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During the new spindle design, INA Bearing, first consider the spindle performance parameters, roughly determine the most critical performance, re-entering further exploration gauge. (Including: spindle speed, the accuracy of the spindle, the spindle rigid spindle life spindle fever spindle reliability)
Decided spindle parameters the probe count the actual size of the spindle (shaft diameter, length, bearing span).
Individual bearing (ball or cylindrical roller child bearing), with columns (with column number), drive way (transmission belts, gears, motors, built-in motor), lubrication (grease, oil and gas, oil mist, spray) and other spindle parameter to determine its structure.
1, bearing radial load
INA bearings mainly take radial load for radial bearings. Type of bearing nominal contact angle a0 <= 450. Ft rain same roller bearing load than the radial direction of the ball bearings can withstand greater.
N type and NU type cylindrical roller bearings can only support radial loads, and other types of radial bearings can bear radial load, also can withstand the axial load.
2, the axial load of the bearing
The axial load bearing general thrust bearing, its nominal contact corner a0> 450. Thrust bearing and thrust angular contact ball bearings under different structures can withstand the axial force in one or two directions. When withstand particularly high force preferred thrust cylindrical roller bearings and thrust self-aligning roller bearings.
Thrust Spherical roller bearings and one-way thrust angular contact ball bearings can withstand axial and radial loads, and other thrust bearings can only support axial load.
3, bearing its own length compensation
Supporting a shaft and bearing are usually fixed bearing and swimming in the bearing structure of the portfolio. Swimming INA bearings compensation axis length error and thermal expansion.
Of NU type and N-type cylindrical roller bearing is ideal for swimming bearings, these bearings themselves can compensate for length. Bearing inner and outer rings can be a tight fit.
4, sliding with length compensation
The inalienable bearing also can be used for swimming bearings. Such bearing two rings with no axial mounting surface. Therefore, bearing a ferrule activities can, in its bearing surface.
After determining the size, the type of precision bearings, considering the specific design of the bearing.
Give full consideration to the bearing fatigue life, stiffness, fever, and other factors to select the most appropriate bearing clearance (preload).
Bearing clearance and preload of INA bearing performance is most critical, the more critical the more high-speed operation, and so must be carefully considered. Select the problem is not the time, but also occurs the early damaged or sintering. Necessary from Step 4 to Step 3 or Step 4 to Step 2, repeatedly consider.
Consider the actual installation of the necessary conditions to determine the spindle structure design.
High precision bearing mounting shaft and bearing accuracy, tolerances, installation required for fixing the adapter nut tightening force, the actual installation INA bearing pre-load and internal clearance confirmation.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-358/354A NTN | 45 | 85 | 21.692 |
| 4T-3776/3720 NTN | 44.983 | 93.264 | 30.302 |