Part number · Deep groove ball bearing
6306 Bearing – Size, Stock & Today’s Price
6306: a 30 × 72 × 19 mm deep groove ball bearing. Genuine SKF, FAG, NTN, NSK, KOYO and HCH, supplied across India with same or next-day delivery in Mumbai.
Deep groove ball bearing
- Bore (d)
- 30 mm
- Outside diameter (D)
- 72 mm
- Width (B)
- 19 mm
- Dynamic load rating (C)
- 29.6 kN
Available – ask for stock · Multiple brands
Prices change with brand, variant and quantity, so we quote today’s rate and reply during working hours.
The 6306 is a medium-series deep groove ball bearing with a 30 mm bore, a 72 mm outside diameter and a width of 19 mm. The 63 series is the heavy-duty choice for a given shaft: larger balls, a bigger outside diameter and more width than the 62, for higher loads and shock.
Its last two digits, 06, multiplied by 5 give the 30 mm bore. A full designation such as 6306-2RS-C3 means a 6306 with rubber seals on both sides and C3 internal clearance, the usual choice for electric motors.
Sharing the same 30 mm bore are the 6006 (30 × 55 × 13 mm), the 6206 (30 × 62 × 16 mm), the 6806 (30 × 42 × 7 mm) and the 6906 (30 × 47 × 9 mm). They all fit a 30 mm shaft, but each needs a different housing, so check the outside diameter and width before you order.
Why 6306 prices vary
- Genuine or copy: fakes sell far below the real price and fail early. We sell only genuine bearings.
- Brand and origin: each maker, and each country of manufacture, is priced differently.
- Version: sealed, shielded, C3, stainless and low-noise versions cost more than the open bearing.
- Quantity: bulk and repeat orders are priced lower.
So we quote today’s price for each brand rather than list one number. Ask for the 6306 price on WhatsApp.
6306 dimensions
| Bore (d) | 30 mm |
|---|---|
| Outside diameter (D) | 72 mm |
| Width (B) | 19 mm |
Dimensions are the ISO 15 standard size, the same in every brand and seal type.
6306 load and speed ratings
| Dynamic load rating (C) | 29.6 kN |
|---|---|
| Static load rating (C₀) | 16 kN |
| Reference speed | 20,000 r/min |
| Limiting speed | 13,000 r/min |
Figures for the open SKF 6306 from SKF’s online catalogue (checked 9 Oct 2026). Other brands publish slightly different ratings for the same size. Sealed (2RS) versions have a lower limiting speed. SKF data sheet.
Other bearings for a 30 mm shaft
Same bore, different series: a bigger bearing carries more load but needs a bigger housing.
| Bearing | Size (mm) | Dynamic load C |
|---|---|---|
| 6906 | 30 × 47 × 9 | 7.28 kN |
| 6006 | 30 × 55 × 13 | 13.8 kN |
| 6206 | 30 × 62 × 16 | 20.3 kN |
| 6306 | 30 × 72 × 19 | 29.6 kN |
On a 30 mm shaft, the 6306 carries 46% more load than the slimmer 6206.
6306 variants
Every 6306 has the same outside dimensions. What changes is how it is sealed, its internal clearance and its material:
- 6306 (open): no shields or seals. For gearboxes and machines where oil or grease reaches the bearing.
- 6306 ZZ / 2Z: metal shields on both sides, greased for life. For clean, fast-running motors and fans.
- 6306 2RS: rubber seals on both sides (DDU at NSK, LLU at NTN). Better against dust and moisture.
- 6306 C3: internal clearance greater than normal, combined with any of the above (e.g. 6306-2RS-C3). The usual choice for electric motors.
- S6306 / SS6306: stainless steel for wet or corrosive conditions, usually marked with an S or SS prefix (SKF uses W). Supplied on request.
6306 equivalents by brand
Same size, written in each maker’s own style. Tap a brand to see how it numbers its bearings.
| Brand | Open | Shields | Seals | Seals + C3 |
|---|---|---|---|---|
| SKF | 6306 |
6306-2Z |
6306-2RS1 |
6306-2RS1/C3 |
| FAG | 6306 |
6306-2Z |
6306-2RSR |
6306-2RSR-C3 |
| NTN | 6306 |
6306ZZ |
6306LLU |
6306LLUC3 |
| NSK | 6306 |
6306ZZ |
6306DDU |
6306DDUC3 |
| KOYO | 6306 |
6306ZZ |
6306-2RS |
6306-2RS C3 |
| HCH | 6306 |
6306ZZ |
6306-2RS |
6306-2RS C3 |
Where the 6306 is used
- Electric motors
- Centrifugal and monoblock pumps
- Gearboxes
- Conveyor rollers and pulleys
- Agricultural machinery
- Textile machinery
Brands available for 6306
Buying for a factory or workshop?
- GST invoice with every order
- One quotation for your whole list
- No minimum order
- Same or next-day delivery in Mumbai; dispatch across India
Is your 6306 genuine?
Counterfeit bearings are sold in many sizes and brands, including the 6306. Check that the marking on the ring matches the box exactly, that the brand’s own suffix style is used, and be wary of prices far below the market. How to spot a fake bearing.
Updated
Questions
6306 bearing: frequently asked
What size is a 6306 bearing?
A 6306 measures 30 mm bore × 72 mm outside diameter × 19 mm width. The size is the same in every brand and seal type.
What is the SKF, FAG or NSK equivalent of 6306 2RS C3?
SKF writes it 6306-2RS1/C3, FAG writes it 6306-2RSR-C3 and NSK 6306DDUC3, NTN 6306LLUC3 and KOYO 6306-2RS C3. All are the same 30 × 72 × 19 mm size with rubber seals on both sides and C3 clearance.
Can I use a 6206 instead of a 6306?
Not without changing the housing. Both have a 30 mm bore, but the 6206 is 62 mm across and 16 mm wide, against 72 × 19 mm for the 6306.
What load can a 6306 bearing carry?
SKF rates the open 6306 at a dynamic load rating (C) of 29.6 kN and a static load rating (C0) of 16 kN, with a limiting speed of 13,000 r/min. Other brands publish similar figures. How much load it can carry in service also depends on speed, lubrication and the life you need.
Have a part number, or just a worn-out bearing?
Send it to us. We will tell you what it is, what it costs, and how soon it can be at your door.