NSK 6806 DD 30x42x7 Fully Contacting Seal

(1 customer review)

£24.00 (£28.80 inc VAT)

NSK 6806 DD 30x42x7 Fully Contacting Seal Genuine Bearing,

10 in stock

SKU: BRG-NSK-6806-DD Category:


This is a Genuine Bearing and not counterfeit or B grade Stock. Read more about this here

  • CN normal clearance
  • P6/P6 tolerances on inner and outer rings
  • Excellent grease retention requires little maintenance
  • Premium Tier 1 supplier

NSK are an OEM supplier to Shimano and SRAM. Their bearing technology and specifically material technology is high regarded and amongst the best in the world. NSK is the largest bearing manufacturer in Japan and second largest in North America.

These bearings are genuine NSK bearings sourced from NSK in Newark England. They are not counterfeit or B grade stock.


Q. What is the best bearing brand?

NTN, NSK, FAG and SKF are all quality bearing suppliers and their products meet ISO/JIS/DIN standards. When selecting a bearing it is important to ensure that the bearing fits correctly within the enclosure. Far eastern bearings sold on ebay or amazon are often out of specification in one or multiple parameters, these fit issues manifest themselves as creak or poor bearing life. Some sellers have been known to sell fake bearings which are very difficult to spot without specialized measuring equipment, fitting these usually presents the same problems. In short, fitting genuine branded bearings is recommended

Q. Which seals do you recommend?

For road racing, NTN LLB series, SKF RZ series and NSK VV series are recommended. For inclement weather or extended life, NTN LLU series, SKF 2RS series, NSK DD series or FAG 2RS series are recommended

Q. Which bearings have the lowest friction?

NTN LLB series followed by NSK VV series, SKF RZ series and then FAG BRS series

Q. How many bearings is this listing for?

All bearings on this website are sold in Singles unless otherwise stated

Additional information

Inside Diameter (d)


Outside Diameter (D)


Width (b)





Fully Sealed

Bearing Number


1 review for NSK 6806 DD 30x42x7 Fully Contacting Seal

  1. Philip D.

    I haven’t been able to install the bearings yet as I can’t get the old ones out of my C-Bear BB (they leave you 0.5mm radially to get a tool onto the bearing to push it out, so I suspect they want you to buy a new BB all the time!)!!

    Hambini has provided advice beyond what I would expect for someone buying a couple of bearings.

    Delivery was swift and inexpensive.

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