Deep groove ball bearing 6840 – 200×250×24 mm

4 offers · 2 manufacturers · net prices from PLN 944.30 · dispatch in 2 working days

6840 is a deep groove ball bearing with a 200 mm bore, 250 mm outside diameter and 24 mm width, open design (no seals) – for externally lubricated arrangements. 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: 200 mm
outside D: 250 mm
width B: 24 mm
sealing: open
net price from: PLN 944.30

Dimension drawing 6840 – one for all brands (ISO dimensions)

Main dimensions
d – bore diameter	200 mm
D – outside diameter	250 mm
B – width	24 mm

Pictured: NACHI 6840 C3MY. Every brand has its own product page with photo and full description.

Brands and prices 6840

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	6840 C3MYmachined brass cage	C3	PLN 944.30PLN 1,161.49 gross	supplier stockdispatch in 2 working days
NACHI	6840 MYmachined brass cage	CN	PLN 989.22PLN 1,216.74 gross	supplier stockdispatch in 2 working days
NSK	6840 MC3machined brass cage	C3	PLN 1,416.52PLN 1,742.32 gross	supplier stockdispatch in 2 working days
NSK	6840 Mmachined brass cage	CN	PLN 1,592.63PLN 1,958.93 gross	supplier stockdispatch in 2 working days

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

How manufacturers designate 6840

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

Manufacturer	Designation	Sealing / design
NACHI	6840 C3MY	Open
NSK	6840 MC3	Open

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 6840 are identical for every manufacturer, so the items in the table are interchangeable – just match the clearance and sealing.

Questions about 6840

What are the dimensions of bearing 6840?

Bore 200 mm, outside diameter 250 mm, width 24 mm. Standardised dimensions – the same for every manufacturer.

Are 6840 bearings from different brands interchangeable?

Yes. 6840 C3MY NACHI, 6840 MC3 NSK are the same bearing under different manufacturers' designations. Match the clearance (e.g. C3) and the sealing.

How much does bearing 6840 cost?

At Castomer from PLN 944.30 to PLN 1,592.63 net per piece depending on the manufacturer (NACHI, NSK). Prices are updated from supplier warehouses; larger quantities get an individual offer.

What is the delivery time for 6840?

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