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Quick Details

  • Structure: Deep Groove
  • Type: Ball
  • Brand Name: FreeRun or FRC
  • Bore Size: 1 - 15 mm
  • Outside Diameter: 3 - 50 mm
  • Model Number: MR Series,R series,67 series,68 series,69 series MF,F67,F68,F69series.
  • Precision Rating: ABEC-1,ABEC-3,ABEC-5,ABEC-7
  • Seals Type: Open, ZZ (2 Metal Shields),2RS(2 rubber seals), 2TS(2 teflon seals)
  • Number of Row: Single Row
  • Place of Origin: Fujian, China (Mainland)
  • Miniature ball bearing Material: Stainless Steel AISI440 (9Cr18),Ceramic and steel GCr15
  • Cage/Retainer type: Crown, Ribbon
  • Retainer material: Stainless Steel,Nylon,PTFE,PEEK
  • Balls: Stainless balls,Ceramic Balls
  • Quality-standard of balls: G10 as DIN 5401, ISO 3 290,G5 for ceramic balls
  • Lubracation: Grease, Oil, Dry
  • Grease Lubrication: Kyodo Yushi Multemp SRL (25% fill-grad)
  • Oil Lubrication: Shell Air Oil#12
  • Vibration Level Codes: V4,V3,V2,V1
  • Radial Play: C0,C2,C3,C4,C5

Packaging & Delivery

Packaging Details 10 pcs in one plastic tube,10 tubes in one paper box.
Delivery Time it depends on the order quantity

High Performance Miniature Ball Bearing

1. Freerun

Miniature Ball Bearing Description                                                                                    

FreeRun is a specialized manufacturer of Miniature Ball Bearing,Miniature Bearing.

Has become one of the leading mini bearing,micro miniature bearing,miniature precision ball bearings in china.


Miniature Type Ball Bearing Descrition:

 iniature ball bearings are machinery components, which comprise an outer ring, inner ring, balls, retainers, shields and snap rings. Miniature bearings and small-sized ball bearings have up to 60mm in external diameter.

 Deep groove miniature ball bearings are single row bearings,we offers an extensive selection of bearings.we have miniature bearings starting from 1 mm inner diameter, miniature bearings can be made of material with carbon steel, ceramic,chrome steel or stainless steel.We manufacture more than 5,000 different types of miniature small bearings, Most of precision miniature deep groove ball bearing are available to handle radial, thrust and combined loads in proportion to the capacity requirements of the small shafts for which they are designed.



Miniature Ball Bearing Product Information                                                                                                                                                                        


Miniature Bearings can be Category by Configuration as follows:

Open Miniature Ball Bearings

Open,With extended inner ring minature ball bearings

Shielded miniature ball bearing

Shielded,With extended inner ring miniature bearing

Sealed miniature Bearing

Sealed,With extended inner ring miniature bearings

Flanged,open miniature bearing

Flanged,open,with extended inner ring miniatue ball bearings

Flanged,shield miniature bearings

Flanged,shield,with extended inner ring minaiture ball bearings

Flanged,sealed miniature ball bearings

Flanged,sealed,with extended inner ring miniature Bearings




The same size can be made of different materials, including,
Stainless Steel Bearings 

Chrome Steel Bearings   

Carbon Steel Bearings   
Ceramic Bearings


3.Freerun Mniature Bearing Manufacturing Process                                                                                                                       






Package: 10 pcs in a plastic tube,10 tubes in one paper box. 


Industrial-packing:  10 pcs in a soft shrink-wrap weld with printing stick-label as Brand . 


Special Packing: different size with different qty in ziplock bag.



Product  Certification                                                                                                   


Quality Certification

SGS RoHs Test Report

Test Report of Raw Material

Test Report of Raw Material

Test Report of Miniature Bearing





6.Freerun Miniature Ball Bearing


Oils – maintain their consistency well over a wide temperature range and are easy to apply. For very low torque applications, a light instrument oil should be specified. Higher running speeds are possible with oil but the obvious drawback with oil is the fact that it tends not to stay in place.

For anything other than very low speeds, continuous lubrication through oil mist, oil jet or oil bath is normally necessary. An exception to this is the use of a retainer (cage) that can be impregnated with oil such as the phenolic retainer. Perfluorinated oils can offer improved performance at slightly higher speeds as they don't migrate (run out) as easily.
Greases – are simply oils mixed with a thickener to so that they stay inside the bearing. Greases are generally more suitable for heavy loads and have the obvious advantage of giving constant lubrication over a long period without maintenance.




Main Market                                                                                                                                                                                            





The Advantage Of Products                                                                                      


  • High Speed: Most of Freerun Miniature bearings can reach a resistance level of 50,000 RPM with grease lubrication.
  • Long Service Life: The service life of Freeru miniature bearings is 4 to 6 times longer than other suppliers in comparable working conditions.
  • Self Lubricating: Even when poorly lubricated or with no lubrication, Freerun bearings will continue to function longer than other bearings under the same level of stress due to their self lubricating properties.
  • Low Friction: Our bearings have a low friction force. Even under the conditions of boundary lubrication, the surfaces are extremely smooth, so its friction force is low and the rotational friction moment is low.
  • Supply quickly from large Stock:  Over the years we have developed extensive product knowledge and offer technical help with all apsects of our range. We keep comprehensive stocks across the whole range so offer a same day despatch worldwide on most sizes if required. We receive incoming shipments every week so stocks are always changing. For the most up to date stock situation on any item,Please contact us.









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China (Mainland) | Manufacturer, Trading Company
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Supplier's Trade Assurance Limit: US $106,000
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