Model 10R BLOCK-HEAD®

High capacity and ultra-high stiffness make the model 10R ideal for turning or grinding heavy workpieces, or as an ultra-rigid toolpost pivot. When integrated with a high-power motor, the model 10R forms the heart of a state-of-the-art optical-surface generator.

Specifications (at 150 psi)

Load Capacity Ultimate Working
Radial 400 lb 200 lb
Axial 2,400 lb 1,200 lb
Tilt 6,000 lb-in 3,000 lb-in
Stiffness Radial 2 lb/microinch
Axial 10 lb/microinch
Tilt 100 lb-in/microradian
Error Motion Radial < 1 microinch
Axial < 1 microinch
Tilt < 0.1 microradian
Total Weight 154 lb
Rotor Weight 72 lb
Rotor Inertia 36 oz-in-sec2
Maximum Speed 1,800 rpm
Air Consumption < 3 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.