Turbocharger turbine wheels · the exhaust-driven wheel that turns the compressor through a shaft, speeds up to 350,000 rpm, nickel-based superalloy investment castings, wheel diameter, and shaft-and-wheel rotor assemblies
In a turbocharger, the turbine wheel sits in the exhaust stream. Exhaust gas spins it, and a shaft carries that rotation to the compressor wheel, which compresses intake air for the engine. Ask three things first: which turbocharger model or drawing the wheel must match, what material and casting quality are required, and whether you need the wheel alone or welded to its shaft as a balanced rotor.
Turbine wheels for exhaust-gas turbochargers, as castings, machined wheels or shaft-and-wheel assemblies. Steam and gas turbine rotors, rotor forgings and compressor wheels are outside this page except where compared.
Start with your task
01
Garrett Motion, a turbocharger maker, explains that a turbocharger uses an engine's exhaust gas to drive the turbine wheel at up to 350,000 rpm. The turbine wheel drives the compressor wheel through a shaft, and the compressor supplies compressed air to the engine. The air passes through a charge-air cooler to increase its density before it enters the engine, so that fuel burns more efficiently for more power and better fuel economy. [1]
Garrett describes the turbocharger as a component highly customised for the engine; match any replacement wheel to the turbocharger model or drawing. [1]
A turbocharger patent from Honeywell (US 10,047,607) notes that exhaust temperatures may exceed 500 °C for a diesel engine and 1000 °C for a gasoline engine, which calls for high-temperature turbine wheel materials. The shaft may be a moderate-temperature alloy turned on a lathe, while the turbine wheel is cast in a high-temperature ceramic, metal or alloy such as a nickel-chromium superalloy. [4]
A BorgWarner balancing patent (US 10,202,850) describes a turbine wheel cast from a nickel-based superalloy of over 70% nickel by weight, making up about 5% of the weight of the whole turbocharger, and gives rotational speeds of 80,000 to 300,000 rpm. It explains that rolling-element bearings have a fatigue life sensitive to the loads from wheel imbalance, so imbalance must be kept as low as possible. [5]
Give the supplier the turbocharger make and model or the wheel drawing, the outside diameter and blade geometry, the material and casting standard, whether the wheel is supplied alone or welded to the shaft, the balance grade, the inspection required (for example X-ray, dimensional and material certificates) and the quantity.
02
Taiyuan Simis Investment Casting, a Chinese foundry, states that its vacuum investment casting foundry produces turbine wheels for automobile turbochargers in nickel-based superalloy, with outside diameters from 50 to 500 mm, under ISO and TS16949 certification. [2]
Wuxi Shengyi Industry, a turbocharger parts maker, lists shaft rotors and rotor assemblies (shaft and wheel) by turbocharger model, such as GT3076, CT9 and TA45, alongside compressor wheels, bearings and housings. Ask whether the wheel is supplied welded to its shaft and balanced. [3]
03
US patent 10,047,607 lists ways of joining a shaft to a turbine wheel: electron beam welding, in which the parts are placed in a vacuum and an electron beam is focused on the joint; laser beam welding; and friction welding, in which one part is rotated against the other until heat melts material at the joint. It states that a weld should need minimal post-weld machining and should not introduce excessive stresses, and that the assembly must withstand temperature variation and centrifugal loading without deforming, since deformation can alter balance, introduce noise and shorten life. [4]
US patent 10,202,850 describes balancing in stages. The shaft-and-turbine wheel subassembly is first balanced, then fitted in its bearing with the compressor wheel secured by a locknut. The rotating assembly is then tested at low speed and at high speed inside the bearing housing. Corrections are made by removing material from the peripheral edge of the turbine wheel backwall, between adjacent blades, and from the compressor wheel. The patent notes that balancing inside the housing avoids grinding debris entering the bearing cartridge. [5]
Editorial calculation: at 300,000 rpm a turbine wheel of 50 mm outside diameter, the smallest size Simis lists, has a tip speed of π × 0.050 m × 300,000 ÷ 60 ≈ 785 m/s. The pairing of that diameter with that speed is an assumed example; ask the supplier for the design speed and burst margin of your wheel. [5] [2]
Ask the supplier how the wheel is joined to the shaft, which inspection is applied to the weld, at what stage the wheel is balanced and to what limit, and whether balance corrections are cut from the backwall.
Give the supplier the turbocharger model or drawing, wheel outside diameter and blade count, alloy grade, supply form (wheel only or welded to the shaft), joining method, weld inspection, balance grade and stage, and quantity.
04
This is a functional reference built from the sources cited; it is not one maker's specification.
| Part | Role | Fix in the order |
|---|---|---|
| Turbine wheel | Driven by exhaust gas. [1] | Model; OD; material. |
| Shaft | Carries rotation to the compressor wheel; welded to the wheel. [1] [3] [4] | Wheel alone or shaft and wheel. |
| Compressor wheel | Compresses intake air. [1] [3] | Matched set or separate. |
| Turbine housing | Surrounds the turbine wheel. [3] [2] | Supplied or not. |
| Bearing cartridge | Supports the rotating assembly; life sensitive to imbalance. [5] | Bearing type. |
| Locknut | Secures the compressor wheel on the shaft. [5] | Torque; balance stage. |
05
A turbine wheel quotation needs values for your turbocharger. The table explains each field, gives published values where a reviewed source states them, and says what to ask the supplier for.
| Field | What it means and published values | Ask the supplier for |
|---|---|---|
| Speed | Up to 350,000 rpm [1]; 80,000–300,000 rpm. [5] | Design speed and burst margin. |
| Material | Examples: nickel-based superalloy [2]; over 70% nickel by weight. [5] | Alloy grade; certificate. |
| Size | Example: OD 50–500 mm. [2] | Drawing; tolerances. |
| Process | Example: vacuum investment casting. [2] | Casting inspection. |
| Supply form | Wheel alone or shaft and wheel [3]; electron beam, laser or friction welded. [4] | Welding; balancing. |
| Balancing | Subassembly, then low- and high-speed in housing; material removed from backwall. [5] | Balance grade; stage. |
| Exhaust temperature | Above 500 °C diesel, 1000 °C gasoline. [4] | Rated inlet temperature. |
06
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Turbo: [make; model; part number] Wheel: [OD; blade count; drawing] Material: [alloy; casting standard] Form: [wheel only; shaft and wheel] Quality: [balance grade; X-ray; dimensional report] Quantity: [pieces]
These companies list turbocharger turbine wheels or shaft-and-wheel rotors.
Lists vacuum investment-cast turbocharger turbine wheels in nickel-based superalloy, 50–500 mm OD.
Product scope checked 2026-10-11
Lists turbocharger shaft rotors and shaft-and-wheel rotor assemblies by turbo model.
Product scope checked 2026-10-11
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
Engine exhaust gas drives it, and it turns the compressor wheel through a shaft. [1]
Garrett states up to 350,000 rpm. [1]
One investment caster lists nickel-based superalloy for turbocharger turbine wheels of 50–500 mm OD. [2]
Patents describe electron beam welding in a vacuum, laser welding and friction welding. [4]
One patented method balances the shaft-and-wheel subassembly, then tests the assembled rotor at low and high speed and removes material from the wheel backwall. [5]
Sources checked 2026-10-12. Garrett Motion describes how turbochargers work. Simis and Shengyi describe their own products; their figures are examples, not limits.
Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.
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