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Precision CNC Machining Seamless Rectangular Tubes / Round Hole Steel Tubes

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Precision CNC Machining Seamless Rectangular Tubes / Round Hole Steel Tubes

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Brand Name : Qingdao Sande Technology Co., LTD

Model Number : OEM

Certification : ISO, DIN, AISI, ASTM, BS, JIS, etc.

Place of Origin : Qingdao, China

MOQ : 1000

Price : $0.5-2

Payment Terms : D/P,T/T,Western Union

Supply Ability : 10000PCS/month

Delivery Time : 30 days

Packaging Details : Wooden case

Lead Time : 30-40days

Plating : Zinc

Durability : long-lasting

Product_Name : Machining Parts

Strength : high strength

Surface : Anodized

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CNC precision machining of seamless square tubes/round hole steel tubes

Product Description

We specialize in high-precision CNC machining of seamless thick-walled steel tubes with outer square and inner round profiles, designed for structural, mechanical, and industrial applications. Our advanced machining capabilities ensure tight tolerances, superior surface finishes, and complex geometries for custom tube components.

Key Features & Benefits

✔ Premium Material Selection

  • Carbon Steel (Q235, 20#, 45#)

  • Alloy Steel (4140, 4340)

  • Stainless Steel (304, 316)

  • Aluminum & Other Metals (Upon Request)

✔ Precision CNC Machining Capabilities

  • Tolerances: ±0.05mm (Standard) | ±0.02mm (High Precision)

  • Wall Thickness: 3mm–50mm (Customizable)

  • Outer Square Sizes: 20mm×20mm – 300mm×300mm

  • Inner Round Bore: Ø10mm–Ø250mm

  • Surface Finish: Ra 0.8–3.2μm (Grinding/Polishing Available)

✔ Machining Services

  • Drilling & Boring – Precision hole machining for fittings and assemblies

  • Milling & Grooving – Custom slots, keyways, and threads

  • Cutting & Deburring – Smooth edges for safety and functionality

  • End-Facing & Chamfering – Ready-to-install tube ends

✔ Customization & Rapid Prototyping

  • Tailored Dimensions – Adjustable length, wall thickness, and bore size

  • Secondary Processing – Heat treatment, galvanizing, powder coating

  • Fast Turnaround – Prototypes in 5–7 days | Production in 10–20 days

✔ Quality Assurance

  • 100% Dimensional Inspection (CMM, Laser Measurement)

  • Material Certification (MTC, SGS, EN 10204-3.1)

  • Non-Destructive Testing (UT, Eddy Current)

Product parameters :

1. Basic Parameters

Parameter Specification
Material Carbon Steel (Q235, 20#, 45#), Alloy Steel (4140, 4340), Stainless Steel (304, 316), Aluminum
Outer Shape Square, Rectangle (Custom Profiles Available)
Inner Shape Precision Round Hole
Outer Size Range 20mm × 20mm – 300mm × 300mm
Inner Diameter Ø10mm – Ø250mm
Wall Thickness 3mm – 50mm (Adjustable)
Length 50mm – 6000mm (Custom Lengths Supported)

2. Machining Capabilities

Process Tolerance Surface Finish (Ra)
CNC Drilling/Boring ±0.05mm 1.6–3.2μm
CNC Milling (Slots/Keyways) ±0.03mm 0.8–1.6μm
Threading (Metric/UNC) ±0.02mm 1.6μm
Cutting & Deburring ±0.1mm 3.2μm (Smooth Edge)
End-Facing/Chamfering ±0.05mm 1.6μm

3. Performance & Testing

Property Standard Testing Method
Straightness Tolerance ≤0.1mm/m Laser Measurement
Roundness Tolerance ≤0.05mm CMM Inspection
Hardness (HRC) 20–55 Rockwell Test
Pressure Resistance 10–50MPa Hydrostatic Test
Salt Spray Resistance 500–1000h ASTM B117

4. Customization & Logistics

Option Details
Coatings Galvanized, Powder Coated, Anodized (Aluminum)
Marking Laser Engraving, Dot Peen
Certifications ISO 9001, EN 10204-3.1, RoHS
Prototype Lead Time 5–7 Days
Mass Production 10–20 Days (MOQ: 100pcs)
Packaging PVC Wrapping + Wooden Crates (Export Standard)

Applications

  • Construction & Architecture – Structural frames, railings, support columns

  • Machinery & Automation – Hydraulic cylinders, linear guides, robotic arms

  • Energy & Oil/Gas – Pipeline systems, pressure vessels

  • Transportation – Chassis components, roll cages

Why Choose Us?

✅ Advanced CNC Equipment – Multi-axis machining centers & lathes
✅ Engineer Support – DFM optimization & CAD/CAM assistance
✅ Competitive Pricing – Cost-effective for both prototypes & bulk orders
✅ ISO 9001 Certified – Reliable quality control


Product Tags:

Precision Machining Seamless Rectangular Tubes

      

CNC Machining Seamless Rectangular Tubes

      

CNC Round Hole Steel Tubes

      
China Precision CNC Machining Seamless Rectangular Tubes / Round Hole Steel Tubes factory

Precision CNC Machining Seamless Rectangular Tubes / Round Hole Steel Tubes Images

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