7007 & 7005 size bearings
P6 Grade, Angular Contact type
Polymide cage for low noise & vibration
Custom made, precision ground bearing spacers (>= 0.005mm flatness)
4mm allen hex key
Bearing Puller arm
Hanging scales or 1.1kg of weight
Recommended: 3 Ton arbour press
About the bearing kit & spindle
The Grizzly G0704 and Weiss WMD25 R8 spindle is equipped with Taper Roller bearings from the factory. These bearings are often used as wheel bearings on motor vehicles. They have very high load capacity, but are designed for low speeds.
The high load rating of these bearings makes them excellent for very heavy milling operations, but the design of the machine is too light to take advantage of them.
This kit uses Angular Contact bearings, which have lower load capacity. This is due to spherical rolling elements having smaller contact points, allowing for lower friction and higher RPM.
Realistic speeds are in the sub 10,000rpm range. With likely speeds (due to balance issues), being approx 5-6000rpm. Higher speeds could be achieved with professional balancing of the spindle components.
These spindles are NOT precision balanced!!!
Click following link for: Install Manual