Do you support prototypes and small-batch orders?

Yes. Prototype and small-batch production can be evaluated before volume production. MOQ and lead time depend on material, tooling and process complexity.

How do you protect customer drawings and designs?

Customer drawings, 3D models and technical information are managed confidentially. An NDA can also be signed when required.

From Drawing SS316L Semi-Open Impeller with CNC Machined Bore

Name: From Drawing SS316L Semi-Open Impeller with CNC Machined Bore
Brand: Ningbo Tianhui Machine Co., Ltd.
SKU: 1996199501

Zhejiang, ChinaNingbo Tianhui Machine Co., Ltd.

US$7.18

1-999 Pieces

US$6.95

1,000-9,999 Pieces

US$5.52

10,000+ Pieces

Product profile

Customization

Available

Type

Impeller

Product Item

Pump Component

Model NO.

Customized

Materials

Stainless Steel

Quality Control

Guaranteed

Tolerance Class

0.26..0.8%

Processing Flow

Mold Opening - Wax Shooting - DIP - Shell Making -

Type of Casting

Silica Sol Casting

Hot Treatment

Customized

Surface Treatment

Customized

Make Samples for Delivery

7-10 Days

Massive Delivery

30-60 Days

Customer Visit

Accepted

Process Management

Guaranteed

Continuous Supply

Guaranteed

Lasted Cooperation

Guaranteed

Quick Quotation

Guaranteed

Transport Package

Carton

Specification

80*40

Trademark

Customized

Origin

China

HS Code

8413910000

Production Capacity

5000000

Key features

Custom Material Options: Available in SS304, SS316, CF8, CF8M, Duplex 2205, or custom alloys.

Tailored Dimensions: Outer diameter, inlet size, bore, height, and mounting structures customized per drawing.

Precision Manufacturing: Investment casting combined with CNC machining for high accuracy.

Comprehensive Inspection: Includes CMM, hardness, NDT, dynamic balancing, and material analysis.

ISO 9001 & IATF 16949 Certified: Manufacturing under strict international quality management systems.

Fast Prototype Support: Samples delivered in 7-10 days for evaluation before mass production.

Confidential Design Protection: Customer drawings and 3D models are kept confidential with NDA options.

Custom Surface & Heat Treatment: Surface finishing and heat treatment processes tailored to application needs.

Company profile

High Repeat Buyers ChoiceYears of Export ExperienceExperienced TeamPatents Awarded

Ningbo Tianhui Machine Co., Ltd.

Zhejiang, China

Business Type: Manufacturer/FactoryExport Year: 2007-02-01Nearest Port: ningbo, shanghai, yiwuAverage Response Time: ≤7.81hTerms of Payment: LC, T/T, D/P, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DAT, FAS, DDP, DAP, CIP, CPT, FCA

AI-Powered supplier vetting

SummaryNingbo Tianhui Machine Co., Ltd. is a Chinese manufacturer/factory producing CNC-machined, cast, and forged metal products, with a stated scope also covering hardware machinery, plastics, and electronics. It reports broad customization and ODM capabilities, new product development in the past year, relevant machining and inspection equipment, and experience supplying customers in Japan, Italy, Germany, and automotive-related applications. Export sales are stated at 71%–90%, with 16 years of exporting and self-operated import/export rights. Quality procedures include documented inspection instructions, corrective and preventive action procedures, complaint-handling procedures, and quality assurance. However, the supplier has no overseas agents or branches, warehouse, showroom, or offline trade-show participation, no available SDK, and no valid manufacturing-capacity contract with associated subcontractors. Certification ownership and after-sales service coverage are not sufficiently evidenced.

Supplier typeThe supplier is identified as a manufacturer/factory and a limited company based in Ningbo, China. Its stated business scope includes manufacturing and processing, while its offered products include CNC machining, metal casting, and metal forging.

R&D capabilityThe supplier states that it developed new products during the past year and provides ODM services, indicating product-development capability. It also explicitly reports no available SDK, so its innovation capability is supported for product design and development but not for SDK-based integration.

Production capacityProduction capability is supported by listed equipment including CNC lathes, machining centers, drilling, broaching, testing, and inspection devices, along with a broad manufacturing scope and product range. The supplier reports in-stock capability and substantial export experience, although it lacks a valid contract with associated subcontractors, creating a documented capacity-management limitation.

Customization capabilityThe supplier explicitly offers customization from samples and designs, full and minor customization, flexible customization, and ODM services. These capabilities are supported by its stated R&D activity and design-service capability.

Client casesThe supplier describes exported stainless-steel precision castings, machined components, pump and snow-blower parts, glass clips, tap fittings, meat-grinder parts, automotive fittings, and other industrial components supplied to customers in Japan, Italy, and Germany. Its 16 years of exporting and 71%–90% export-sales share further support international customer experience.

Product Q&A

Q:What causes an impeller to vibrate during operation?

Impeller vibration may result from imbalance, dimensional deviation, improper shaft fit, uneven blade geometry, wear or incorrect installation. The actual cause should be evaluated together with the pump structure and operating conditions.

Q:How should I select the right impeller type for my pump?

Selection depends on the fluid, solid content, viscosity, flow rate, pressure, rotational speed and pump structure. The original drawing or approved sample should be used for final confirmation.

Q:Can an impeller be used with any pump casing?

Not always. Tooling requirements depend on the impeller structure, dimensions, manufacturing process and order quantity. We will evaluate the most suitable solution before quotation.

Q:What information affects impeller service life?

Material compatibility, fluid corrosiveness, abrasive particles, rotational speed, operating temperature, cavitation and installation accuracy can all affect service life.

Q:Can Tianhui manufacture an impeller from an existing sample?

Yes. We can evaluate the sample's dimensions, material and manufacturing feasibility, then confirm the requirements through a drawing or approved sample.