Product Name: the high quality and cheap bearing
Model Name:638

the drawing of the high quality and cheap bearing 638

original factory pictures

        


our prodcuts are choice to high grade chrome steel,high precision ball,low radiation cage,good airproof seal and shield.so our prodcuts are waidly used for industrial machinery with both of high quality and cheap price
         the high qualtiy and cheap bearing 638 of ring:
theoutsaid and insaid ring `s material is hgih grade chrome steel or stainless steel, the Hardness HRC within 60-64,the surface is shining.the size D28*d8*W9 mm. we can provide 638RS ,638 ZZ .638 ZZNR.638 Z. 638 2RSNR
       the ball bearing  638 of ball:
the ball is choice by high grade chrome CGr15,the precision is accord with ISO 32900:2001, the work life is long.
       the ball bearing 638 of cage
the cage used by pressed steel.the nail and surface of cage is cementite,the cage is low friction for long life and strong. we also can provied the noly cage
      the ball bearing 638 of seal and shield:
the seal material is NBR+SPCC for Double Sealed 2RS, the shield material is SPCC for Duoble Shielded ZZ,we can according for customer require choice to NON-CONTACTED/LIGHT CONTACTED/HEAVY CONTACTED for seal type AND color.
       the ball bearing 638 of lubrication:
we can according for customer require choice to SHELL / MOBIL / KYODO / KLUBER / EXXON / HTHS grease

the high quality and cheap bearing of Radial Play/Cleareence are C0/C2/C3/C4/C5;The tolerances are accord with ABEC1.ABEC3 ABEC5.ABEC7.