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688 ZZ-Ball Bearing 8mm*16mm*4mm
System of Measuremen: Metric
Size:8mm*16mm*4mm
Weight:0.0038kg
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Product Introduction
Model Number: 688zz
System of Measurement : Metric
Bearing Type: Ball bearing
For Load Direction: Radial
Construction: Single Row
Seal Type: Sealed
Inner Diameter 8 mm
Inner Diameter Tolerance: -0.008mm to 0
Inner Diameter Ellipticity： ≤0.005mm
Outer diameter： 16 mm
Outer diameter Tolerance -0.008mm to 0
Outer Diameter Ellipticity： ≤0.005mm
Width: 4 mm
Width Tolerance -0.12mm to 0
Width Ellipticity : ≤0.015mm
Dynamic Radial Load： 1115 lbf
Static Radial Load： 539 lbf
Max Speed ： 36000 rpm
Ball number： 9
Steel ball diameter ： ¢2.381mm
Ring Material: GCr15
Ball Material: GCr15
Cage Material Stainless Steel
Lubrication Grease
Temperature Range -20° to 120 °C
Tolerance Class P6
Weight :0.0038kg
DEEP BALL BEARING 688ZZ structural features:
Overall structure: it is a kind of miniature deep groove ball bearing, which is composed of inner ring, outer ring, rolling body and cage. Sealing structure: with metal dust cover on both sides, it can effectively prevent dust, impurities, etc. from entering the inside of the bearing, protect the rolling body and raceway, and improve the service life and reliability of the bearing.
Rolling body structure: the rolling body is steel balls, rolling in the deep groove raceway of the inner and outer rings. This structure makes the bearings can withstand a large radial load, but also can withstand a certain amount of axial load, and the friction coefficient between the steel ball and the raceway is small, which can ensure that the bearings have good rotational flexibility and low friction torque, suitable for use in high-speed operation of the equipment.
Applications
- Small motors and power tools: micro DC motors (e.g. drone motors), electric screwdrivers, handheld drills, etc.
- Office equipment and precision instruments: printer rollers, scanner drive components, optical drive spindle.
- Household appliances: computer cooling fan, juicer shaft, hair dryer motor.
- Models and toys: remote control car motors, aeromodelling propeller bearings, Lego robot joints.
- Medical equipment: dental drills, portable tester rotating parts.
- Robotics: multi-axis robotic arm joints, drive wheels in AGV, bionic fingers
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