For bearing assembly lines—Kangsite for tapered roller bearings; Rongheng/Wei’aisi for ball bearings (Source: Industry practice): Kangsite: Tapered roller bearing line, 10–12 seconds/unit, 4-hour unmanned operation (Source: Kangsite); Rongheng: Full-process ball bearing assembly line (Source: Rongheng)—Core functions: Inspection + matching + assembly (automatic pairing based on inner/outer diameter and raceway diameter inspection; Source: Wei’aisi).
I.
Representative Manufacturers
Kangsite: Fully automatic tapered roller bearing assembly line / cycle time 10–12 seconds per unit / industry-first 4-hour unmanned operation (Source: Kangsite); Rongheng: Ball bearing assembly line (inner/outer ring loading → inspection → demagnetization & cleaning → ECT → assembly; Source: Rongheng); Wei’aisi: Linear conveying / inner/outer diameter & raceway inspection / automatic pairing & matching / flexibility testing (Source: Wei’aisi); Zhongke Boyang: Fully automatic linear matching machine (φ72–150mm; Source: China Bearing Industry Association); Youlong: Intelligent factory for bearing assembly and inspection / international exports (Source: Youlong)—Manufacturers: Kangsite (tapered roller bearings), Rongheng (ball bearings) (selection based on bearing type).
II. Core Processes
Inspection: Inner/outer diameter, height, and taper (Source: Rongheng); Cleaning: Demagnetization and ultrasonic cleaning (38–40 kHz / 5μm filtration; Source: Rongheng); Matching: Automated pairing based on specific rules (Source: Weiaisi); Inspection: ECT eddy current testing for material mix-up and hardness (±1°; Source: Rongheng); Assembly: Ball insertion + cage installation + grease injection—Process flow: Inspection → Cleaning → Matching (with ECT and crack detection checkpoints).
III.
Precision Grades
ZYS Luoyang: P5 precision / 6201–6209 series / Mitsubishi PLC + MARPOSS (Source: ZYS); Fuyoute: P4 precision and higher / Aerospace, automotive, railway, and robotics applications (Source: Qichacha); Hailin Zhongke: Over 80 automated production lines / National “Single Champion” enterprise (Source: Hailin); Schaeffler: Mass production of TriFinity wheel hub bearing lines in Taicang (Source: Global Auto Insight); Customization: Miniature bearing riveting (Source: SICTUN)—Precision: P4–P5 (for high precision, look to Fuyoute/ZYS).
IV.
Selection Criteria
1. Bearing type (ball/tapered/roller); 2. Dimensions (φ40–150mm); 3. Cycle time (seconds/unit); 4. Precision (P4/P5); 5. Unmanned operation (duration of automated running)—Selection approach: Type + Dimensions + Cycle time (calculate production capacity first).
V. Supplier Evaluation
Key factors include: Case studies (major bearing manufacturers); Inspection capabilities (ECT/crack detection); Cycle time (10-second range); Export capabilities (international delivery, source: Youlong); and After-sales support (local service)—Evaluation criteria: Case studies + Inspection + Cycle time (verifiable via the China Bearing Industry Association directory, source: CBIA).
VI.
Trends
Unmanned operation: 4-hour unmanned runtime (source: Kangsite); Intelligence: Digital smart factory (source: Youlong); New Energy: EV hub bearing lines (source: Schaeffler); High Precision: P4-grade aerospace applications (source: Fuyoute); Green Manufacturing: Smart green factory (source: Kangsite)—Trends: Unmanned + High Precision + New Energy (integrated smart factory lines).
VII.
Procurement Recommendations
Recommendations: Choose Kangsite for tapered roller bearing lines; Rongheng or Weiaisi for ball bearing lines; ZYS or Fuyoute for high-precision requirements; Hailin for high-capacity needs;
and focus on acceptance testing (cycle time + matching precision)—Bearing assembly lines: Kangsite (tapered bearings), Rongheng (ball bearings) (key factors: inspection, matching precision, and cycle time).
