Riverhobby Tech (Shenzhen) Co., Ltd.
Riverhobby Tech (Shenzhen) Co., Ltd.
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About Manufacturing

Factory Overview

Established in 2008, with 19 years of professional experience in the R&D and manufacturing of RC models.

A 10,000-square-metre physical manufacturing facility.

A team of 200 people, including dedicated R&D and design, manufacturing, and full-time QC teams that rigorously implement the ISO 9001 system.

A complete range of 1/24- to 1/5-scale electric and nitro RC vehicles, plus a full selection of upgrade and replacement parts.

Primarily serves overseas wholesalers, regional dealers, leading industry brands seeking stable contract manufacturing, and other OEM/ODM customers worldwide.

Stable monthly capacity of more than 6,000 high-specification complete vehicles, supporting efficient delivery of large international orders.

Full support is available. As a source manufacturer with integrated R&D and production, we provide private labeling and packaging customization as well as in-depth OEM/ODM development—from chassis iteration and trial-mold refinement to complete-vehicle production.


  • Direct factory supply and channel protection: no middleman markup, flexible MOQs and attractive distributor margins.

  • 19 years of integrated R&D and manufacturing: a complete industrial chain from concept development to mold production, backed by substantial technical expertise.

  • Strict quality control and compliance: all products follow ISO 9001 quality standards, with active preparation for CCC and other market-access certifications to ensure stable, reliable quality.

  • Comprehensive channel support: a well-stocked after-sales parts supply chain, plus strong marketing materials and repair guidance for dealers.


Production Lines

Production Lines

Our manufacturing facility operates four main production lines covering component assembly and processing, functional inspection and testing, and final packaging. Each assembly line specializes in different RC vehicle scales and supports key processes such as chassis assembly, shock-oil filling, differential tuning, electronic wiring, and integrated system testing. With an average capacity of approximately 1,500 units per line per month, total monthly output exceeds 6,000 units. Standardized operating procedures and dedicated IPQC inspectors ensure consistent quality at critical checkpoints. The flexible production system also allows multiple RC car models to be manufactured simultaneously, with rapid model switching to meet bulk orders and peak-season demand.

Injection Molding

Our in-house injection molding capabilities cover component production, mold development, and quality inspection, providing precise and durable plastic parts for RC cars.

In-House Component Production
In-House Component Production

Nine imported servo injection molding machines process ABS, PA66, PA66+GF15, and PA66+GF30 for lamp covers, bumpers, wheel rims, chassis plates, and other RC car components.

Precision Mold Development and Stable Molding
Precision Mold Development and Stable Molding

Our professional team uses UG and Pro/E for mold design, supported by in-house CNC, EDM, and wire-cutting equipment. Mold accuracy reaches ±0.02 mm, while closed-loop process control maintains batch consistency above 99%. Typical mold lead time is 30–45 days.

Performance and Quality Control
Performance and Quality Control

Critical mounting features are controlled to ±0.05 mm, while optimized molding parameters improve PA66+GF30 impact strength by over 30%. Quality control includes first-article dimensional verification, 100% visual inspection, and periodic tensile-strength testing.

Assembly Workshop

Main Processes
Main Processes

Shock absorber assembly → differential assembly → front and rear module assembly → complete chassis assembly → tyre processing → vehicle calibration and functional testing → packaging.

In-station Inspections
In-station Inspections

A combination of operator self-inspection and online reinspection at critical checkpoints is used, with quality gates after each core station.

Standard Work Instructions
Standard Work Instructions

ISO 9001-standardized SOPs have been fully implemented.

Different Assembly Flows
Different Assembly Flows

Production routes can be flexibly switched according to the power system and vehicle scale.

Functional and Appearance Inspection
Functional and Appearance Inspection

The final-assembly workshop has four lines. Each line is led by an experienced supervisor with strong quality awareness, product knowledge and accountability. Front-line employees receive scheduled and ad hoc training on operations and process details, while dedicated quality staff jointly monitor every line.

Assembly-team and Staffing
Assembly-team and Staffing

The final-assembly workshop has four lines. Each line is led by an experienced supervisor with strong quality awareness, product knowledge and accountability. Front-line employees receive scheduled and ad hoc training on operations and process details, while dedicated quality staff jointly monitor every line.

QC Process

QC Process

Incoming Quality Control (IQC)
In-Process Quality Control (IPQC)
Final Quality Control (FQC)
Outgoing Quality Control (OQC)
Nonconforming Product Control
Inspections at Each Stage
Incoming Quality Control (IQC)
  1. After materials arrive, the warehouse submits an inspection request to IQC.

  2. Inspectors verify the material name, part number, batch, quantity, supplier and certificate.

  3. Samples are selected according to inspection SOPs, drawings, BOMs and AQL standards.

  4. Appearance, dimensions, performance and material identity are checked.

  5. Accepted materials are signed off and stored; rejected materials receive an incoming-material exception report and are conditionally accepted, sorted, returned or reworked.


In-Process Quality Control (IPQC)
  1. IPQC patrols the line every 1–2 hours.

  2. Operator methods, tooling, equipment parameters and materials are verified.

  3. First Article Inspection (FAI) is mandatory after shift, product, mold or material changes. Batch production begins only after dimensions, appearance and performance pass.

  4. Semi-finished goods are sampled and patrol records completed.

  5. Minor issues are corrected immediately; batch abnormalities stop production until Production and Engineering complete analysis and corrective action.


Final Quality Control (FQC)
  1. Production submits finished goods for inspection.

  2. FQC applies AQL sampling to appearance, dimensions, assembly, functions, labels, packaging and accessories.

  3. Drawings and customer requirements are checked.

  4. Accepted goods are labeled and stored.

  5. Rejected goods are isolated and reworked, then reinspected; irreparable goods are scrapped.


Outgoing Quality Control (OQC)
  1. The warehouse requests OQC inspection before shipment.

  2. Order number, customer, quantity, carton marks and packaging are verified.

  3. Finished-product quality and the shipping list are sampled again.

  4. Shipment is released only after a certificate of conformity is issued.

  5. Nonconforming shipments are held until correction and reinspection.


Nonconforming Product Control
  1. Segregate and red-tag nonconforming products.

  2. Quality, Production and Engineering decide on rework, sorting, concession with customer approval, or scrap.

  3. Quality tracks corrective actions to prevent recurrence.

  4. All exception records are archived for traceability.


Inspections at Each Stage

Incoming inspection focuses on electronic-component impedance, selected waterproof tests, metal-part tolerances, hardness and salt-spray testing. Production performs 100% smoothness tests on drivetrains and shock/suspension systems. Finished vehicles undergo pull-deviation checks and four-wheel alignment. Before shipment, packaging protection and accessory completeness are verified.

Testing Process

Tests Required Before Shipment

Appearance: scratches, dents, assembly misalignment and crooked decals.
Powered functional checks: forward/reverse throttle, braking, left/right steering, gyro and lighting.
Final screw-tightness check.
Idle and steering-travel calibration, including servo centering.
Powered operation with no intermittent faults before packing.
Accessory count: transmitter, battery, charger and tools.
Overall Testing

Overall Testing

01
Remote-control test

pairing, short-range signal and button response, neutral calibration and interference checks; long-range endurance is sampled.


02
Speed test

short-distance forward, reverse and brake checks; full- and low-speed modes; top speed by sampling.

03
Runtime test

continuous loaded driving to verify full runtime against the stated specification, by batch sampling.

04
Drop test

free drops from 0.8–1.2 m on six faces, edges and corners; parts must remain attached, PCBs unsoldered and chassis unbroken.

05
Aging test

30–60 minutes of continuous powered operation with repeated throttle and steering cycles to detect intermittent faults, cold solder joints and poor contacts.

06
Impact test

simulated jump landings and rough-road conditions, including impact-load and vibration-durability tests, to assess the chassis, suspension arms, upper deck and drivetrain.

Packaging Process

How does our packaging process work?

Functional test → appearance cleaning and inspection → body installation on chassis → colour box → manuals and accessories → master carton → quality

Whether standard packaging, customized branded packaging, and OEM packaging are supported

Yes.

Whether a final inspection is conducted before packaging

Yes.

What are package contents e.g. vehicle, controller, battery, charger...

According to order requirements.

Measures taken to protect the products during transportation

A dual-buffer structure combines a model-specific impact-resistant inner tray with a thick, high-basis-weight outer carton. Internal supports are customized for each vehicle scale.

Whether packaging drop tests or outer-carton inspections are conducted

Yes.

Whether multilingual manuals, labeling, barcodes, and customer-specific SKU labels are supported

Yes.

What is your experience in export packaging

We understand international sea-freight pallet stacking and carton-entry requirements for cross-border platforms such as Amazon FBA. Optimized carton dimensions help overseas distributors significantly reduce per-unit logistics costs.

Company News
We race extremely – pushing limits, fueling passion, and crafting precision. At VRX Racing, we engineer high-performance remote control cars that redefine speed, innovation, and the thrill of the race.
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