 
| production name | 20x27x4 mm pom plastic ball bearing 6704 with glass balls | 
| brand | TFN/OEM | 
| Model Number | 6704 | 
| Dimension | 20*27*4mm | 
| Ring Material | Gcr15/ Carbon Steel/ Stainless Steel/ Si3N4/ ZrO2 | 
| Cage Material | Steel/ Brass/ Nylon/ Custom | 
| Precision | P0, P6, P5, or as requested | 
| Vibration | ZV1, ZV2, ZV3, or as requested | 
| Clearance | C0,C2,C3, or as requested | 
| Quality standard | ISO9001:2000/ SGS | 
| Quality Control Process | 1.Assembly | 
| 2.Windage test2.Windage test | |
| 3.Greasing and gland | |
| 4.Noise inspection | |
| 5.Appearance inspection | |
| 6.Rust prevention | |
| 7.Product packaging | |
| Application | low noise machine,automobile,motorcycle,and the general machinery and etc. | 
 
 
 
1.Q:
Are you a factory or trading company?
 A:SEMRI Bearing is specialized in manufacturing and exporting bearings.
 SEMRI Bearing have own factory and warehouse.
2.Q:Can I get some samples and do you offer the sample free?
 A:Yes, sure, SEMRI Bearing are honored to offer you samples.Can you buy a ticket ?
3.Q:What is the payment?
  A: 30% T/T In Advance, 70% T/T Against Copy Of B/L  
 B: 100% L/C At Sight 
4.Q:What is the MOQ for bearing?
   A: SEMRI Bearing MOQ is 1 pc.
5.Q:What kind of service you can offer?
 A:Technology support;Installation guidance;OEM