Deep groove ball bearing 6311-2Z – 55×120×29 mm

16 offers · 8 manufacturers · net prices from PLN 59.89 · dispatch in 2 working days

6311-2Z is a deep groove ball bearing with a 55 mm bore, 120 mm outside diameter and 29 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: 55 mm
outside D: 120 mm
width B: 29 mm
sealing: 2Z
mass: 1.38 kg
net price from: PLN 59.89

Dimension drawing 6311-2Z – one for all brands (ISO dimensions)

Main dimensions
d – bore diameter	55 mm
D – outside diameter	120 mm
B – width	29 mm
dynamic load rating C	74.1 kN (per SKF catalogue)
static load rating C₀	45 kN (per SKF catalogue)
mass	1.38 kg

Pictured: NKE 6311-2ZC3. Every brand has its own product page with photo and full description.

Brands and prices 6311-2Z

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
NKE	6311-2ZC3	C3	PLN 59.89PLN 73.66 gross	supplier stockdispatch in 2 working days
INNE	6311-ZZEC3reinforced design, higher load rating	C3	PLN 72.85PLN 89.61 gross	supplier stockdispatch in 2 working days
INNE	6311-ZZEreinforced design, higher load rating	CN	PLN 72.85PLN 89.61 gross	supplier stockdispatch in 2 working days
NSK	6311 ZZ	CN	PLN 76.95PLN 94.65 gross	supplier stockdispatch in 2 working days
NSK	6311 ZZC3	C3	PLN 76.95PLN 94.65 gross	supplier stockdispatch in 2 working days
KOYO	6311 ZZ	CN	PLN 93.37PLN 114.85 gross	supplier stockdispatch in 2 working days
KOYO	6311 ZZC3	C3	PLN 93.37PLN 114.85 gross	supplier stockdispatch in 2 working days
SKF	6311-ZZ	CN	PLN 93.58PLN 115.10 gross	supplier stockdispatch in 2 working days
SKF	6311-ZZC3	C3	PLN 93.58PLN 115.10 gross	supplier stockdispatch in 2 working days
NKE	6311-2ZNR	CN	PLN 100.38PLN 123.47 gross	supplier stockdispatch in 2 working days
TIMKEN	6311-ZZ-C3	C3	PLN 116.47PLN 143.26 gross	supplier stockdispatch in 2 working days
TIMKEN	6311-ZZ	CN	PLN 116.47PLN 143.26 gross	supplier stockdispatch in 2 working days
FAG	6311-C-2Z-C4 (-2Z-C4)	C4	PLN 119.07PLN 146.46 gross	supplier stockdispatch in 2 working days
SKF	6311-ZZC3GJNriveted pressed steel cage	C3	PLN 146.88PLN 180.66 gross	supplier stockdispatch in 2 working days
SKF	6311-ZZC3WT	C3	PLN 164.92PLN 202.85 gross	supplier stockdispatch in 2 working days
NTN	6311-ZZNR2AS	CN	PLN 165.72PLN 203.84 gross	supplier stockdispatch in 2 working days

Can't see your brand? Ask for an offer – we reply within 24 h.

Other versions of 6311

The same size in another design – open, shielded, tapered bore.

How manufacturers designate 6311-2Z

Each brand uses its own seal and design codes. The designations below describe the same bearing.

Manufacturer	Designation	Sealing / design
SKF	6311-ZZ	2Z – metal shields, both sides
NKE	6311-2ZC3	2Z – metal shields, both sides
INNE	6311-ZZEC3	2Z – metal shields, both sides
NSK	6311 ZZ	2Z – metal shields, both sides
KOYO	6311 ZZ	2Z – metal shields, both sides
TIMKEN	6311-ZZ-C3	2Z – metal shields, both sides
FAG	6311-C-2Z-C4 (-2Z-C4)	2Z – metal shields, both sides
NTN	6311-ZZNR2AS	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 6311-2Z are identical for every manufacturer, so the items in the table are interchangeable – just match the clearance and sealing.

Questions about 6311-2Z

What are the dimensions of bearing 6311-2Z?

Bore 55 mm, outside diameter 120 mm, width 29 mm. Standardised dimensions – the same for every manufacturer.

Are 6311-2Z bearings from different brands interchangeable?

Yes. 6311-ZZ SKF, 6311-2ZC3 NKE, 6311-ZZEC3 INNE, 6311 ZZ NSK, 6311 ZZ KOYO are the same bearing under different manufacturers' designations. Match the clearance (e.g. C3) and the sealing.

How much does bearing 6311-2Z cost?

At Castomer from PLN 59.89 to PLN 165.72 net per piece depending on the manufacturer (SKF, NKE, INNE, NSK, KOYO, TIMKEN). Prices are updated from supplier warehouses; larger quantities get an individual offer.

What is the delivery time for 6311-2Z?

Dispatch in 2 working days from supplier warehouses in the EU. Availability is confirmed in the reply to your enquiry.