Advanced Ultra Precision Five-axis CNC-Machined Bicycle Bottom Bracket System

Advanced Ultra-Precision five-axis CNC-Machined Bicycle Bottom Bracket System

Product Overview:

Crafted through state-of-the-art CNC machining processes, our high-performance bicycle bottom brackets represent the gold standard in drivetrain efficiency and durability. Manufactured in our ISO 9001-certified facility with aerospace-grade precision, these components combine cutting-edge engineering with race-proven reliability to deliver unmatched power transfer across all cycling disciplines. The choice of professional pelotons and performance-focused riders worldwide, each bottom bracket undergoes rigorous quality control to ensure perfect bearing alignment, optimized stiffness-to-weight ratios, and exceptional longevity - whether conquering alpine climbs, technical singletrack, or endurance gravel routes. By integrating premium materials with micron-level machining tolerances, we've created a bottom bracket system that consistently outperforms OEM components while maintaining flawless compatibility with modern frame standards.

Key Technical Features:

Advanced Materials Engineering

Aerospace-grade 7075-T6 aluminum alloy (ultimate tensile strength: 572 MPa)

Optional titanium alloy (Grade 5) for ultra-premium applications

Proprietary heat treatment process enhances fatigue resistance by 40%

Precision CNC Manufacturing

5-axis CNC machining with ±0.01mm tolerance

Micro-finish surface treatment (Ra 0.4μm) for optimal bearing seating

Computer-balanced design eliminates rotational imbalance

Bearing Technology

Japanese-made hybrid ceramic bearings (Si3N4 balls with steel races)

Double-lip contact seals with high-temperature grease

ABEC-7 tolerance rating for smooth operation

Detailed Product Specifications Table

Performance Advantages:

Efficiency Gains

15% lower rolling resistance than OEM bottom brackets

3-5 watt power savings at 90rpm cadence

Break-in period of just 50km (vs 200km for standard BBs)

Durability Features

50,000km rated service life (3x industry average)

Corrosion-resistant anodizing (25μm thickness)

Wear indicators for proactive maintenance

Installation System

Includes proprietary installation tool kit

Torque specification laser-etched on body

Pre-loaded with anti-seize compound

Application Guide:

Road Cycling

Recommended model: ProRoad SL

Benefits: Maximizes power transfer for sprinting/climbing

Compatible with: Carbon fiber and aluminum frames

Mountain Biking

Recommended model: MTB Enduro Pro

Benefits: Mud-shedding design, impact resistance

Compatible with: 29er/27.5" full-suspension bikes

Gravel/Adventure

Recommended model: Gravel Ultimate

Benefits: Vibration damping, all-weather reliability

Compatible with: Frame bags and bikepacking setups

E-Bikes

Recommended model: eBike HD

Benefits: Handles 120Nm motor torque

Compatible with: Class 1-3 e-bike systems

Quality Assurance:

100% dimensional inspection via CMM

Batch testing for bearing smoothness (≤0.5N·m breakaway torque)

Vibration testing to simulate 10,000km of riding

Salt spray testing exceeds 500 hours

Why Consider Us?
No mold fees for aluminum profiles – We absorb these costs to reduce your expenses.
No welding fixture charges – Another way we help you save.
Combing different Producing Technology – Outsource Aluminium Profile, Shaped Metal, Metal Casting materials, MIM materials, then CNC machining to lower the unit price.
Cost-competitive production – Our lean manufacturing and expertise allow us to deliver high-quality parts at favorable prices.
One-Stop Factory – Our ISO9001 IATF16949 Certificated factory provide laser cutting, bending, Stamping, CNC Machining, Sheet Metal Working, welding, Assembling in one factory, ensure stable quality control.

Suzhou Polestar Metal Products Co., Ltd. Your Trusted One-Stop Metal Manufacturing Partner!

At Polestar Metal, we specialize in precision metal fabrication with a comprehensive range of advanced manufacturing capabilities. Equipped with 40+ CNC machining centers (3-axis & 4-axis), Laser cutting, wire cutting equipment, gantry mills, CNC lathes, milling machines, and multi-tasking turn-mill centers, we deliver high-accuracy components tailored to your needs.

Our expertise extends to sheet metal fabrication , including stamping, bending, welding (manual & robotic), sandblasting, and post-processing, ensuring a seamless production process from raw material to finished assembly. Industries We Serve: Industrial Machinery, Communication Equipment, Aerospace & Aviation, Medical & Rehabilitation Devices, Motorcycle & Bicycle Components, Outdoor & Sporting Goods and other areas.

Committed to ISO 9001 quality standards , we utilize state-of-the-art inspection tools to guarantee superior product quality and reliability. Our dedication to customer satisfaction has earned us global recognition , making us a preferred partner for clients worldwide.

Partner with Polestar Metal, Where precision meets excellence! Welcome to contact us with your requirements, and let us provide you with an exceptional custom metalworking experience.