Cold Forged Precision Transmission Parts

Core strengths
Why Choose Our Cold Forged Transmission and Connection Components:
40% Strength Increase: Cold work hardening significantly improves material yield strength
Precision up to ±0.01mm: Meets high-precision assembly requirements
Material Utilization Rate >95%: Significantly reduces material waste and production costs
High Consistency in Mass Production: Suitable for large-scale automated production needs
Manufacturing Capability
8-station cold heading forming equipment, maximum forming force 800 tons
CNC precision machining center, positioning accuracy ±0.002mm
Fully automatic heat treatment production line, temperature control ±3℃
Online detection system, real-time monitoring of critical dimensions
Material Science
Established strategic cooperation with Shougang and Baosteel to ensure a stable material supply
Material pretreatment: Spheroidizing annealing, phosphating, and soaping treatment
Each batch of material is traceable back to the steel mill furnace number
Material certification: RoHS, REACH, FDA (food grade optional)
Quality Control
100% dimensional optical inspection
Batch sampling fatigue testing
Metallographic structure analysis
Process capability index CPK≥1.67
Global Certification
ISO 9001:2015 Quality Management System
IATF 16949 (Automotive Industry)
CE, UL, CSA international certification
Compliant with DIN, JIS, ANSI standards

Core Product Introduction

Core Product Series
1. Cold Forged Motor Shaft Series
Micro motor shafts, stepper motor shafts, servo motor shafts, automotive motor shafts
Functional Features:
Precisely transmit torque and speed
Support stable rotation of the rotor assembly
Adapt to high-speed operation environments (up to 50,000 RPM)
Integrated design of various keyways, threads, and gears
Technical Specifications:
Material selection: Low carbon steel, medium carbon steel, alloy steel (SCM440, 42CrMo optional)
Diameter range: φ3mm-φ50mm
Length range: 10mm-500mm
Hardness range: HRC 20-45 (custom heat treatment available)
Straightness: ≤0.01mm/100mm
Concentricity: ≤0.005mm
Core Advantages:
One-piece forming without welding, eliminating stress concentration points
Surface roughness Ra≤0.4μm, reducing friction loss
Dynamic balance grade G2.5, ensuring smooth operation
Fatigue life >10⁷ cycles

2. Cold Forged Door Hinge Series
Cabinet door hinges, heavy-duty door hinges, concealed hinges, special angle hinges
Functional Features:
Achieve smooth door opening and precise positioning
Bear the door body weight and usage load
Provide various opening angle options (90°-270°)
Integrated buffering and self-closing function
Technical Specifications:
Load capacity: 5kg-200kg
Opening/closing cycles: ≥100,000 times
Material selection: Stainless steel 304/316, cold-rolled steel, zinc alloy
Surface treatment: Electroplating, powder coating, PVD (optional)
Installation method: Full overlay, half overlay, inset
Core Advantages:
Three-axis concentricity error ≤0.03mm, smooth opening and closing
Precision bearing structure, friction coefficient <0.1
Salt spray test ≥72 hours without corrosion
Torque stability coefficient of variation <5%

Application Scenarios

Industrial Automation
Industrial robot joint shafts
CNC machine tool spindles
Conveying equipment transmission shafts
Packaging machinery core shafts

Automotive Manufacturing
New energy vehicle motor shafts
Car seat adjustment shafts
Wiper motor shafts
Turbocharger shafts

Home Appliance Industry
Washing machine main shafts
Air conditioner motor shafts
Refrigerator hinges
Oven door hinges

Furniture and Construction
High-end cabinet hinges
Office furniture hinges
Heavy-duty hinges for fire doors
Special hinges for glass doors

Technical Support and Services
1. Demand Communication (1-2 days)
Understand application scenarios
Determine technical parameters
Preliminary solution confirmation

2. Solution Design (2-3 days)
3D model design
Process route planning
Cost calculation and quotation

3. Sample Production (5-7 days)
Mold design and manufacturing
Sample trial production and inspection
Sample delivery and confirmation

4. Mass Production (according to order cycle)
Raw material procurement
Scale production
Full quality inspection

5. Delivery Service (according to agreed time)
Professional packaging
International logistics
Documentation preparation

6. After-sales Service
Quality tracking
Technical support
Continuous improvement
Frequently Asked Questions
Q: What are the maximum length and diameter for cold forged motor shafts?
A: The maximum length we can currently produce is 500mm, and the maximum diameter is 50mm. Special sizes can be custom-developed.
Q: How is the load capacity of door hinges tested?
A: We use a dynamic fatigue testing machine to simulate actual usage conditions for 100,000 opening and closing cycles, ensuring compliance with nominal load requirements.
Q: What is the Minimum Order Quantity (MOQ)?
A: The MOQ for standard products is 500 pieces. The MOQ for customized products varies depending on the complexity; please inquire with specific requirements.
Q: How long does the delivery time usually take?
A: Samples 7-10 days, mass production usually 15-30 days, depending on product complexity and order quantity.
Q: Do you provide surface treatment services?
A: Yes, we provide various surface treatment options such as electroplating, powder coating, blackening, and PVD.
Get Free Samples and Quotation
We believe seeing is believing, and we offer sample services so you can personally experience our product quality.

Why choose us
Rich Experience
15 years of professional cold forging experience
Serving customers in over 30 countries worldwide
Providing supporting products for Fortune Global 500 companies
Quick Response
Sample delivery: 5-7 working days
Regular orders: 15-20 days delivery
Emergency orders: 72-hour fast track
Cost Advantage
Economies of scale reduce costs
High material utilization reduces waste
Automated production improves efficiency
Comprehensive cost is 30-50% lower than machining