SF688zz
SF Series Stainless Steel Flanged Miniature Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
SF688zz
Basic Information
Bearing type
Ball
System of measurement
Metric
Construction
Single Row
Weight
4.51 g
Tolerance class
ABEC1
Seal type
Shielded
For load direction
Radial
Main Dimensions
Bore diameter
8 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
16 mm
Outside diameter tolerance
-0.008mm to 0
Width
5 mm
Width tolerance
-0.12mm to 0
Inner Ring Dimensions
Inner ring type
Standard
Outer Ring Dimensions
Flange outer diameter
18 mm
Flange thickness
1.1 mm
Ball & Washer Dimensions
Ball diameter
2 mm
Ball quantity
10
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
216 lbf
Radial static load rating
96 lbf
Limiting speed
32.4 X 1000 rpm
Lubrication
Required
Radial internal clearance
0.002mm to 0.013mm
Radial internal clearance
MC3
Materials
Ring material
Stainless Steel
Ball material
Stainless Steel
Cage material
Stainless Steel
Shield material
300 Series Stainless Steel
Environment & Compliance
REACH
Compliant
ROHS
Compliant
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1.59
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
SF688zz Bearing Product Overview & Core Advantages
The SF688zz is a metric single row deep groove ball bearing engineered for precision radial load applications. Constructed entirely from stainless steel (rings, balls, and cage), it offers excellent corrosion resistance. Its compact design, featuring an integrated flange for secure mounting, provides high reliability in space-constrained assemblies. The bearing is shielded (ZZ) on both sides to retain lubrication and exclude contaminants, ensuring consistent performance and a long service life in demanding environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| SF688 | Basic bearing designation, defining the core dimensions: 8mm bore, 16mm OD, 5mm width. |
| zz | Indicates the bearing is fitted with non-contact steel shields (ZZ) on both sides. This provides effective protection against dust and other particulates while minimizing friction. |
SF688zz Bearing Structural Features & Performance Benefits
- Robust Stainless Steel Construction: All critical components, including the rings, balls, and stainless steel cage, are made from corrosion-resistant stainless steel, making it ideal for applications exposed to moisture or harsh chemicals.
- Deep Groove Raceway & High-Capacity Design: The deep groove geometry of the inner and outer rings is optimized to support significant radial loads and moderate axial loads in both directions.
- Integrated Flange for Secure Mounting: The flange (18mm OD) simplifies installation and positioning, enhancing mounting rigidity and stability within the housing.
- Shielded for Protection & Lubrication Retention: The non-contact steel shields help to retain the required grease lubrication and protect the internal components from contamination, contributing to a maintenance-free operational life.
- Precision ABEC1 Tolerance: Manufactured to ABEC1 precision class standards, ensuring consistent running accuracy and smooth operation suitable for a wide range of industrial applications.
SF688zz Bearing Typical Application Areas
This bearing is commonly specified in:
- Small Electric Motors and Gear Motors
- Precision Instruments and Optical Devices
- Office Automation Equipment (Printers, Scanners)
- Medical Devices and Laboratory Equipment
- Food Processing Machinery (due to stainless steel construction)
- Ventilation Fans and Low-Power Pumps
