Part number · Deep groove ball bearing
6309 Bearing – Size, Stock & Today’s Price
6309: a 45 × 100 × 25 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)
- 45 mm
- Outside diameter (D)
- 100 mm
- Width (B)
- 25 mm
- Dynamic load rating (C)
- 55.3 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 6309 is a medium-series deep groove ball bearing with a 45 mm bore, a 100 mm outside diameter and a width of 25 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, 09, multiplied by 5 give the 45 mm bore. A full designation such as 6309-2RS-C3 means a 6309 with rubber seals on both sides and C3 internal clearance, the usual choice for electric motors.
Sharing the same 45 mm bore are the 6009 (45 × 75 × 16 mm), the 6209 (45 × 85 × 19 mm), the 6809 (45 × 58 × 7 mm) and the 6909 (45 × 68 × 12 mm). They all fit a 45 mm shaft, but each needs a different housing, so check the outside diameter and width before you order.
Why 6309 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 6309 price on WhatsApp.
6309 dimensions
| Bore (d) | 45 mm |
|---|---|
| Outside diameter (D) | 100 mm |
| Width (B) | 25 mm |
Dimensions are the ISO 15 standard size, the same in every brand and seal type.
6309 load and speed ratings
| Dynamic load rating (C) | 55.3 kN |
|---|---|
| Static load rating (C₀) | 31.5 kN |
| Reference speed | 15,000 r/min |
| Limiting speed | 9,500 r/min |
Figures for the open SKF 6309 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 45 mm shaft
Same bore, different series: a bigger bearing carries more load but needs a bigger housing.
| Bearing | Size (mm) | Dynamic load C |
|---|---|---|
| 6009 | 45 × 75 × 16 | 22.1 kN |
| 6209 | 45 × 85 × 19 | 35.1 kN |
| 6309 | 45 × 100 × 25 | 55.3 kN |
On a 45 mm shaft, the 6309 carries 58% more load than the slimmer 6209.
6309 variants
Every 6309 has the same outside dimensions. What changes is how it is sealed, its internal clearance and its material:
- 6309 (open): no shields or seals. For gearboxes and machines where oil or grease reaches the bearing.
- 6309 ZZ / 2Z: metal shields on both sides, greased for life. For clean, fast-running motors and fans.
- 6309 2RS: rubber seals on both sides (DDU at NSK, LLU at NTN). Better against dust and moisture.
- 6309 C3: internal clearance greater than normal, combined with any of the above (e.g. 6309-2RS-C3). The usual choice for electric motors.
- S6309 / SS6309: stainless steel for wet or corrosive conditions, usually marked with an S or SS prefix (SKF uses W). Supplied on request.
6309 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 | 6309 |
6309-2Z |
6309-2RS1 |
6309-2RS1/C3 |
| FAG | 6309 |
6309-Z |
6309-RSR |
– |
| NTN | 6309 |
6309ZZ |
6309LLU |
6309LLUC3 |
| NSK | 6309 |
6309ZZ |
6309DDU |
6309DDUC3 |
| KOYO | 6309 |
6309ZZ |
6309-2RS |
6309-2RS C3 |
| HCH | 6309 |
6309ZZ |
6309-2RS |
6309-2RS C3 |
Where the 6309 is used
- Large electric motors
- Industrial pumps and compressors
- Gearboxes and reducers
- Conveyor drives
- Machine tools
- Crushers, mixers and process plant
Brands available for 6309
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 6309 genuine?
Counterfeit bearings are sold in many sizes and brands, including the 6309. 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
6309 bearing: frequently asked
What size is a 6309 bearing?
A 6309 measures 45 mm bore × 100 mm outside diameter × 25 mm width. The size is the same in every brand and seal type.
What is the SKF, FAG or NSK equivalent of 6309 2RS C3?
SKF writes it 6309-2RS1/C3, FAG writes the sealed bearing 6309-RSR (ask us for C3) and NSK 6309DDUC3, NTN 6309LLUC3 and KOYO 6309-2RS C3. All are the same 45 × 100 × 25 mm size with rubber seals on both sides and C3 clearance.
Can I use a 6209 instead of a 6309?
Not without changing the housing. Both have a 45 mm bore, but the 6209 is 85 mm across and 19 mm wide, against 100 × 25 mm for the 6309.
What load can a 6309 bearing carry?
SKF rates the open 6309 at a dynamic load rating (C) of 55.3 kN and a static load rating (C0) of 31.5 kN, with a limiting speed of 9,500 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.