Model 10R-606 BLOCK-HEAD®

The model 10R-606 has a clear axial aperture 6.06” diameter, and high radial capacity thanks to a large shaft. Originally designed for lens alignment, it offers ultra-high accuracy in an uncommon configuration, yet it shares the external dimensions of the standard model 10R.

Specifications (at 150 psi)

Load Capacity Ultimate Working
Radial 600 lb 300 lb
Axial 1,000 lb 500 lb
Tilt 2,800 lb-in 1,400 lb-in
Stiffness Radial 3 lb/microinch
Axial 5 lb/microinch
Tilt 60 lb-in/microradian
Error Motion Radial < 2 microinch
Axial < 2 microinch
Tilt < 0.1 microradian
Total Weight 104 lb
Rotor Weight 42 lb
Rotor Inertia 27 oz-in-sec2
Maximum Speed 1,500 rpm
Air Consumption < 4 scfm
Metric Specifications


Load capacity and stiffness are approximately linear with air pressure.

Ultimate load capacity is measured when metal-to-metal contact is made across the bearing surfaces. Working load capacity is half of the ultimate load capacity. Rotor weight must be included as part of total spindle load.

Axial and tilt loads are supported by the same bearing surfaces. Consequently, a load applied in one mode reduces the other mode proportionally.

High speed or high inertia applications require rotor containment. Maximum speed is dependent on application. Consult Professional Instruments for further information with regard to speed.