Qingdao Gleam Hardwares manufactures 608-2RS sealed deep groove bearings for sliding door rollers, window hardware and other compact rotating assemblies. This page addresses buyers who specifically need a rubber-sealed bearing core. It is different from our existing 608ZZ sport-bearing page and from a finished plastic-coated roller wheel.
608-2RS Purchasing Specification
| Specification point | What the buyer should confirm |
|---|---|
| Reference model | 608RS or 608-2RS, using the complete required suffix |
| Bearing type | Single-row deep groove ball bearing |
| Nominal catalogue size | 8 × 22 × 7 mm; verify the ordered model |
| Closure | Rubber seal arrangement required on one or both sides |
| Assembly | Bare bearing or finished coated roller |
| Operating conditions | Track, load, speed, dust, moisture and temperature |
| Approval basis | Drawing, sample and mutually agreed inspection criteria |
608ZZ vs 608-2RS for a Door Roller
ZZ generally identifies metal shields, while RS/2RS identifies rubber sealing on one or both sides. Neither suffix should be selected from a keyword alone. The correct choice depends on contamination, friction, maintenance and the approved application test. A 608-2Z or 608ZZ request should therefore not be silently substituted with a 608-2RS bearing.
For Sliding Door and Window Roller Assemblies
The 608 bearing core can be combined with a metal pulley, POM or nylon wheel, rubber-coated bearing or PU-coated roller. The finished wheel outside diameter, width, groove and coating are separate dimensions. Buyers searching for a “608ZZ plastic bearing wheel 8×29×10 mm” should provide the finished roller drawing rather than relying on the 8×22×7 mm bearing-core size.
Inspection and Repeat-Order Control
- Verify the complete code and seal arrangement
- Record bore, outside diameter and width
- Check rotation and visible seal condition
- Confirm assembly fit with the customer’s wheel or housing
- Approve labels and cartons before batch packing
This process helps importers reduce mixed-closure stock, assembly mismatch and customer returns. It also gives private-label brands a clearer specification for repeat orders.
Read the 608ZZ vs 625ZZ vs 626ZZ selection guide or browse more OEM bearing products.
FAQ
Is 608-2RS automatically better than 608ZZ?
No. They use different closure concepts. The better option is the one validated for the actual environment and assembly.
Can you quote a rubber-coated finished wheel from only “608-2RS”?
No. We also need the finished outside diameter, width, coating material, hardness or approved sample, groove profile and quantity.
Request a 608-2RS Application Review
Send the complete bearing code, roller drawing, operating conditions, order quantity and packaging. We will review the bearing core and finished assembly requirements together.
