical Support and Training Every machine comes with hands-on operator training and full after-sales technical support. Our team is available to visit your site if needed.
Genuine Spare Parts Availability We maintain a complete inventory of dies, chucks, couplers, and wear parts — so your machine never sits idle waiting for a spare.
Compliance-Ready Products All our rebar threading machines and couplers are tested to meet IS, ASTM, and BS standards — ensuring your project stays compliant with structural specifications.
Trusted by Contractors Across India From Delhi NCR to infrastructure projects across India — thousands of contractors, builders, and fabricators rely on Topall Impex machines every day.
Competitive and Transparent Pricing We offer factory-direct pricing with no hidden costs. You know exactly what you are getting and what you are paying for.
Rebar Threading Machine Price / Cost in Delhi, India
Rebar threading machine prices vary depending on type, capacity, automation level, and brand. Here is a general price range to help you plan:
| Machine Type | Approximate Price Range (INR) |
|---|---|
| Manual Rebar Threading Machine | ₹40,000 – ₹80,000 |
| Semi-Automatic Threading Machine | ₹80,000 – ₹1,80,000 |
| Automatic Rebar Threading Machine | ₹1,80,000 – ₹4,00,000 |
| Cold Forging + Threading Machine | ₹3,00,000 – ₹8,00,000 |
| Complete Rebar Coupler System | Custom Quote |
Note: Prices are indicative and may vary based on specifications, bar diameter range, and project requirements. Contact us for an exact quote tailored to your project.
Factors That Affect the Price:
- Bar diameter range (12mm to 50mm)
- Thread type (taper vs parallel)
- Motor power and automation level
- Die material quality (carbide vs HSS)
- Brand reputation and after-sales support
At Topall Impex, we believe that the right machine at the right price saves you far more money on every project than a cheap machine ever could.
Contact Topall Impex (BarBendingMachine.in) For Top Rebar Threading Machine At Best Price in Delhi - Trusted Manufacturers and Suppliers in Delhi Since 2008
Whether you are purchasing your first rebar threading machine or upgrading your existing setup — Topall Impex is ready to help you choose, supply, and support the right machine for your project.
Get in touch with us today:
- Website: BarBendingMachine.in
- Location: Delhi, India
- Serving: Delhi NCR, Noida, Gurgaon, Faridabad, and pan-India
What happens when you contact us?
- Our technical expert understands your project requirements
- We recommend the best-fit machine for your bar sizes and volume
- You receive a transparent, competitive quote
- We arrange a product demonstration if needed
- Machine is delivered, installed, and your operator is trained
Do not settle for machines that slow your project down or deliver inconsistent threads. Choose Topall Impex — where quality, trust, and experience come together since 2008.