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688-ZZ plastic injected roller bearing WholesaleHome / Products / Plastic coated bearings for doors, windows and sliding doors / 688-ZZ plastic injected roller bearing

  • 688-ZZ plastic injected roller bearing
688-ZZ plastic injected roller bearing

688-ZZ plastic injected roller bearing

Definition：
Plastic-coated bearings generally refer to a layer of plastic on the outer bread of the bearing. The plastic materials are generally nylon PA, polyoxymethylene POM and engineering plastics polypropylene and pp. Outsourcing plastic has certain hardness, impact resistance, friction resistance and certain self-lubricating type.
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Th product YSK produces are widely used in various fields, please do no hesitate to contact us if any needs of bearings!

High-precision equipment guarantees the quality and reliability of product manufacturing

Outer Ring Face Grinding

quality control：
1. height：0um~-120um
2. height parallel difference：≤5um
  • material loading-lift type
  • Incoming grinding
  • height & parallel difference Insepection
  • process diagram

Inner Ring Face Grinding

quality control：
1. height：0um~-120um
2. height parallel difference：≤5um
  • material loading-rotary
  • grinding-chuck type
  • height & parallel difference Insepection
  • processdiagram

Centerless Grinding Of Outer Ring (O.D.)

quality control：
1. O.D. roundness（2~15）：≤1.0um
2. O.D. dimension：+10~+15um
3. Ovality：≤5um
4. Onical degree：≤5um
5. Perpendicular difference：≤8um
6. Appearance: no abrasion and black rust
  • material loading
  • material inputing
  • after grinding
  • O.D checking
  • Process diagram
  • outer ring O.D.roundness detection

Centerless Grinding Of Inner Ring (O.D.)

quality control：
1. O.D. roundness (2~15）≤0.8um
2. O.D. dimension：0~+5um
3. Ovality：≤5um
4. Conicity：≤5um
5. Perpendicular difference：≤5um
6. Appearance: no abrasion and black rust
  • material loading -rotary
  • grinding in process
  • after grinding
  • O.D. checking
  • Process diagram
  • Roundness checking

Super Grinding Of O.D.

quality control：
1. O.D. roundness (2~15）:≤0.5um
2. Grinding quantity：2um~+5um
  • material loading -rotary
  • super grinding with oilstone
  • after grinding
  • grinding quantity inspection
  • O.D. roundness check

Outer Ring Raceway Grinding

quality control：
1. Raceway roundness：≤1.0um
2. Raceway diameter dimension：0~-15um
3. Raceway position：≤20um
4. Raceway parallel difference：≤6um
5. Raceway curvature：R2.55~R2.57
6. Appearance:No burn marks, no vibration marks, no abrasion
  • Material loading -rotary
  • Outer ring raceway grinder
  • Grinding in process
  • Raceway diameter measuring
  • Raceway R inspection
  • Process diagram
  • Roundness checking

Inner Ring Raceway grinding

quality control：
1. Raceway roundness：≤0.8um
2. Raceway diameter dimension：0~-15um
3. Raceway position：≤20um
4. Raceway parallel difference：≤6um
5. Raceway curvature：R2.45~R2.47
6. Appearance:No burn marks, no vibration marks, no abrasion
  • inner ring raceway grinder
  • grinding in process
  • washing & drying after grinding
  • Raceway R inspection
  • Roundness checking
  • Rocess diagram

Inner Ring I.D.(Bore) Grinding

quality control：
1. I.D.dimension：0~-7um
2. Ovality：≤4um
3. Conicity：≤4um
4. Appearance: no abrasion and black rust
  • Bore grinder
  • Grinding in process
  • Washing & drying after grinding
  • Bore size inspection
  • Process diagram

Inner Ring I.D.(Bore) Grinding

quality control：
1.Inside diameter data setting：-0.5um~-6um
2.Internal diameter calibration frequency: 100pcs/time
  • Automatic inner diameter detector for 100% online inspection
  • During the test, probe is into the bore for measurement

Quality Control Requirements Of Supergrinding Process

quality control：
1. Grinding Tolerance：8um~15um；
2. Ovality：≤0.5um；
3. Apparence: examine under a microscope, the magnified raceway, supergrinding finishing should be clean and clear, no scratch.

Fitting

quality control：
1. Clearance：8um~16um
2. No damage to raceway during measuring；
3. No scratch steel balls；
  • Automatic nested device
  • Measuring raceway diameter (outer ring & inner ring)
  • Radial clearance meter
  • Inserting steel ball
Quality product

Provide high-quality bearing products

The professional China 688-ZZ plastic injected roller bearing manufacturers and 688-ZZ plastic injected roller bearing factory takes "expanding the national industry and replacing imported bearings" as its mission. With high-quality products, We have won the trust of customers and developed rapidly. The company's own brands include YGA, QIJI and YSK. The company adheres to the concepts of people-oriented, ruled by law, prospering the enterprise by quality, and continuous innovation. It provides excellent talents with a good development platform to fully attract, cultivate and respect talents. The company establishes a scientific management mechanism and builds an excellent management team.
We sincerely welcome people from all walks of life to visit our company and cooperate with integrity!

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Contact us

If you need it, please contact us!

We have a strong R&D team,and we can develop and produce products according to the drawings or samples the customers offered.

  • Address:

    1# Houheshan Rd, Tianhua Industrial District, Ningbo City, Zhejiang Province, China.

  • Phone:

    +86-(0)574 5898 1713

  • Fax:

    +86-0574-6222 6676

  • Email:

    info@yskbearing.com