d - 4 mm

D - 9 mm

B - 2,5 mm

C - 2,5 mm

r min. - 0,15 mm

r1 min. - 0,15 mm

da min. - 5,2 mm

Da max. - 7,8 mm

ra max. - 0,1 mm

Weight - 0,0006 Kg

Basic dynamic load rating (C) - 0,64 kN

Basic static load rating (C0) - 0,23 kN

(Grease) Lubrication Speed - 59000 r/min

(Oil) Lubrication Speed - 70000 r/min

Calculation factor (f0) - 12,8

• Model Number: 684
• Inner Diameter：4mm Outer Diameter：9mm Width：2,5mm
• Type：Deep Groove Ball Bearings
• Update date：2025-12-17
• Application:coal mill,Spectrum Products,screen filter,Cleaning equipment,Polymer,climb ladder,multi-knife lathe,electrocardiograph,Air,root canal filling,Tool
• Similar models:ZEN SF684-2Z KOYO 306842A NSK 6844 ISO F684ZZ CYSD 6844-2RS CYSD 6844-RS FBJ 684ZZ NSK 6840 CYSD 6848-ZZ AST 684H-2RS
• BEARING POWER International Trading Co.,Ltd. specialize in 684 products，there is large inventory of KOYO 684 . We has been built up long-term cooperation with KOYO company, could make a bulk order of the 684 Which KOYO 684 is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express.Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

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