617/4 674 Minature Deep Groove Ball Bearings 4mm X 7mm X 2 mm Thin
Section Robot Bearings Open Type
The 674 miniature deep groove ball bearing, with dimensions of 4mm
inner diameter × 7mm outer diameter × 2 mm width, is renowned for
its compact size, high-speed capability, and low noise
characteristics.
Bearing Number | Boundary Dimensions(mm) | Basic Load Rating(N) | Limiting Speed(rpm) | Reference(kg)
Weight |
| Inner Diameter | Outer Diameter | Width | Chamfer | Dynamic | Static | Grease | Oil |
| d | D | B | B1 | r(min) | Cr | Cor | Non-contact | Wt ≈ |
| 617/3 | ZZ | | 3 | 6 | 2 | 2.5 | 0.1 | 242 | 94 | 60000 | 71000 | 0.00020 |
| 617/4 | ZZ | | 4 | 7 | 2 | 2.5 | 0.1 | 222 | 88 | 54000 | 63000 | 0.00028 |
| 617/5 | ZZ | | 5 | 8 | 2 | 2.5 | 0.1 | 217 | 91 | 49000 | 57000 | 0.00032 |
| 617/6 | ZZ | | 6 | 10 | 2.5 | 3 | 0.1 | 465 | 196 | 43000 | 51000 | 0.00065 |
| 617/7 | ZZ | | 7 | 11 | 2.5 | 3 | 0.1 | 555 | 269 | 40000 | 47000 | 0.00067 |
| 617/8 | ZZ | | 8 | 12 | 2.5 | 3.5 | 0.1 | 515 | 252 | 38000 | 45000 | 0.00075 |
| 617/9 | ZZ | | 9 | 14 | 3 | 4.5 | 0.1 | 920 | 465 | 36000 | 42000 | 0.00140 |
674 Ball Bearings 4X7X2 mm Specifications & Dimensions
| Universal | 674 |
| Type | Deep Groove Ball |
| Inner/Outer Ring/ Ball Material | Chrome Steel |
| Cage Material | Steel/Nylon |
| CageType | Punching |
| Precision | P0,P6 |
| Inner Dimension d(Ø)(mm) | 4 |
| Outer Dimension D(Ø)(mm) | 7 |
| Width B (or T)(mm) | 2 |
| Lubrication | Oil or Grease |
| Load Direction | Radial |
| Specifications/Environment | Standard |
| Number of Raceway Ring Rows | Single Track |
| Size Standards | Metric Series |
The 674 miniature deep groove ball bearing is widely used across
various specialized fields due to its compact size and high
precision. Application areas include:
1. Consumer Electronics and Office Equipment:
Printers/Fax Machines: Acts as a precision transmission component, supporting high-speed
and low-noise operation.
Micro Motors: Including motors in drones and hard drives, utilizing its
high-speed rotation and low friction characteristics.
2. Precision Instruments and Industrial Equipment:
Testing Equipment: Such as centrifuges and optical instruments, relying on its high
precision and stability.
Automation Equipment: Applied in robotic joints and precision transmission systems of
3D printers.
3. Automotive and Transportation:
Automotive Motors: Like fan motors and turbochargers, meeting requirements for heat
resistance and long service life.
Reduction Gears: Achieving efficient power transmission in vehicle-mounted
devices.
This bearing type offers versatile solutions across a broad range
of demanding applications, ensuring reliability, precision, and
efficiency in everything from consumer electronics to specialized
medical and model equipment.
