16004-ZZ Narrow-Width Deep Groove Ball Bearing | 20×42×8 mm for Gearboxes & Electric Motors

• Rotors and stators in high-efficiency AC/DC motors
  
• Industrial servo motors and stepping drives
  
• Heavy-duty alternator systems
  
• Cooling fans for commercial HVAC units

• Narrow-profile gear assemblies and speed reducers
  
• Precision industrial clutches and couplings
  
• Conveyor belt drive rollers and pulleys
  
• Agricultural machinery power take-offs (PTO)

• High-speed spinning machines and automated looms
  
• Commercial packaging and wrapping equipment
  
• Food processing machinery (dry environments)
  
• Printing press cylinder supports

• Lightweight portable grinders and circular saws
  
• Small-scale centrifugal fluid pumps
  
• Handheld pneumatic tooling
  
• Engine accessory drives

01. Space-Saving Narrow Geometry

Featuring a streamlined 8mm axial width, the 20x42x8mm footprint allows design engineers to utilize more compact housings without sacrificing critical shaft support. Despite its slimmer profile compared to standard 6004 bearings, the optimized deep-groove geometry easily accommodates continuous radial loads and moderate bilateral axial forces.

02. Low-Friction Shielding for Efficiency

By utilizing dual pressed-steel shields (ZZ), this bearing provides a robust physical barrier against solid particulate ingress without the mechanical drag of rubber seals. This ensures reduced startup resistance and optimal thermal management, improving the overall energy efficiency of high-speed motors and gearboxes.

03. Premium Chrome Steel Construction

Forged from high-purity GCr15 chrome steel, the bearing rings and balls are subjected to advanced heat treatment processes for superior wear resistance and extended fatigue life. Factory pre-greased under strict clean-room conditions, these bearings offer immediate, whisper-quiet operation upon installation.

Interchange Part Numbers

Directly replaces the following equivalent manufacturer parts:

• NSK: 16004ZZ
• SKF: 16004-2Z
• KOYO: 16004ZZ
• NTN: 16004ZZ
• Nachi: 16004ZZE
• FAG: 16004-2Z

Design & Configuration

As a standard offering from Welink Bearing, the 16004-ZZ comes pre-lubricated with a high-performance, low-noise grease formulated for extended industrial lifespans. For specialized operating environments, we can manufacture this bearing with a C3 radial internal clearance to accommodate thermal expansion, or upgrade to stainless steel materials for applications prone to oxidation. If your machinery is exposed to heavy moisture or severe dust, inquire about our fully sealed 16004-2RS alternatives.

"Striking the ideal balance between compact axial dimensions and reliable load-bearing capacity, the 16004-ZZ enhances the efficiency of modern power transmission systems."