Normally, the shield itself will be branded as "608 Z" even though there is a shield on both sides of the bearing. This is for practicality in manufacturing. It is much more economical to produce all the shields stamped as "608 Z" than it would be to manufacture the exact same component with two different stampings on them.
"Z" is a designation which means a steel shield covering the one side of the bearing (for most brands). "ZZ"means that the bearing has a shield on both sides.
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller's listing for full details.
3. Drawing and specification:
· Model NO.: Thin-wall bearings 6805 zz
· Bore Size: 3 - 120 Mm: Outside Diameter: 4 - 240 Mm
· Precision Rating: P0 P6 P5 P4: Seals Type: Open Zz Z 2RS RS
· Noise: Z1V1 Z2V2 Z3V3: Clearance: C0 C3
· Corner Color: Black , Grey, Natural: Zz Lid Color: White, Yellow
· Samples: Free: Size: 25*37*7mm
· Specification: ROHS, SGS, ISO9001
· Structure: Deep Groove: Type: Ball
· Model: Bearings 6805 Zz: Brand Name: Rhr/OEM
· Number of Row: Single Row: Material: Gcr15 or Carbon Steel
· Certificate: SGS & RoHS: Standard: ISO9001
· Plastic Seal Color: Black, Blue, Brown,: Quality Standard: Abec-1, Abec-3, Abec-5, Abec-7
· Trademark: RHR/OEM
· Origin: zibo, China (Mainland)
4. Product advantage：
1). Low friction resistance, low power consumption, higher mechanical efficiency and light start
2). International standard, good interchangeability, convenient for installation and disassembly, and convenient for maintenance.
3). Compact structure, light weight, reduced axial size and longer life.
4). High precision, high speed, low wear and service life increased by 3 times.
5). Can bear combined radial and thrust loads simultaneously;
6). In a large load-velocity range, the unique design can achieve excellent performance;
7). Bearing performance is relatively insensitive to fluctuation of load, speed and running speed.
5. Use field:
Main applications: material handling machinery, crushing machinery agricultural machinery, mining machinery, textile machinery fluid machinery, bionic machinery casting equipment, power equipment, lifting equipment, refrigeration equipment, separation equipment and molding and packaging equipment