627RS Roller Skate Bearings Specification:

Dimension :

Inner bore:7mm

Outer bore:22mm

Height:7mm

Material: 

Ring：Chrome steel 

Cage: steel cage or nylon cage or Dupont nylon cage 

Balls : steel balls or ceramic balls (black Si3N4 or white ZrO2) 627 Hybrid Ceramic Bearings 

Closure:ZZ or 2RS ( can be one side with open ) 

Precision : ABEC-9

OEM Service Welcome : 

Logo print service : we can show your logo on bearings ,such as print (grave)on the seal , or do laser in the bearing rings)

For seals color: we can produce as your need ,we can assemble with different color seal .

FAQ for Skateboard Bearings : 

1.What Precision Shall I Choose ? 

ABEC (Annular Bearing Engineering Council) uses a system to rate bearings. The rating doesn’t include how fast bearings spin, but are a fairly accurate indicator of a bearing’s quality by factoring in the precision the manufacturing process. 

There are ABEC-1 ,ABEC-3,ABEC-5,ABEC-7,ABEC- 9, A higher ABEC rating means a lower tolerance of error by the manufacturer. For example, ABEC 1, the bearings would feel less smooth and have less “roll-out” than a bearing rating ABEC 9. 

With higher precision ,bearings price will be higher ,but it will not have big differenct ,just choose what you need .

2.What is the Difference Between Shielded(ZZ) or Sealed Bearings(RS)?

Both types 608 ZZ bearings and 608 -2RS bearings can protects the balls from dirt and grime. 

For 608-2RS bearing with rubber seals the Sealing performance will be better ,for 608-ZZ bearings can bear with high temperature .

Does the Number of Balls in a Bearing Matter?

MKL BEARINGS can produce skate bearing with 6 balls skate bearings , 5 balls skateboard bearing and standard 7 balls skate roller bearings .


 3.The balls quantity will effect the bearingsfriction and durability. 
For example ,If you have fewer balls, each ball in the bearing must bare more pressure or load.  
The fewer the balls in the bearings the less friction the bearing has. the skate bearings will run faster.

MKL BEARINGS can produce with 6 bigger balls skate bearings ,and we also have bearings with 5 balls ,you can choose what you need .

For more informations about skate bearings just feel free to contact with us .