JS6849-4C1L5M4 684ZZ 4x9x4mm bearing shaft roller ball bearing roller guide bearing with bolt 

684ZZ small ball bearings 4x9x4mm with threaded shaft, M4 screw, the guide bearing made of chrome steel material bearing with 304 stainless steel screw, rustproof and high load capacity. long working life, widely use for display stand, Display rack, Vending machines... tools. 

Samples can supply for test if needed, small order are welcome. accept cutomised order, please send your drawing.

Our bearing engineers and designers can tackle virtually any custom bearing project including:

Custom ball bearings                          Custom stainless steel pulley wheel
Custom bushings                                Custom plastic roller wheel
Custom pillow blocks or flanges        Custom linear bearings
Custom rod ends                                 Custom thrust bearings

Changed dimensions and / or tolerances
Extended inner ring
Extended outer ring
Modified/tapered bore
Modified outer ring
Deviating/narrow bore tolerances
Deviating/narrow outer diameter tolerances
Deviating/restricted radial play

What are the benefits of custom bearings? What advantages do they give engineers and the companies for which they work?
Custom bearings let engineers design and use components tailor-made for their specific applications. Such bearings can have longer working lives or better resist corrosion, thanks to bearing material chosen to resist contaminants in an application’s working environment. This reduces replacement and maintenance costs. Custom bearings can be produced with greater load ratings than ‘standard’ selections. They can also be made smaller or lighter to make installation easier. And from a market perspective, they can capture aftermarket replacement business for the OEM.