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：2023-03-10
• Application:packaging machinery,universal category,Vertical machining,respirator,gas turbine,hot and cold box,ignition system,Broadcasting System,circulating pump,Roller mill,other accessories
• Similar models:KOYO SB6848 NTN 6844 CYSD 6848-2RS CYSD 6844N ZEN 684 CYSD 6844 CYSD 6840N NTN FL684AX50 ZEN SF684 ZEN S684-2RS
• 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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