ntn bearing angular contact ball bearings is mainly used in machine tool spindle. In most cases, locking the outer ring of this bearing the mouth and can not seal the resulting circular groove, so many used in the machine spindle angular contact ball bearings can not be used for other hosts as the other bearings as lubrication.If installing a set of auxiliary lubrication system, not only to increase costs and make the structure more complex machine.

How to correctly install the demolition of cylindrical bore bearings to the heart:1. Install: Usually, the outer ring can not be separated to the heart bearings, inner ring and the shaft often with a more compact; outer ring and the seat is a more loose with the hole. At this point the pressure will be available first press installed in the shaft bearings,and then loaded with bearing housings with coaxial holes. Press-fit sleeve assembly used with a soft metal such as copper or mild steel can.

 ntn bearing lubrication methods introduced 41, oil ring lubrication: lubrication only way for the horizontal axis. By hanging in the shaft and can rotate the ring to the oil pool oil into the bearing. Applicable to medium-speed shaft diameter greater than 50mm and high-speed bearings. Oil ring preferably seamless, bearing wide-diameter ratio less than 2, may use only one oil ring, Otherwise required two oil ring.

2 common Plain Bearings1, split bearings split bearing, the bearing housings, bearing caps, bushing (divided into upper and lower tile) and connecting bolts and other components. Subdivision bearing surface should be close to vertical loading direction, most bearing surface is split level, there are oblique.Bearing cap and bearing of the subdivision surface often Zuocheng ladder for work positioning and prevention of dislocation.

1: ntn bearing the international standards:China Bearing Industrial Association (CBIA)American Bearing Manufacturers Association (ABMA)American National Standards Institute (ANSI)Japanese Industrial Standards Committee (JISC)Standards Engineering Society
International Organization for Standardization (ISO)Scandinavian Bearing Association (SBA)German National Standards Organization (DIN)
Japanese Standards Association (JSA)Typically, ntn bearing the criteria used are ISO standards.

1: ntn bearing performance:1.ntn bearing stiffnessntn bearing stiffness, is ntn bearing power generating units, the size of the required deformation. Rolling of elastic deformation is small, in most machines do not have to be considered, but in some machines, such as machine tool spindle,the bearing stiffness is an important factor, the general should be used cylindrical and tapered roller bearings. Because these two types of bearings and loaded

ntn bearing clearance adjustment. Radial bearing clearance with top clearance, side clearance, shown in Figure 1. Tip clearance can be kept liquid friction, the numerical size of shaft, rpm, the viscosity of the oil. Generally between control I/lO00d ~ 3/lOOOd (d axis diameter). Backlash is the role of the accumulation and cooling lubricants, the formation of the oil wedge,

ntn bearing support choose to pay attention to four problemsFirst, how to limit the axial position, including the radial and axial position are the first issues to consider. General dual-axis multi-support structure, the radial shaft supported by two co-limited, each supporting Department should play the role of radial positioning or angular contact bearings to the heart.Second, the axial position of supporting the restrictions by the two axial displacement in one direction is also limited by a supporting axial displacement in both directions,