About GKZG

Quality Built into Every Wheel

Reliable wheel supply depends on consistent control from material review through welding, dimensional inspection and shipment preparation. GKZG coordinates each stage around the confirmed wheel specification and customer requirements.

EXPLORE MANUFACTURING & QUALITY

Material Control

Wheel-grade material requirements are reviewed against the confirmed drawing, application and customer specification before production.

Welding Control

Weld formation and seam condition are checked through the applicable production stages for the selected wheel design.

Dimensional Inspection

Runout, balance and critical fitment dimensions are inspected according to the applicable wheel specification and agreed requirements.

Shipment Protection

Finished wheels are prepared and packed to protect their surfaces and condition during handling, loading and international transport.

Company Profile

Gongka Heavy Industry Machinery (Shandong) Co., Ltd. (GKZG) is a member company of Zhengyu Wheel Group.

We provide wheel solutions for truck and bus, agricultural machinery, construction equipment and forklift applications. Buyers can work with one team to review product selection, drawings, fitment data, finishes, inspection documents and export requirements.

VIEW PRODUCT RANGE MANUFACTURING & QUALITY

GKZG company and wheel manufacturing overview

Examples of GKZG wheel vent and disc configurations

Custom Wheel Engineering Support

Custom wheel projects begin with confirmed application and fitment information. Share your drawing, sample or reference data so our team can review technical feasibility before tooling or production.

Vent and disc layout review
Drawing or sample-based development
Finish and color confirmation
Technical and commercial follow-up

For a faster review, include the wheel size, bolt pattern or PCD, center bore, offset, finish, target quantity and destination market.

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Wheel Packaging & Shipping

Packing is selected for the wheel finish, order quantity and shipment route. These factory examples show wrapped stacks, palletized wheels and boxed dispatch preparation.

DISCUSS PACKING REQUIREMENTS

**Wrapped Wheel Protection**Wrapped wheel stacks prepared for warehouse handling.

**Palletized Wheel Stacks**Grouped and secured for shipment preparation.

**Boxed Shipment Preparation**Cartons assembled on pallets for organized dispatch.

Final packing materials, stacking method and labeling are confirmed with each order before shipment.

Manufacturing Equipment

Production is supported by robotic handling, CNC machining and dedicated wheel testing equipment. The equipment route and process controls are selected according to the confirmed wheel design, material and application requirements.

EXPLORE MANUFACTURING & QUALITY

Robotic Handling at the GKZG wheel manufacturing facility — **Robotic Handling**Automated handling supports repeatable movement between machining operations.

Automated Production Line at the GKZG wheel manufacturing facility — **Automated Production Line**Integrated equipment supports controlled, continuous wheel production.

Wheel Testing Equipment at the GKZG wheel manufacturing facility — **Wheel Testing Equipment**Dedicated equipment is used to evaluate wheel performance against confirmed requirements.

CNC Machining at the GKZG wheel manufacturing facility — **CNC Machining**CNC equipment supports accurate machining of critical wheel dimensions.

CNC Production Line at the GKZG wheel manufacturing facility — **CNC Production Line**Multiple machining stations support organized production flow and process consistency.

Wheel Production Process

Process routes are organized by wheel construction and finish. The final sequence, inspection points and control requirements are confirmed against the approved drawing and product specification.

Steel Rim Production

SlittingSurface preparationCutting & markingRollingButt weldingWeld finishingRounding & flaringSpin formingRoll formingSizingAir-tightness checkValve-hole forming

Steel Disc Production

LevelingCircle cuttingPunchingSpinning & shapingVent-hole punchingFace flatteningCenter-hole machiningDiameter adjustmentFlatness correctionBolt-hole machiningMarking

Wheel Assembly

Press fittingSpot weldingCircumferential weldingSlag removalLateral & radial runout inspectionBalance inspection

Surface Coating

DegreasingWashingPicklingNeutralizationPhosphatingElectrophoretic coatingDryingPaint or powder coatingFinal preparation

Forged Aluminum Wheels

Bar inspectionSawingHeatingForgingSpinningT6 heat treatmentCNC machiningPolishingCleaning, marking & packaging

Steel wheel rim finishing operation at the GKZG factory

Process Control & Inspection

Wheel manufacturing requires control of forming, welding, machining and surface preparation. Inspection points are selected according to wheel type, the approved drawing and customer requirements.

Critical dimensional inspection
Lateral and radial runout checks
Balance and air-tightness checks where applicable
Weld and surface-finish review

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Certifications &
Market Compliance

Available management-system and market documents are shown below. Scope and product applicability depend on the wheel specification and destination market.

REQUEST CURRENT DOCUMENTS

ISO 9001VIEW DOCUMENT

INMETROVIEW DOCUMENT

DOTVIEW DOCUMENT

EACVIEW DOCUMENT

IATF 16949VIEW DOCUMENT

Engineering Drawings

Reference drawings illustrate wheel profiles, fitments and dimensional layouts. Submit your application data or drawing for a project-specific technical review.

SUBMIT A DRAWING