Deep groove ball bearing 6903-2Z – 17×30×7 mm
6 offers · 4 manufacturers · net prices from PLN 17.38 · dispatch in 2 working days
6903-2Z is a deep groove ball bearing with a 17 mm bore, 30 mm outside diameter and 7 mm width, with two metal shields (2Z) – non-contact, for higher speeds. The dimensions are standardised, so items from different manufacturers with the same clearance and sealing are interchangeable 1:1. All brands with current net prices are listed below.
- bore d
- 17 mm
- outside D
- 30 mm
- width B
- 7 mm
- sealing
- 2Z
- net price from
- PLN 17.38
Brands and prices 6903-2Z
Net price per piece, gross incl. 23% VAT. Selected items go into one enquiry – we reply within 24 h, with better prices for larger quantities.
| Brand | Manufacturer designation | Clearance | Net price | Availability | |
|---|---|---|---|---|---|
| NACHI | 6903 ZZECMEC design, machined brass cage (SKF) | CN | PLN 17.38PLN 21.38 gross | supplier stockdispatch in 2 working days | |
| NTN | 6903 JRXZZ/2ASriveted pressed steel cage (FAG) | CN | PLN 20.36PLN 25.04 gross | supplier stockdispatch in 2 working days | |
| KOYO | 6903 ZZC3 | C3 | PLN 24.46PLN 30.09 gross | supplier stockdispatch in 2 working days | |
| KOYO | 6903 ZZ | CN | PLN 24.46PLN 30.09 gross | supplier stockdispatch in 2 working days | |
| NSK | 6903-ZZ | CN | PLN 25.93PLN 31.89 gross | supplier stockdispatch in 2 working days | |
| NSK | 6903-ZZC3 | C3 | PLN 25.93PLN 31.89 gross | supplier stockdispatch in 2 working days |
Can't see your brand? Ask for an offer – we reply within 24 h.
Other versions of 6903
The same size in another design – open, shielded, tapered bore.
How manufacturers designate 6903-2Z
Each brand uses its own seal and design codes. The designations below describe the same bearing.
| Manufacturer | Designation | Sealing / design |
|---|---|---|
| KOYO | 6903 ZZC3 | 2Z – metal shields, both sides |
| NSK | 6903-ZZ | 2Z – metal shields, both sides |
| NACHI | 6903 ZZECM | 2Z – metal shields, both sides |
| NTN | 6903 JRXZZ/2AS | 2Z – metal shields, both sides |
2RS, 2Z or C3 – which to choose?
2RS (two rubber seals) keeps dust and moisture out but limits speed. 2Z (metal shields) does not touch the ring, so it runs faster and cooler but protects less. 2RZ is the compromise – a non-contact seal.
Choose C3 clearance when the bearing runs hot (electric motors, fans) or with a tight shaft fit. Normal clearance CN is enough for ordinary applications.
The dimensions of 6903-2Z are identical for every manufacturer, so the items in the table are interchangeable – just match the clearance and sealing.
Questions about 6903-2Z
What are the dimensions of bearing 6903-2Z?
Bore 17 mm, outside diameter 30 mm, width 7 mm. Standardised dimensions – the same for every manufacturer.
Are 6903-2Z bearings from different brands interchangeable?
Yes. 6903 ZZC3 KOYO, 6903-ZZ NSK, 6903 ZZECM NACHI, 6903 JRXZZ/2AS NTN are the same bearing under different manufacturers' designations. Match the clearance (e.g. C3) and the sealing.
How much does bearing 6903-2Z cost?
At Castomer from PLN 17.38 to PLN 25.93 net per piece depending on the manufacturer (KOYO, NSK, NACHI, NTN). Prices are updated from supplier warehouses; larger quantities get an individual offer.
What is the delivery time for 6903-2Z?
Dispatch in 2 working days from supplier warehouses in the EU. Availability is confirmed in the reply to your enquiry.
