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Cold Forged Brass Terminal Fitting with CNC Post-Machined Precision for High Conductivity Power Connectors

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Cold Forged Brass Terminal Fitting with CNC Post-Machined Precision for High Conductivity Power Connectors

Detail Information

Product Description

Detail Information

Material Options:

Brass C36000, Brass C37700, Brass CZ121, Custom Brass Alloys

Conductivity:

25-28% IACS (C36000), Higher For Custom High-conductivity Alloys

Tolerance:

+/-0.05mm (as-forged), +/-0.01mm (CNC Post-machined Features)

Surface Treatment:

Nickel Plating, Tin Plating, Silver Plating, Passivation

Lead Time:

5-10 Days (CNC Prototype), 15-25 Days (production)

Minimum Order Quantity:

100 Pieces (CNC), 5,000+ (cold Forged)

Product Description

Cold Forged Brass Electrical Terminal Fitting - Custom Power Connector Components

Cold forging brass is one of those processes that looks too good to be true until you see it in person. You take a brass slug, slam it into a die at room temperature with several thousand tons of force, and out comes a near-net-shape terminal fitting with a grain structure that follows the part's contour. No cutting, no chip waste, no interrupted grain flow. The result is a part that's mechanically stronger than an equivalent CNC machined component - and at volume, significantly cheaper.

The catch is the tooling. Cold forging dies are expensive and the design iteration cycle is longer than CNC. If you need 50 pieces, CNC machining is the obvious choice. If you need 50,000 pieces, cold forging starts to look very attractive - the per-piece cost drops dramatically once the dies are paid for.

We handle both ends of that spectrum. Sinbo Precision provides cold forged brass terminal fittings for high-volume production runs, with CNC post-machining for precision features like threaded holes, pin contacts, or flat mating surfaces that forging alone can't achieve to the required tolerance. This hybrid approach - forge the bulk shape, machine the critical features - gives you the strength and cost advantage of forging with the precision of CNC where it actually matters.

Our cold forged terminal fittings are used in automotive wiring harnesses, power distribution blocks, battery terminal connectors, circuit breaker components, and industrial power supply units. We work with C36000 free-cutting brass, C37700 forging brass, and custom alloys depending on the conductivity and strength requirements. Surface treatments include nickel plating, tin plating, and silver plating depending on the application's electrical and environmental demands.

Key Features

Superior Grain Structure: Cold forging aligns the metal's grain flow with the part's contour, producing a terminal fitting that's 20-30% stronger in fatigue than a machined equivalent from bar stock.
Near-Net-Shape Efficiency: Forging produces the bulk geometry with minimal material waste. CNC post-machining only removes material where tight tolerances are required, reducing both cycle time and raw material cost.
High-Volume Cost Advantage: Once dies are tooled, per-piece cost at 10,000+ quantities is typically 30-50% lower than full CNC machining. The economics improve as volume increases.
Hybrid Forging + CNC: Complex terminal geometries are forged for strength and cost, then precision CNC machined for threaded holes, contact features, and mating surfaces to +/-0.01mm.
Full Plating Support: Nickel, tin, and silver plating through certified suppliers with thickness documentation, adhesion testing, and RoHS/REACH compliance.

Technical Specifications

Specification	Details
Product Name	Cold Forged Brass Electrical Terminal Fitting
Material Options	Brass C36000, Brass C37700, Brass CZ121, Custom Brass Alloys
Conductivity	25-28% IACS (C36000), higher for custom high-conductivity alloys
Tolerance	+/-0.05mm (as-forged), +/-0.01mm (CNC post-machined features)
Surface Treatment	Nickel Plating, Tin Plating, Silver Plating, Passivation
Certifications	ISO 9001:2015, IATF 16949, RoHS, CE, REACH
Lead Time - Prototype	5-10 days (CNC machined prototype from bar stock)
Lead Time - Production	15-25 days (includes die fabrication)
MOQ	100 pieces (CNC), 5,000+ (cold forged production)
Origin	Dongguan, China

Applications

Automotive Wiring: Battery terminal connectors, wiring harness junction fittings, fuse box terminal blocks, ground lug fittings for automotive electrical systems
Power Distribution: Circuit breaker terminal fittings, busbar connection terminals, power distribution block connectors, load center wiring terminals
Battery Systems: Battery terminal connectors for energy storage, EV battery pack terminals, UPS battery terminal fittings, telecom backup battery connectors
Industrial Controls: Motor starter terminal fittings, contactor terminal blocks, PLC I/O terminal connectors, industrial control panel wiring components
Consumer Electronics: Power supply terminal fittings, charger port connectors, audio equipment terminal posts, home appliance power connectors
Renewable Energy: Solar inverter terminal connectors, wind turbine power terminals, EV charging station power fittings, battery combiner box terminals

Why Choose Sinbo Precision

Forging + CNC Under One Roof: Most shops do one or the other. We forge the bulk shape and post-machine the precision features in the same facility, eliminating logistics complexity and quality handoff risk.
Die Design Expertise: Our engineering team has designed cold forging dies for hundreds of terminal fitting geometries. We run FEA simulations to optimize material flow before cutting steel, reducing die development iterations.
Prototype Through Production: Start with CNC machined prototypes from bar stock (fast, low volume), validate the design, then transition to cold forged production (stronger, cheaper at volume) without changing suppliers.
IATF 16949 Certified: Automotive-grade quality system with PPAP documentation, control plans, and SPC process control for production runs.
Volume Pricing That Scales: Per-piece cost decreases significantly at 10K, 50K, and 100K+ quantities. We'll give you honest break-even analysis between CNC and forging for your specific volume.
Full Traceability: Material test certificates, plating reports, dimensional inspection data, and RoHS/REACH compliance documentation with every shipment.

Manufacturing Process

Design & Feasibility: Part geometry review for forgeability analysis, grain flow optimization, CNC post-machining requirement identification, and cost comparison between full CNC and hybrid forging+CNC.
Prototype (CNC): CNC machined prototypes from brass bar stock for design validation. Fast turnaround (5-10 days) without waiting for die fabrication.
Die Fabrication: Precision die design and manufacture using wire EDM and CNC machining. FEA-verified material flow simulation before first production hit.
Cold Forging: Multi-station cold forging with progressive dies to form near-net-shape terminal geometry. In-process dimensional checks at each station.
CNC Post-Machining: Precision machining of threaded holes, contact features, mating surfaces, and any features requiring tighter than +/-0.05mm tolerance.
Plating & Inspection: Nickel/tin/silver plating, dimensional verification, conductivity testing, plating thickness measurement, packaging, and shipment.

FAQ

Q: What is your minimum order quantity?

A: For CNC machined prototypes, 100 pieces. For cold forged production, 5,000 pieces minimum to justify die cost. We'll help you determine the break-even point.

Q: How does cold forging compare to CNC machining on cost?

A: At volumes under 5,000 pieces, CNC is usually cheaper due to no tooling investment. Above 10,000 pieces, cold forging is typically 30-50% less expensive per piece. We'll run the numbers for your specific geometry and quantity.

Q: Can you make prototypes before committing to forging dies?

A: Yes. We CNC machine prototypes from bar stock that replicate the final forged geometry. You validate the design, then we build the forging dies for production.

Q: What tolerances can cold forging achieve?

A: As-forged tolerances are typically +/-0.05mm. For tighter tolerances, we CNC post-machine those specific features to +/-0.01mm or better.

Q: Do you provide IATF 16949 documentation?

A: Yes. PPAP, control plans, PFMEA, SPC data, and full material traceability for automotive production qualification.

Q: What is the typical lead time for forged production?

A: Die fabrication: 10-15 days. First article production: 5-10 days after die approval. Ongoing production: 15-25 days depending on quantity and plating requirements.

Tags:

Sinbo Precision Mechanical Co., Ltd.

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products details

CNC Mechanical Parts

CNC Turning Parts

CNC Milling Parts

CNC Machining Services

Cold Forging Parts

CNC Turning Milling Parts

CNC Aluminum Parts

CNC Stainless Steel Parts

CNC Brass Parts

CNC Stamping Parts

Machining Plastic Parts

Bending Sheet Metal Parts

New Energy Auto Parts

Energy Storage Connectors

Contactor Terminal

Battery Terminal Connector

CNC Manufacturing Solutions

Cold Forged Brass Terminal Fitting with CNC Post-Machined Precision for High Conductivity Power Connectors