ISK Bearings | B2B Bearing Wholesale
Ball Bearing 608 |
|
|---|---|
| Type | Ball |
| Material, bearing | Bearing Steel |
| Bore diameter(d) | 8 mm |
| Outside diameter(D) | 22 mm |
| Width(B) | 7 mm |
| Cr (kgf) | 335 kgf |
| Cor (kgf) | 140 kgf |
| Cage | Steel / Nylon |
| Number of Raceway Ring Rows | Single Row |
| Size Standards | Metric |
* ISK bearing precision conforms to internationally recognized standards: ABEC、ISO 492, DIN 620, and JIS B1514.
Provides the inner raceway, fits onto the shaft and rotates with it.
Acts as the stationary raceway, completes the race circuit and is fixed in the housing.
These small, spherical rolling elements reduce friction and support the load.
Maintains ball spacing, prevents ball-to-ball contact, and minimizes friction.
Material Summary: Inner and outer rings are typically bearing steel, balls are steel, and cages may be steel or nylon depending on speed and environmental requirements.
The 608 bearing comes in three main sealing configurations: OPEN, ZZ, and 2RS.
608 OPEN, 608 ZZ, and 608 2RS offer different levels of protection to suit your application environment and performance needs.
No shields or seals — internal components are exposed.Offers the lowest friction for clean environments, but is more suitable for lower‑speed applications and requires frequent cleaning and lubrication.
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Metal shields on both sides effectively block dust and contaminants while retaining lubrication. Suitable for moderately clean environments requiring protection with lower friction.
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Rubber seals on both sides provide superior protection against moisture, dust, and contaminants. Ideal for harsh environments with dust, oil mist, or water exposure. Slightly higher friction but significantly extended service life.
The primary difference lies in sealing effectiveness and friction:
Choose based on your operating environment and maintenance preferences. For challenging conditions, 608 2RS offers better protection; for speed-critical clean applications, 608ZZ is preferred.
608 bearings feature a deep groove design that allows balls to move smoothly, minimizing friction and heat generation — essential for maintaining speed and efficiency.
608 bearings handle both radial loads and moderate axial loads, making them versatile for wheels, pulleys, and multi-directional load applications.
The simple, standardized structure of 608 bearings ensures global availability, easy sourcing, and reduced inventory and maintenance costs.
Installed in wheel hubs, 608 bearings provide smooth, low-friction rolling for speed and stability.
Used in electric motors, fans, and home appliances to support rotor shafts, reduce friction, and extend motor life.
Found in drills, grinders, and sanders, 608 bearings withstand high speeds and continuous operation while minimizing heat and friction.
In material handling and conveyor systems, 608 bearings support rollers and pulleys, ensuring smooth goods movement in warehouses and factories.
Used in specific bicycle frames and linkage points, 608 bearings enhance smoothness and comfort during cycling.
608 bearings are essential across industries requiring smooth rotation, low friction, and high reliability — from skateboarding to industrial automation.
* ISK bearing precision conforms to internationally recognized standards: ABEC、ISO 492, DIN 620, and JIS B1514.
| Model | Bore (mm) | Outer (mm) | Width (mm) | Typical Use |
|---|---|---|---|---|
| 607 | 7 | 19 | 6 | Smaller than 608, ideal for compact structures and smaller shafts. |
| 608 | 8 | 22 | 7 | Most common small deep groove ball bearing — widely used. |
| 609 | 9 | 24 | 7 | Larger bore, suitable for 9 mm shafts and slightly larger equipment. |
Further reading:
Miniature Bearing Size Chart: A Comprehensive Guide to Miniature Ball Bearings
A 608 bearing has standard dimensions of 8 mm inner diameter, 22 mm outer diameter, and 7 mm width.
"6" denotes the deep groove ball bearing series, and "08" represents the 8 mm bore diameter code. Therefore, 608 = an 8×22×7 mm deep groove ball bearing.
608ZZ features metal shields with lower friction, suitable for clean environments. 608-2RS has rubber seals providing superior dust and moisture protection, ideal for harsher or wetter conditions.
Skateboard and inline skate wheels, small motors and fans, handheld power tools, conveyor systems, and certain bicycle frames and sports equipment.
For clean environments prioritizing efficiency, choose OPEN or 608ZZ. For dusty or wet conditions where longevity is key, select 608-2RS.
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