687-2Z
Detailed parameters and installation dimensions:
| Part Number | 687-2Z |
| Series | 68..-2Z |
| Bearing Mass - m | 0.029 kg | 0.064 lb |
| Limiting speed - nG | 57965 min–1 |
| Reference From | FAG 687-2Z |
| Dimension Inside - d φ (mm) | 7 |
| Dimension Outside - D Φ (mm) | 14 |
| Dimension Width - B (mm) | 5 |
| Bore Type | Z = Cylindrical bore |
| Bearing Type | Deep groove ball bearings 2Z design, self-retaining, Gap seals |
| Dimension - d2 | 8.5 mm | 0.335 inch |
| Dimension - D2 | 12.7 mm | 0.500 inch |
| Dimension - r(min.) | 0.15 mm | 0.006 inch |
| Rows NO. | one |
| Mounting dimensions - da(min.) | 7.8 mm | 0.307 inch |
| Seal | 2Z = Gap seal on both sides |
| Mounting dimensions - Da(max.) | 13.2 mm | 0.520 inch |
| Mounting dimensions - ra(max.) | 0.15 mm | 0.006 inch |
| Cage | JN = Stamping steel cage |
| RIC | CN |
| Manufacturer Part Code | 687.2Z |
| Radial Dynamic Capacity - Cr | 1158 N | 260 lbf |
| Radial static Capacity - C0r | 493 N | 110 lbf |
| Heat stabilization | SN = (up to 120 °C) |
| Lubricant | L138 = Grease (L138) |
| Dimension Inside - d φ (inch) | 0.276 |
| Dimension Outside - D Φ (inch) | 0.551 |
| Dimension Width - B (inch) | 0.197 |
| Temperature - T(min) | -30°C |
| Temperature - T(max) | 120°C |
| Radial Fatigue Capacity - Cur | 13.6 N | 3 lbf |
| Coefficient - F0 | 14.2 |
| Ring Material | GCr15SiMn |
| Logistical code | HLC |
NOTE: All other trademarks are the property of their respective owners, used for the purpose of compatibility description and product identification only. Tradebearings is not affiliated with, endorsed by, or sponsored by the holders of these trademarks.
687-2Z refers to a specialized type of 68..-2Z Deep groove ball bearings 2Z design, self-retaining, Gap seals, with dimensions 7 mm (Bore) x 14 mm (OD) x 5 mm (Width), designed for High precision, small size, low friction, primarily used in High-speed, light-load precision instruments, oil speed ratings: 57965 rpm, featuring one (row) construction JN = Stamping steel cage retainer, advanced 2Z = Gap seal on both sides, PN (precision) for applications Within an extremely limited space, it provides high-precision, low-friction, high-speed support for rotating or reciprocating components, while simultaneously bearing certain radial and axial loads. the Basic load can reach (dynamic radial:1158, static radial:493, ), It weight approximately 0.029 kilogram.
Single row deep groove ball bearings (687-2Z) features:
Minimal Size and Compact Structure: Capable of being installed in extremely confined spaces, key to miniaturization and weight reduction; extremely light weight minimizes impact on system inertia.
High Precision and Low Friction: Extremely high surface finish (nanometer level) on raceways and steel balls, with geometric precision strictly controlled at the micrometer level; very low frictional torque, low torque required for startup and operation, and low energy consumption.
High Speed Capability: Due to its small size, light weight, and low friction, miniature bearings can achieve extremely high speeds (typically tens of thousands or even hundreds of thousands of revolutions per minute).
Good Operational Smoothness and Low Noise: Precision machining ensures smooth operation, with extremely low vibration and noise levels.
Various Materials and Design Variations, Wide Adaptability:
Materials: In addition to high-carbon chromium bearing steel, there are stainless steel (corrosion resistant), ceramics (high temperature resistant, insulating, lightweight), and plastics.
Sealing/Protection: Designs with dust covers or sealing rings prevent contaminants from entering and retain grease, meeting maintenance-free or long-life requirements.
Preload: Preload can be applied to eliminate clearance, providing extremely high rotational accuracy and rigidity.
The 687-2Z bearings adopts a High precision, small size, low friction design, featuring one (row) construction from 68..-2Z (series), optimal operating temperature is generally -30 to 120 degrees Celsius. With grade precision of PN and a clearance of CN, the equipment operates more stably , and the maximum speed can reach ( Limit Speed Ratings (oil) rpm:57965).
Single row deep groove ball bearings (687-2Z) application:
Precision Instruments and Measuring Equipment:
Optical Instruments: Microscope focusing knobs, laser scanning galvanometers, photoelectric encoders.
Measuring Instruments: High-precision tachometers, gyroscopes, accelerometers.
High-Tech Electronics and Computer Hardware:
Hard Drives: Spindle motor bearings, requiring ultra-high speed and ultra-long lifespan.
Cooling Fans: CPU/GPU fan motors, requiring long lifespan and low noise.
Optical Drives: Optical disc spindles and laser head drives.
Printers/Scanners: Paper feed rollers, scanning head guides.
Industrial Automation and Robotics:
Micromotors: Core components of servo motors, stepper motors, and brushless DC motors.
Robot Joints: Finger joints of small collaborative robots and robotic arms, requiring high precision and compact design.
Sensors and Encoders: Ensuring accurate signal acquisition.
Medical and Dental Equipment:
Surgical Tools: Rotating components of high-speed dental drills, orthopedic drills, and endoscopes.
Diagnostic Equipment: Precision moving parts in centrifuges, pumps, and ventilators.
High reliability, low noise, and the ability to withstand high-temperature sterilization are required.
Model and Hobby Products:
Model Aircraft/Drones: Motor spindles, propeller hubs.
RC Remote Control Cars: Wheel hubs, differentials, motors.
While these applications are not "high-tech," the demand is huge, and a balance between performance and cost is required.
Office Equipment and Home Appliances:
Electric shavers, electric toothbrushes, blenders, digital camera lens zoom mechanisms, DVD players, etc.
- Min. Order: 1 Piece/(687-2Z, 7 = ID, 14 = OD, 5 = B, 0.029 kg) or according to different suppliers
- Price: Different brands, different quality, different 687-2Z prices, different suppliers and different quality determine different prices, you can ask the supplier in detail for the price according to your own needs.
- Precision Rating: DIN: P2~P0; ANSI: ABEC9~ABEC1; JIS: JIS~JIS0; ISO: CLASS2~NORMAL CLASS; GB/T30794 B~G
- Inquiry ways: The right of the inquiry form, Email, skype, Whatsapp
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tradebearings
Email: [email protected] Tel: 86-0578-18167086030 2022-03-03Hello ,
we are Independent Electronics Distributors located at Virginia
we are in need of below parts immediate purchase
1. SS 693/002-2Z Make : GEBR. REINFURT GMBH & CO Qty:5930
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3. SS 687-2Z GPR J G316 Make : GEBR. REINFURT GMBH & CO Qty:3960
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