Spindle Parts and Definitions
Different spindle styles, belt driven or integral motor spindles, have specific parts and components. Most of these types of spindles can be controlled using a CNC machine. Using a CNC machines allows for precision and perfection. A CNC machine uses x, y, and z coordinates to create accurate marks, cuts, and grindings.
Spindle Housing
Shaft and motor are housed together, transfers all forces from the spindle
Locates and supports bearings
If oil is used, must have holes to deliver to the bearings
Cooling liquid is used to remove heat
May be block, foot mount or flange mount
Spindle Bearings –Type, Quantity, Mounting, Lubrication Method
Design– tapered, angular contact, precision
Contact Angle- Angle between ball-to-race contact line and plant through ball center
Provide precision, load carrying capacity, speed
Determines ratio axial: radial loading
12°, 15°, 25°
Lower the angle –greater load carrying capacity
Higher the angel- higher axial loading capacity
Preload – light, medium, heavy
Light- max speed and less stiffness
Heavy– less speed, higher stiffness
Configurations – groups of two or three
Face to Face– creates an X, not very common, withstand both axial and radial
Back to Back- creates an O/DB, most common, provides good accuracy and rigidity
Tandem– creates a DT, uses a combination of configurations, spacers are used
Construction – Hybrid Ceramic
Do not react to steel raceways
Operate at lower temperatures
Lower vibration Levels
Roller Bearings
