Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of cold heading in China. Please feel free to buy durable cold heading made in China here from our factory. All customized products are with high quality and competitive price.
Forming Capabilities
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Material Types |
Component Types |
Key Features |
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Quality carbon structural steels (SWRCH/ML series: ML10, ML15, ML20, ML35, ML40Cr, etc.) |
Cylindrical/solid components, stepped pins, fasteners |
Upsetting, extrusion, forward/backward piercing |
|
10#, 20#, 45# carbon steels; 20Cr, 40Cr alloy steels |
Structural fasteners, stepped shafts, bearing components |
High strength, consistent hardness, excellent fatigue resistance |
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304/316 stainless steels |
Hollow components, bushings, sleeves, corrosion-resistant fasteners |
Multi-diameter profiles, blind holes, through-holes |
|
Red copper, H59/H62 brass |
Conductive parts, electrical contacts, terminal-type components |
Tight-radius fillets, burr-free parting, high conductivity |
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6061 aluminum alloy |
Lightweight structural parts, battery pack structural components |
Controlled grain flow, work-hardened surfaces |
Process Specifications
|
Parameter |
Value |
|
Equipment |
Ten 6-station cold heading platforms (all < 5 years old) |
|
Weekly Capacity |
420,000+ pieces |
|
Material Diameter Range |
Φ2mm – Φ20mm |
|
Part Length Range |
3mm – 150mm |
|
Tolerances |
±0.02mm (critical features) |
|
Secondary Operations |
CNC turning, threading, drilling, slotting |
|
Certifications |
IATF 16949 (Quality Management), ISO 14001 (Environmental), ISO 45001 (Occupational Health & Safety), IECQ QC080000 (Hazardous Substance Process Management) |
Performance Highlights
6-station integral forming – Complex geometries - stepped diameters, flanges, undercuts, blind holes, through-holes - are formed in a single dwell cycle. No inter-station handling, no reheat, no scale. The complete metal fiber structure of the raw material remains intact, delivering mechanical properties that machined parts cannot replicate.
Ten new-generation forming lines – capacity and consistency – All ten 6-station platforms are under five years old, with controlled tooling condition and stable precision. High-volume orders run in parallel across multiple cells; maintenance on one unit does not interrupt production. Weekly capacity holds at 420,000+ pieces, supporting seamless scale-up from pilot runs to million-piece production.
Material yield over 95% – Cold heading redistributes material rather than removing it. Scrap is limited to cut-off losses. Compared to CNC turning from solid bar - where material removal can exceed 60% - cold heading delivers substantial material savings at volume, particularly on high-cost materials like copper and stainless steel.
Work-hardened surfaces, as-formed – The cold forming process induces localized strain hardening at critical radii and load-bearing faces. Components emerge with improved surface hardness and fatigue resistance - without requiring downstream heat treatment for base strength. Surface hardness typically reaches HRC22–28 on low-carbon steels and HV300–400 on alloy steels.
Raw material quality control – Cold heading wire/rod stock requires tight surface quality: dimensional tolerance ±0.15mm, out-of-roundness ≤0.10mm, surface crack depth ≤0.07mm. We screen incoming material against these standards to ensure consistent forming results and extended die life.
100% AI visual inspection – Automated vision sorting machines verify every piece for critical dimensions and surface condition. Zero-defect batch release is standard, not aspirational.
IATF 16949-certified facility – Full PPAP Level 3 documentation available - process FMEA, control plans, capability studies - prepared to the same standard we apply to Tier 1 automotive customers. Our material system aligns with YB/T 6106-2023 (wire rods for automotive fasteners).
Quality Control

Applications
Automotive Suspension and Steering Fasteners
Control arm ball studs, steering linkage pins, and suspension mounting bolts are produced through multi-station upsetting and extrusion. The work-hardened surface layer improves fatigue life under cyclic loading. Our cold heading process delivers the combination of high strength, dimensional consistency, and volume output required for chassis and steering systems.
Precision Shafts and Core Pins for Electronics
Printer and copier eccentric shafts, core pins, and guide rods are produced to ±0.02mm tolerance with consistent straightness and surface finish. Cold heading provides a cost-effective alternative to Swiss turning for medium-to-high volume runs, with comparable precision and significantly faster cycle times.
Custom Bushings and Sleeves
Blind-hole and through-hole bushings with stepped O.D. profiles are formed in a single operation. Integrated flanges, locating shoulders, and undercuts are produced as-formed - eliminating secondary machining on these features. Applications span automotive suspension, shock absorber assemblies, and industrial equipment.
Beyond Automotive
|
Sector |
Typical Components |
Key Requirements |
|
Electronics / Office Equipment |
Eccentric shafts, core pins, guide rods |
±0.02mm tolerance, consistent straightness |
|
Power Tools |
Motor shafts, impact driver bits |
Toughness, fatigue strength, high-volume output |
|
Industrial Equipment |
Custom fasteners, bearing sleeves, locating pins |
Strength, corrosion resistance, cost-efficient volume |
|
New Energy |
Battery pack structural components, busbar connectors |
Conductivity, structural strength, automotive-grade documentation |
|
General Fasteners |
Bolts, screws, threaded studs, rivets |
Dimensional consistency, material traceability, volume capability |
Why Cold Heading
Machining is subtractive. Cold heading is transformative. The distinction matters when you are producing components in volume:
Machining – material comes in as bar and chips leave as waste. Sixty percent or more of the starting material can end up on the shop floor. Each operation adds time, handling, and tolerance risk. Good for short runs and design iteration. Bad for cost at scale.
Cold heading – material moves, is displaced, and takes the shape of the cavity. No chips. No waste beyond the cut-off length. Grain flow follows the final contour - meaning the part is stronger where it needs to be. Cycle times measured in seconds, not minutes.
For high-volume runs of fasteners, terminals, shafts, and bushings, cold heading is not a cost-saving alternative. It is the production method. Everything else is just a prototype.
Contact Us for Your New Project
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