We offer a comprehensive range of precision metal processing equipment, including straightening, cold drawing, pointing, chamfering, cutting, thread rolling machines, and drawing dies, tailored for tube, bar, and wire materials across diverse industries.
FangRong's Carbon Steel Vertical Two Rollers Straightening Machine is designed for correcting bends and deformation in carbon steel bars, rods and tubes after rolling, drawing, heat treatment, forging or handling. The machine uses a vertical two-roller arrangement to apply controlled correction forces while the material passes continuously through the working section.
For carbon steel, machine selection is not determined by diameter alone. Tensile strength, hardness, initial deformation, section geometry, material length and required straightness all affect the required straightening force and roller configuration. FangRong can configure the machine according to the actual material and production requirements.
The workpiece passes between two forming rollers positioned to create controlled bending during feeding. By adjusting the roller position and working pressure, the machine corrects the existing deformation instead of relying on a single heavy pressing action.
This is particularly important for carbon steel bars and tubes because residual bending can remain after rolling, cold drawing, heat treatment or transportation. The required correction depends on where the material is bent, how much deformation is present and how the cross-section responds to the applied force.
| Model | FR-20 | FR-40 | FR-60 | FR-80 | FR-100 | FR-130 | FR-160 |
|---|---|---|---|---|---|---|---|
| Solid Bar Diameter (mm) | φ5–20 | φ10–40 | φ15–60 | φ20–80 | φ25–100 | φ35–130 | φ40–160 |
| Minimum Length (mm) | ≥2000 | ≥2000 | ≥2000 | ≥2000 | ≥2000 | ≥2000 | ≥2000 |
| Maximum Tensile Strength | ≤1000 MPa | ≤1000 MPa | ≤1000 MPa | ≤1000 MPa | ≤1000 MPa | ≤1300 MPa | ≤1300 MPa |
| Surface Hardness | ≤HB380 / HRC42 | ≤HB380 / HRC42 | ≤HB380 / HRC42 | ≤HB380 / HRC42 | ≤HB380 / HRC42 | ≤HB380 / HRC42 | ≤HB380 / HRC42 |
| Raw Straightness | ≤3 mm/m | ≤3 mm/m | ≤3 mm/m | ≤3 mm/m | ≤3 mm/m | ≤3 mm/m | ≤3 mm/m |
| Diameter Tolerance | ≤IT10 | ≤IT10 | ≤IT10 | ≤IT10 | ≤IT10 | ≤IT10 | ≤IT10 |
| Finished Straightness | ≤0.3 mm/m | ≤0.3 mm/m | ≤0.3 mm/m | ≤0.3 mm/m | ≤0.3 mm/m | ≤0.3 mm/m | ≤0.3 mm/m |
| Finished Diameter Tolerance | ≤IT8 | ≤IT8 | ≤IT8 | ≤IT8 | ≤IT8 | ≤IT8 | ≤IT8 |
| Finished Surface Roughness | ≤0.8 μm | ≤0.8 μm | ≤0.8 μm | ≤0.8 μm | ≤0.8 μm | ≤0.8 μm* | ≤0.8 μm* |
| Roller Diameter | φ180 | φ200 | φ260 | φ430 | φ570 | φ460 | φ460 |
| Working Speed (m/min) | 2–30 | 2–10 | 3–15 | 3–15 | 3–15 | 3–15 | 3–15 |
| Main Motor (kW) | 7.5 × 2 | 30 × 2 | 45 × 2 | 55 × 2 | 75 × 2 | 110 × 2 | 110 × 2 |
| Lifting Motor (kW) | 0.75 | 1.1 | 1.5 | 1.5 | 4 | 5.5 | 5.5 |
| Dimensions (L × W × H, m) | 4.7 × 1.7 × 1.8 | 5.7 × 2.0 × 2.2 | 6.6 × 2.3 × 2.6 | 6.6 × 2.3 × 2.6 | 8.1 × 3.1 × 3.6 | 11 × 5.4 × 4.3 | 11 × 5.4 × 4.3 |
| Weight (t) | 2.5 | 5.8 | 10.9 | 16 | 26.2 | 42 | 42 |
| Total Installed Capacity (kW) | 18 | 62 | 110 | 120 | 170 | 240 | 300 |
*For FR-130 and FR-160, the stated finished surface roughness applies to peeled material; black-skin material may require a different finishing condition.
The specifications above are reference values. Final machine selection should be based on the actual carbon steel grade, diameter or tube dimensions, wall thickness, hardness, tensile strength, initial bending, required straightness, surface condition and production rate.
The Carbon Steel Vertical Two Rollers Straightening Machine is suitable for downstream correction where straightness affects machining, assembly, feeding or final product inspection.
For a quotation, FangRong normally needs more than the material name and diameter. Carbon steel with the same nominal size can require different machine configurations because of differences in tensile strength, hardness and initial deformation.
For solid bars, the key information includes diameter, length, material grade, hardness or tensile strength, incoming straightness and required finished straightness. For tubes, outside diameter, wall thickness, material grade, ovality and deformation condition are also important because excessive roller pressure can affect tube geometry.
If several diameters are processed on one production line, the required size range and changeover frequency should also be considered when determining the roller arrangement and machine configuration.
FangRong has manufactured straightening and metal-processing equipment since 1998, with production facilities in Dongguan and Yangjiang. The company has supplied equipment to more than 10,000 customers in over 60 countries and regions.
Manufacturing covers mechanical components, roller production, machine assembly, electrical installation and machine testing. Before shipment, the equipment is inspected according to the agreed technical configuration and operating requirements.
FangRong's quality management system is certified to ISO 9001:2015, certificate No. UQ231211R1. The company also provides CE-marked equipment and SGS inspection services where required.
The company has developed patented technologies for metal-processing equipment, including invention and utility model patents. Patent examples include 2013207829011, 2008300532117 and ZL2015 2 0842922.7.
Large straightening machines are prepared for shipment according to machine dimensions, weight and transportation conditions. Components are protected and secured before loading to reduce the risk of damage during handling and long-distance transportation.
Start with the bar diameter, carbon steel grade, tensile strength or hardness, incoming deformation and required finished straightness. Production speed and bar length should also be considered. Diameter alone is not sufficient for accurate model selection.
The standard solid-bar range covers approximately φ5–20 mm to φ40–160 mm depending on the FR model. The suitable range for a specific material depends on its mechanical properties and deformation condition.
Yes, selected models are designed for materials with tensile strength up to 1300 MPa. The FR-130 and FR-160 models are listed for materials up to this range. Actual suitability should be confirmed against the specific steel grade, hardness and workpiece condition.
Yes, within the Carbon Steel Vertical Two Rollers Straightening Machine's applicable working range. When several diameters are required, roller configuration, adjustment range, changeover requirements and production volume should be considered before selecting the machine.
The listed finished straightness is ≤0.3 mm/m. Actual results depend on material condition, initial deformation, diameter, hardness, roller setup and process adjustment. For a tight straightness requirement, sample material or detailed workpiece drawings are recommended before finalizing the configuration.
Please provide the material grade, solid bar diameter or tube OD and wall thickness, material length, tensile strength or hardness, incoming straightness, required finished straightness, surface condition, required production speed and expected quantity. Photos or drawings of the workpiece are also useful when the section or deformation is unusual.
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NO.163,Shatong Road,Shabu 2nd Industrial Zone, Dalang Town, Dongguan City, Guangdong, China
