68 Series
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685 Deep Groove Ball Bearing
Deep groove ball bearing · brand NCWY
685
d5mm
D11mm
B5mm
Mass, approx.1.7 g
- Open / ZZ / 2RS / 2RZ closures
- P0 / P6 / P5 precision · C0–C5 clearance
- Noise grades ZV1–ZV4 / EMQ
Overview
685 is a deep groove ball bearing with a 5 mm bore, 11 mm outer diameter and 5 mm width, part of the 68 Series family. Boundary dimensions follow GB/T 276 / ISO 15 and are cross-checked against the factory attribute tables where available.
The 68 Series is our thinnest miniature family. With a 3–10 mm bore and a low cross-section, these bearings suit compact, high-speed assemblies where space is tight and running noise matters. It is normally supplied open or with ZZ metal shields, 2RS rubber seals or 2RZ seals, in precision grades P0/P6/P5 and radial clearance C0/C2/C3/C4/C5. Typical applications include precision instruments, small DC motors, fans & blowers, office equipment.
Open and sealed (ZZ/2RS) widths may differ; the B listed on this page is the common sealed width — confirm open width against the drawing.
- Closure options: Open, ZZ, 2RS, 2RZ — open, metal shield or rubber seal to suit dust and grease retention.
- Precision P0, P6, P5; clearance C0, C2, C3, C4, C5; noise grades ZV1, ZV2, ZV3, ZV4, EMQ / CM.
- GCr15 chrome steel (100Cr6), 58–62 HRC; steel or nylon cage options.
- Stainless rings, ceramic balls and non-standard sizes can all be ordered to drawing; black chamfer, chamfer colour, custom grease and customer marking also available on request.
Boundary dimensions
| Model | 685 | Series | 68 Series |
|---|---|---|---|
| Bore diameter d | 5 mm | Outer diameter D | 11 mm |
| Width B | 5 mm | Chamfer r min | 0.15 mm |
| Mass, approx. | 1.7 g | Closure options | Open · ZZ · 2RS · 2RZ |
| Precision grades | P0 · P6 · P5 | Radial clearance | C0 · C2 · C3 · C4 · C5 |
| Noise grades | ZV1 · ZV2 · ZV3 · ZV4 · EMQ / CM | Cage | Steel · Nylon |
| Ring material | GCr15 chrome steel (100Cr6), 58–62 HRC | MOQ | 2,000 pcs standard models (trial orders negotiable; samples available) |
| Lead time | 7–25 days for standard models; 30–50 days for special or custom orders | Packing | Plastic tube · Single box + plastic bag · VCI anti-rust paper · Export carton · OEM packaging and labels |
| Ports | Ningbo / Shanghai | Payment | T/T 30% in advance, balance against B/L copy; L/C at sight |
Dimensions in millimetres. Mass is approximate and depends on closure, cage and grease. Load ratings and limiting speeds are available on request.
Variants and customisation
The base model can be supplied in the closures, tolerances and noise grades below. Anything outside this list is quoted on drawing.
Closure options
OpenZZ2RS2RZ
Precision grades
P0P6P5
Radial clearance
C0C2C3C4C5
Noise grades
ZV1ZV2ZV3ZV4EMQ / CM
Cage
SteelNylon
Customisation
Black chamferChamfer colourCustom greaseCeramic ballsStainless steelCustom marking
Typical applications
Typical uses for this family. Send the application and we will advise on closure, clearance and grease.
Quality & documentation
Noise and vibration graded in-house; SGS RoHS test report available for compliance files. ISO 9001, CE, SASO and PVOC documents on request.
Boundary dimensionsGB/T 276 · ISO 15
Noise & vibrationZV1–ZV4 · EMQ
SGS RoHS reportSHAEC1610052101
