The selection and ntn roller bearing preload

We use the clutch ntn bearings need to pay attention to what time? This article will introduce this to be a
Clutch motor specifications; electric motor starting torque / rated torque; rated drive torque; operating speed range;
Pieces of inertia driven "j"; over operating speed range; use of the number of life; shaft diameter.
Position Clutch
Positioning exercise frequency / per minute; positioning movement angle; rated torque; be driven pieces of inertia "j"; transmission parts of the acceleration; use of the number of life; shaft diameter.
To prevent the reversal of the clutch
Back impact of torque; most dynamic back impact torque, the torque generated as the endpoint is fixed object, both ends of the point of flexibility between the work of the role of place; over operating speed range; use of the number of life; shaft diameter .
To improve the accuracy of ntn bearing rotation. Increase the rigidity of bearing device, reducing machine vibration shaft work, often using the volatility of bearing preload. For example, the machine tool spindle bearing preload commonly used to improve the accuracy of its rotation and axial stiffness.
The so-called pretension, is a method used in the installation produced in the bearings and maintain an axial force to eliminate the axial bearing clearance, and rolling element and inner and outer contact points produce early deformation. After the bearings are preloaded when the work load, the medical circle of radial and axial relative movement of the volume than unlicensed tight bearings greatly reduce long.
Commonly used tightening device are:
1) clamping a pair of tapered roller bearing outer ring and pretension;
2) with spring preload, the preload can be stable;
3) into the middle of the length of a pair of bearing sets, ranging from simple and preload, preload length difference by the two operators control the device more rigid;
4) clamping a pair of grinding the outer and narrower of the pretension; anti-wear narrow inner ring when installed and clamped. This special angular contact ball bearings installed in pairs, in sets by the manufacturer to provide matching. Rolling samples in different models can be found installed in pairs of light angular contact ball bearings, in three series of pretension load weight value and the corresponding inner or outer narrow the amount of wear.

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