Deep Groove Ball Bearing
R series inch size R4ZZ mini bearing 6.35x15.875x4.978mm, chrome steel, low noise. samples are available.
Model number: inch size deep groove ball bearing R4 R4ZZ R4-2RS
Size: 6.35*15.875*4.978mm/0.25*0.625*0.196 inch
Material: Gcr15 chrome steel
weight: 0.008KG
MOQ: 100 PCS
Lead time:3-5 days
Specification
Inch Size R4ZZ R4 Miniature Deep Groove Ball Bearing, manufactured from chrome steel, features dual-sided metal seals (ZZ) and is pre-lubricated. It offers a compact design, smooth operation, low noise, and wear resistance, making it suitable for small, high-precision equipment such as power tools, robots, and precision instruments.
Technical parameter:
| Model Number | inch size deep groove ball bearing R4 R4ZZ R4-2RS |
| Size | 6.35*15.875*4.978mm/0.25*0.625*0.196 inch |
| Weight | 0.008 KG |
| Material | Gcr15 chrome steel |
| Clearance | C2 C0 C3 C4 |
| Precision Grade | p0 |
| Dynamic Load Rating | 2.41 lbf |
| Static Load Rating | 0.911 lbf |
| Max Speed (Grease Lubrication) | 48000 RPM |
| Shield Type | ZZ |
| Lubrication | Pre-lubricated with High-Performance Grease |
| Temperature Range | -20°C to +120°C |
| Lead Time | 3-5 Days |
Structural Features of R4ZZ R4 Miniature Deep Groove Ball Bearings primarily revolve around material composition, sealing, and core design, as detailed below:
Highly Adaptable Material Structure: Constructed entirely from chrome steel, it offers high hardness and exceptional wear resistance, meeting the fundamental requirements for bearing strength and service life in compact equipment.
Dual-Side Metal Seal Structure: Equipped with ZZ-type dual-side metal seals, these bearings offer stable sealing performance. They effectively block dust and contaminants from entering the bearing interior while minimizing internal grease loss, thereby extending maintenance intervals.
Compact Deep-Groove Design: Adopts the standard structure of miniature deep-groove ball bearings. The raceway and balls exhibit high matching precision, enabling the bearing to handle radial loads and a small amount of bidirectional axial loads. Its compact overall size makes it suitable for the limited installation space of small equipment.
Related Products
| Model No. | d | D | H | m |
| R155 | 3.97 mm | 7.94 mm | 2.78 mm | 0.55 g |
| R155ZZ | 3.97 mm | 7.94 mm | 3.18 mm | 0.55 g |
| R156 | 4.76 mm | 7.94 mm | 2.78 mm | 0.45 g |
| R156ZZ | 4.76 mm | 7.94 mm | 3.18 mm | 0.45 g |
| R166 | 4.76 mm | 9.52 mm | 3.18 mm | 0.8 g |
| R3ZZ | 4.76 mm | 12.7 mm | 4.98 mm | 2.27 g |
| R3 | 4.76 mm | 12.7 mm | 3.97 mm | 2.27 g |
| R186 | 4.76 mm | 12.7 mm | 2.78 mm | 2 g |
| R186ZZ | 4.76 mm | 12.7 mm | 3.97 mm | 2 g |
| R3A | 4.76 mm | 15.88 mm | 4.98 mm | 475 g |
| R3AZZ | 4.76 mm | 15.88 mm | 4.98mm | 5.08 g |
| R168 | 6.35 mm | 9.52 mm | 3.18 mm | 0.6 g |
| R188 | 6.35 mm | 12.7 mm | 3.18 mm | 2 g |
| R188ZZ | 6.35 mm | 12.7 mm | 4.76 mm | 2 g |
| R4 | 6.35 mm | 15.88 mm | 4.98 mm | 4.54 g |
| R4A-ZZ | 6.35 mm | 19.05 mm | 7.14 mm | 7.7 g |
| R4A | 6.35 mm | 19.05 mm | 5.56 mm | 7.7 g |
| R1810 | 7.94 mm | 12.7 mm | 3.97 mm | 1.7 g |
| R6 | 9.52 mm | 22.22 mm | 5.56 mm | 10.88 g |
| R6ZZ | 9.52 mm | 22.22 mm | 7.14 mm | 10.88 g |
Main uses
It is suitable for all kinds of industrial equipment, small rotary motor and other high speed and low noise fields, such as: office equipment, micro motor, instrumentation, laser engraving, small clock, soft drive, pressure rotor, dental drill, hard disk motor, stepper motor, video recorder magnetic drum, toy model, computer cooling fan, money counter, fax machine and other related fields.
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