Durable Straightening Rollers for Industrial Applications and Efficiency

• Customization: Available
• Application: Machinery Accessory
• Standard: GB, China GB Code
• Model NO.: GC-H88777
• Surface Treatment: Heat Treatment
• Production Type: Mass Production
• Machining Method: CNC Machining
• Material: Steel
• Roller Material: Alloy Tool Steel (42CrMo) High Chromium Cast Iron
• Surface Hardness: HRC 58-62 (Steel Roller) Hra 85-90 (Tungsten Carbi
• Roller Diameter: Φ80-600
• Roller Length: 100-2000mm
• Radial Runout Tolerance: ≤0.01-0.03mm
• Surface Roughness: Ra 0.2-0.8um
• Coaxiality Error: ≤0.015mm
• Roller Design: Cylindrical Hyperbolic Roller (Pipe Straightening)
• Bearing Type: Double-Row Cylindrical Roller Bearings (Bearing Ra
• Single Roller Load Capacity: 50-3000kN
• Surface Coating: Tungsten Carbide Coating (Hv1000-1400) Diamond COA
• Transport Package: Standard Export Packaging
• Specification: Can be customized
• Trademark: GOCHAIN
• Origin: China
• HS Code: 7326909000
• Production Capacity: 5000000
• Package Size: 210.00cm * 25.00cm * 25.00cm
• Package Gross Weight: 55.000kg

Product Description

Product Description

The straightening machine rollers are the core components of the straightening equipment, made of high-hardness alloy steel or composite materials. They are arranged in pairs or groups, and by applying precise pressure, they force the bent metal sheets, pipes or profiles to be flattened or straightened. Their excellent wear resistance, high-precision geometry and strong load-bearing capacity directly determine the quality, efficiency and equipment life of the straightening, and are the key "steel backbone" to ensure the straightness of products in metal processing production lines.
 

 

Detailed Photos

Thermal-mechanical coupling treatment process

Gradient heat treatment: surface high-frequency quenching (≥HRC 60) → core tempering treatment (HRC 38-42)

Residual stress control: cryogenic treatment (-196ºC liquid nitrogen) + aging stress relief to ensure service deformation <0.01mm

Surface working layer

Ultra-hard materials (such as tungsten carbide or ceramic coating) are used, with a hardness of HRA 90 or above, equivalent to 1/3 the hardness of natural diamond, ensuring resistance to micro-cutting wear of metal debris.

Intermediate strengthening layer

Through plasma nitriding treatment, a 0.3-0.5mm compressive stress zone is formed, which effectively inhibits crack propagation and increases fatigue life by more than 3 times.

Tough matrix

Using alloy steel such as 42CrMo, the core maintains a toughness-hardness balance of HRC 35-40 after deep quenching, and can withstand impact loads up to 3000kN without breaking.

Full-process thermal treatment:

The blank is subjected to multi-directional forging to eliminate casting defects, and the material density is >99.5%

The gradient heat treatment forms a continuously changing hardness curve from the surface to the core (surface HRC 62 → transition layer HRC 55 → core HRC 40)

Finally, the metallographic structure is stabilized by -196ºC deep cold treatment, and the service deformation is compressed to within 5 microns

Product Parameters

Straightening Machine Roller Core Parameter Table

Parameter Category	Parameter Name	Standard Range	Unit	Engineering Significance
Basic Properties	Material Type	42CrMo Alloy Steel / Cr15Mo3 High-Cr Cast Iron / WC-Co Carbide	-	Determines wear-resistance/toughness balance (carbide lifespan >10,000 hrs)
	Roll Body Diameter	Φ80-600	mm	Thin materials (<3mm): small rolls Φ80-150 Thick plates (>20mm): Φ300+
	Roll Body Length	100-2000	mm	Matches workpiece width (roll length = width + 100mm safety margin)
Mechanical Properties	Surface Hardness	HRC 58-62 (Steel) HRA 85-92 (Cemented Carbide)	HRC/HRA	High hardness resists wear (+15% lifespan per 1 HRC increase)
	Core Hardness	HRC 35-42	HRC	Ensures impact toughness (Charpy impact ≥40J)
	Radial Load Capacity	50-3000	kN	Calculated by material yield strength (Q235 steel: ≥150kN, titanium alloy: ≥800kN)
	Fatigue Cycle Resistance	10~10	cycles	High-cycle fatigue design (>10 cycles for aerospace grade)
Precision Metrics	Radial Runout Tolerance	≤0.005~0.03	mm	Precision straightening requires ≤0.01mm (1/7 hair thickness)
	Coaxiality Error	≤0.015	mm/m	Affects roll eccentric wear & machine vibration
	Surface Roughness	Ra 0.2~0.8	μm	Mirror-finished rolls (Ra≤0.2μm) for precision strips, sandblasted (Ra0.8μm) for profiles
Thermal Management	Operating Temp. Limit	-40ºC~300ºC	ºC	>150ºC requires heat-resistant alloys (e.g., H13 hot-work steel)
	Cooling Water Flow	2~20	m³/h	Based on thermal power (0.5m³/h per kW)
	Thermal Deformation	≤0.02	mm	Deformation at 100ºC temp. rise (<0.005mm for precision grade)
Dynamic Performance	Max. Linear Speed	0.5~30	m/s	High-speed straightening >15m/s (auto sheet lines)
	Dynamic Balance Grade	G2.5~G6.3	-	High-speed rolls require G2.5 (residual imbalance <1g·mm/kg)
Structural Features	Bearing Housing Type	Double-row cylindrical roller / Spherical roller	-	High rigidity: cylindrical bearings Eccentric loads: spherical bearings
	Cooling Channel Design	Axial straight / Spiral groove / Bionic fractal	-	Spiral groove: 40% higher heat transfer than straight holes
	Surface Treatment	Laser cladding / Plasma spray / CVD	-	CVD diamond coating: friction coefficient <0.05
Lifetime Metrics	Wear-resistant Layer Thk.	3~15	mm	WC layer >8mm allows 3 repairs
	Overhaul Interval	3000~20000	hours	Depends on application (stainless steel: 1/3 lifespan of carbon steel)

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