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Miniature Deep Groove Ball Bearing Inch R4 open oiled 6.35 x 15.875 x 4.978 mm

Item number: R4-OIL

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For use in special conditions. The miniature ball bearing R4 in inch-size is small and suitable for installation with limited space and on thin shafts. It can withstand very high speeds.

Category: Miniature Deep Groove Ball Bearings Inch R

Shipping time: Available

From pcsPrice per unit
40,81 €
100,75 €
500,71 €
2000,69 €
10000,67 €
1,15 €

including 19% VAT., plus shipping charge

Free shipment from 50 Euros
(inside of Germany)

Technical ScribbleZoomable

Technical Data

Inside Ø (mm):6.35
Outside Ø (mm):15.875
Width (mm):4.978
Tolerance for inside-Ø (mm):0/-0,008
Tolerance for outside-Ø (mm):0/-0,008
Tolerance for width (mm):0/-0,12
Internal Clearance:CN (Standard)
Ring Material:Rolling Bearing Steel
Slot & Snap Ring:no
Rolling Element Material:Rolling Bearing Steel
Cage Material:Sheet Steel
Full Complement Ball Set:no
Rows of Rolling Elements:single row
Tolerance Class:ABEC 1 / P0
Type of lubrication:oiled
Product weight: 0,0040 kg


  • miniature ball bearing with smallest dimensions
  • suitable for high radial loads and light axial loads in both directions
  • suitable for high running accuracy, quiet running and very high speeds
  • seal: open (without seal); for higher speeds than with sealed ball bearings and easy relubrication
  • good fixed bearing property, but can also be used as a floating bearing, each in both directions
  • manufacturers of bearings, such as FAG, KOYO, NSK, SKF, SNR, etc. assign different suffixes for their characteristics, for better orientation take note of the comparison table of bearings (see further information)

Further Information


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