Common Material Grades
Alloy Steel (Forged Blanks): AISI 4130, 4140, 4340, 8620, 42CrMo4, 30NiCrMo12, etc., are the preferred materials for this type of sleeve.
Carbon Steel: 1045 (C45), etc.
CNC-Machinable Materials: In addition to the steels listed above, these include aluminum alloys, stainless steel, brass, etc.
Dimension Range
Forged Blanks: Outer diameters up to 1000–1200 mm, lengths up to 3000–10,000 mm, and weights up to 12–15 metric tons.
CNC Finishing: The machining range is very broad; some manufacturers specialize in precision long sleeves with diameters of Ø 1–32 mm, while other examples include aluminum alloy sleeves measuring Ø 42 × 52 mm.
Precision: Standard CNC turning tolerances can reach ±0.025 mm, with high-precision machining capable of ±0.005 mm, and surface roughness as low as Ra 0.8 μm.
Main Application Areas
Mold and Plastics Industry: Used as tube mold sleeves for pipe forming, extrusion molds, and similar applications.
General Machinery: Used as connecting components, support components, bearing housings, bushings, and similar parts.
Automotive and Aerospace: Used in powertrain systems, suspension systems, structural components, and similar applications.
Hydraulics and Construction Machinery: Used as critical components in hydraulic parts such as cylinders, pumps, and valves.
We also provide forging blanks and CNC precision machining services for our clients, covering industries such as energy, petrochemicals, steel, engineering machinery, plastics, prevention and control, hydraulics, healthcare, and food. Please feel free to send us drawings for inquiries.
Metalworking Services
CNC Machining
Sheet Metal Fabrication
Metal Welding
Metal Cutting
Metal Bending
Metal Punching
Metal Forging
Metal Sheet Rolling
Tube and Plate Drilling
Our heavy-duty forging presses support open-die forging and deformation of large-section forgings, including discs, shafts, blocks, and custom components. This capability enables us to meet the demanding forming requirements of heavy industrial applications.
Heat treatment is a critical step in achieving the mechanical properties required for heavy-duty forgings. Our process capabilities meet the strength, toughness, and structural stability requirements for forged components used under demanding operating conditions.
We offer machining capabilities for large forged shafts and long cylindrical components, supporting both rough and finish machining. This capacity is suitable for stepped shafts, rotor shafts, rollers, and other heavy-duty forged shaft components.
Our machining facilities are capable of handling large ring-shaped forgings and circular parts that require precise turning, face machining, boring, and contour control. This capability is suitable for industrial ring blanks, heavy-duty circular parts, and machined ring forgings.
We offer machining solutions for heavy-duty cylindrical, hollow, and tubular forgings. This capability supports the machining of sleeves, cylinders, and other thick-walled forged components used in pressure vessels, rotating systems, and general industrial applications.
Quality control is integrated into our production process through the inspection and testing of forged and machined parts. Our capabilities help verify the dimensional accuracy, condition, and quality consistency of industrial forgings prior to delivery.
Finished forgings are properly protected and packaged to minimize the risk of damage during storage and transportation. Our packaging methods ensure the safe domestic delivery and export shipment of machined and high-value forged components.
