GRDH PRECISION

China Industrial Parts Sourcing
from drawing to delivery.

Castings · Forgings · CNC Parts — Made by Qualified Manufacturers

We help overseas industrial buyers source custom mechanical components from China — from process selection and supplier audit to production follow-up, quality control and delivery. Your single point of contact on the ground.

Explore Our Services
Process GuidanceSupplier AuditQC & InspectionSingle Point of Contact
How we work
01Process Guidance
02Supplier Audit
03Quotation & Order
04Production Follow-Up
05QC & Inspection
06Delivery Coordination
Drawing ▸ Audit ▸ Production ▸ QC ▸ Delivery
Our Services

Six Ways We Reduce Your China Sourcing Risk.

From the first drawing review to final delivery, we handle every stage so you get the right parts, from the right factory, at the right price — without managing the supply chain yourself.

Manufacturing process guidance
Service 01

Manufacturing Process Guidance

We evaluate your drawing and application to determine whether casting, forging or CNC machining is the most suitable and cost-effective route.

China supplier qualification audit
Service 02

China Supplier Qualification Audit

We identify and audit manufacturers by capability, equipment, quality system, experience and project fit — only qualified factories reach your desk.

Quotation and order management
Service 03

Quotation & Order Management

We coordinate technical requirements, quotes, production terms, order placement and communication between you and the Chinese manufacturer.

Production follow-up and manufacturing process guidance
Service 04

Production Follow-Up

We track progress, resolve technical issues on site, and keep you updated throughout the entire manufacturing process.

Quality control and inspection
Service 05

Quality Control & Inspection

We coordinate dimensional inspection, material verification, visual checks, functional testing and any other quality checks against your specification.

Shipping and delivery coordination
Service 06

Shipping & Delivery Coordination

We follow up final inspection, packaging, documentation and shipment to make sure your parts arrive on spec and on time.

Parts We Source

What Kind of Parts Can We Source for You?

We source custom metal components across casting, forging and CNC machining — matching each part to the right Chinese manufacturer for quality, lead time and price.

01

Valve Components

  • Valve bodies
  • Valve trims & internals
  • Stainless / alloy steel
02

Pump Components

  • Pump casings & bodies
  • Impellers & shafts
  • Mechanical housings
03

Industrial Machinery Parts

  • Structural components
  • Gears & shafts
  • Custom machine parts
04

OEM / Custom Parts

  • Drawing-based sourcing
  • Small-batch friendly
  • Private label / ODM
How It Works

From Drawing to Delivered Parts — We Manage Every Step.

Sourcing from China is more than finding a cheap supplier. Real risk comes from choosing the wrong process, working with the wrong factory, miscommunicated specs and quality surprises — and we handle all of it for you.

01

Drawing & Requirement Review

We review your drawing, material, application, quantity and target cost to define the project scope.

02

Process & Route Recommendation

We recommend casting, forging or CNC — and the alloy / heat treatment route that fits your requirements.

03

Supplier Identification & Audit

We source qualified manufacturers by capability, quality system and project fit, and present only vetted options.

04

Quotation & Order Placement

We coordinate technical clarification, negotiate terms and manage the full quotation-to-order process.

05

Production Follow-Up

We track progress on site, resolve technical issues and keep you updated with regular status reports.

06

Quality Control & Inspection

We coordinate dimensional, material and functional inspections against your specification before shipment.

07

Packaging & Documentation

We verify packaging, marking, quality certificates and shipping documents meet your requirements.

08

Delivery & After-Sales Support

We coordinate shipment, track delivery and support any post-delivery technical or quality follow-up.

Quality Framework

Quality Control That Stops Problems Before They Ship.

We coordinate every layer of quality control so you don't discover dimensional, material or functional issues after the parts arrive at your door.

Incoming Material
  • Material certificates
  • Heat & batch traceability
  • Alloy verification
In-Process QC
  • First-article inspection
  • Dimensional checks
  • Progress reporting
Final Inspection
  • Critical dimensions
  • Surface & visual
  • Functional checks
Documentation
  • Inspection reports
  • Material test reports
  • Shipping documents
Supplier Audit
  • Capability assessment
  • Quality system review
  • On-site verification
Selected Projects

Real Sourcing Projects. Real Quality Outcomes.

Case 01/Valve · VN Buyer

Stainless Steel Valve Body — Sourced & QC Managed

MaterialStainless Steel (CF8M)
ProcessInvestment Casting + CNC Machining
Our RoleSupplier audit · production follow-up · pre-shipment QC
MarketIndustrial Valve, Global
Customer and project details are confidential.
Case 02/Machinery · TH Buyer

Alloy Steel Shaft — Forging, Machining & Delivery

MaterialLow-Alloy Steel + Heat Treatment
ProcessForging + CNC Turning + QC
Our RoleProcess recommendation · supplier match · inspection coordination
MarketIndustrial Machinery, Global
Customer and project details are confidential.
Who We Are

Your Single Point of Contact for China Sourcing.

GRDH Precision (Dongying Guangrun Donghe Precision Machinery Co., Ltd.) is a China-based sourcing and quality control partner for overseas industrial buyers. We combine engineering judgement, supplier audit capability and on-the-ground production follow-up to reduce the risk of sourcing castings, forgings and CNC-machined parts from China.

01

Engineering First

We start with your drawing and recommend the right process — casting, forging or CNC — before introducing any supplier.

02

Vetted Manufacturers Only

Every factory is audited for capability, equipment, quality system and relevant experience before we source from them.

03

On-Site Production Follow-Up

We are on the ground in China, tracking progress and resolving technical issues before they become delays.

04

Independent Quality Control

Pre-shipment inspection and verification are standard — we don't release parts until they meet your specification.

05

Fast Response

We reply to every inquiry within 2 business hours — wherever you are in the world.

06

Transparent Communication

One contact, one project view, no language gaps. You always know where your order stands and what comes next.

FAQ

Before You Start a Sourcing Project.

What does GRDH Precision do as a China sourcing partner?
GRDH Precision helps overseas industrial buyers source custom castings, forgings and CNC-machined parts from qualified Chinese manufacturers. We handle process guidance, supplier qualification audit, quotation and order management, production follow-up, quality control and delivery coordination — acting as your single point of contact in China.
How do you select and audit Chinese manufacturers?
We evaluate manufacturers based on manufacturing capability, equipment, quality management system (ISO 9001 and related certifications), relevant industry experience, and fit with the specific project requirements. Only qualified factories are presented to the buyer.
What quality control and inspection services do you provide?
We coordinate dimensional inspection, material verification, visual inspection, functional testing and any other quality checks required by the buyer's specification. Pre-shipment inspection and quality documentation are standard before release of goods.
What types of parts can you help source from China?
We source custom castings (stainless steel, carbon steel, alloy steel, nickel/cobalt superalloys), forgings (carbon, alloy and stainless steel grades) and CNC-machined components. Typical parts include valve bodies, pump components, shafts, housings and industrial machinery parts.
Do you work with OEM/ODM and small-batch orders?
Yes. We support OEM/ODM programs and small-batch or custom orders. Our process selection and supplier matching adapt to the buyer's quantity, timeline and technical requirements.
Which markets do you serve and how fast do you reply?
We serve industrial buyers worldwide — including manufacturers, OEMs and engineering companies across Asia, Europe, North America and Oceania. We reply to every inquiry within 2 business hours.

Sourcing Metal Parts From China? Reduce the Risk.

Wrong process, wrong factory, miscommunicated specs, quality surprises — we handle all of it so you get the right parts, on spec, on time.

NDA available on request · Replies within 2 business hours
Reach Us Your Way

Talk to us on the apps you use every day.

We reply within 2 business hours — wherever you are in the world.

LINE Popular in TH Scan the QR or add @505vvcrj — popular in Thailand. Chat now→
Messenger Global Message our Facebook page from anywhere in the world. Chat now→
WhatsApp SE Asia · Global For buyers across Southeast Asia and beyond. WhatsApp QR Chat now→
Email All Markets For drawings, RFQs and formal documents. Send email→