KBC 6305DD Deep Groove Ball Bearing 25×62×17mm — Double Rubber Sealed, Single Row, 52100 Steel, Verified Spec
Key Attributes
Product Summary
KBC 6305DD (25×62×17mm) deep groove ball bearing with double contact rubber seals, 52100 chrome steel races, and lithium grease. Handles 11.6kN dynamic load up to 7,500 RPM. Interchangeable with 6305-2RS; KBC Korea quality, verified specs.
Product Details
KBC 6305DD deep groove ball bearing
,double rubber sealed 6305DD bearing
,25×62×17mm single row bearing
The KBC 6305DD is a single-row deep groove ball bearing manufactured by KBC (Korea). With a bore of 25 mm, outer diameter of 62 mm, and width of 17 mm, this is one of the most widely used standard bearing sizes in industrial and automotive applications. The DD suffix denotes double contact rubber seals on both sides, providing protection against dust, dirt, and moisture while retaining lubricant.
How It Works: Deep groove ball bearings support both radial and axial loads in both directions. The deep raceway grooves and precision balls allow smooth rotation with low friction and low noise. The contact rubber seals (DD/2RS) rub against the inner ring to create a barrier, making this bearing suitable for environments where contamination is a concern but extreme speed is not required.
- Verified Dimensions Confirmed: 25 mm bore × 62 mm outer diameter × 17 mm width — consistent across ABF Store, Eastern Industrial Automation, and Zoro listings.
- Verified Load Ratings Confirmed: Static load 22,500 N; Dynamic load 11,600 N — per KBC 6305-DD specification from Eastern Industrial Automation.
- Verified Material & Construction: 52100 chrome steel races; rubber contact seals; sheet steel cage; lithium grease — per KBC specification data.
- Verified Seal Type Confirmed: DD = Contact seal on both sides, equivalent to 2RS designation.
- Verified Weight Recorded: 0.235 kg — per ABF Store KBC 6305DD listing.
- Unverified "EMQ" Claim: No KBC official documentation in available search results confirms that the standard 6305DD is rated as EMQ (Electric Motor Quality). One variant (6305DD C3 G14) references grease suitable for electric motors, but this does not constitute an EMQ rating for the bearing itself. Do not market this as EMQ without supplier certification.
- Note Speed Rating: Eastern lists 7,500 RPM maximum speed for the KBC 6305-DD. This may vary by lubrication and operating conditions.
- Grinding, humming, or whining noise during rotation
- Visible play or looseness when the inner or outer ring is moved
- Rough rotation felt by hand (notchy or binding)
- Grease leakage or hardened/dried lubricant at the seal edges
- Overheating of the bearing housing during operation
| Part Number | 6305DD | Product Name | Deep Groove Ball Bearing |
|---|---|---|---|
| Brand | KBC (Korea) | Condition | 100% Brand New |
| Weight | Standard (0.235 kg) | Origin | China Mainland |
| Main Market | Middle East, Asia, Africa, South America, North America & Europe | ||
| Package | Neutral Packing or As Requested | Warranty | 6 Months |
| Price & Stock | Please contact us for more information | ||
| Material | High-strength aluminum alloy & precision bearings | Cooling Type | Engine coolant circulation |
| Installation | Direct OEM replacement | Quality Standard | OEM equivalent / ISO quality control |
| Feature | Benefit & Verification Signal |
|---|---|
| 25×62×17 mm standard size | Widely available and interchangeable — confirmed across multiple distributor listings. |
| Double contact rubber seals (DD) | Protects against dust, dirt, and moisture — seal type confirmed by ABF and Eastern. |
| 52100 chrome steel races | Provides durability and wear resistance — material specified by KBC distributor. |
| 22.5 kN static / 11.6 kN dynamic load | Suitable for moderate radial and axial loads — load ratings provided by KBC distributor. |
| KBC Korea manufacturing | Brand origin confirmed by Korean distributor listing. |
| Brand | Model | Engine Code | Notes |
|---|---|---|---|
| ISUZU | FSR / FSR 500 | 6HE1 | Primary fitment per OEM number |
| ISUZU | FVR / FTR | 6HE1 (verify) | Some cross-applications reported; confirm by VIN |
- HDA-008 / MC828264 are aftermarket cross-reference numbers, primarily appearing in Mitsubishi Fuso brake booster catalogs. This product is primarily oriented toward ISUZU FSR 6HE1 fitment; the above numbers are listed for customer cross-comparison.
- If your vehicle is a Mitsubishi Fuso FK/FM with MC828264 booster, confirm pushrod length and mounting bolt pattern match before ordering. "Short" vs "long" pushrod variants exist within the MC828264 family.
- Always provide VIN/chassis number for verification. Do not rely solely on cross-reference numbers.
| QC Item | Verification Method |
|---|---|
| Bore diameter (25 mm) | Bore gauge check per batch |
| Outer diameter (62 mm) | Micrometer check per batch |
| Width (17 mm) | Gauge check per batch |
| Seal integrity | Visual inspection for tears or improper seating |
| Rotation noise | Sampled spin test — request supplier noise data if EMQ required |
| Grease condition | Visual check for leakage or dryness |
- Clean the shaft and housing thoroughly. Check for burrs, rust, or damage.
- Verify shaft diameter and housing bore against bearing dimensions (25 mm / 62 mm).
- Apply a thin film of oil to the shaft and housing bore.
- For a press fit, use an arbor press or bearing heater (do not exceed 120°C). Press on the inner ring for shaft fit.
- Install seals or shields if the bearing is not pre-sealed (DD/2RS bearings are pre-sealed).
- Rotate the shaft by hand to check for smooth operation and correct alignment.
- Lubricate only if the bearing is not pre-greased (DD bearings are pre-lubricated with lithium grease).
- Inspect for noise, vibration, and seal condition at every equipment service interval.
- Replace if abnormal noise, play, or grease leakage is detected.
- Do not over-grease sealed bearings.
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