Precitech air bearing spindles are completely manufactured in house.  Spindle shafts are centerless ground on a high precision Studer CNC grinding machine allowing us to grind the OD of the shaft and faces of the thrust journal in one setup. This ensures squareness and parallelism virtually eliminating once per revolution errors.

The spindles utilize a hardened 440 series stainless steel shaft and bronze journal.  Dissimilar materials ensure no permanent damage to the spindle in the unlikely event of spindle rotation  without air.

The spindle housings incorporate provisions for liquid cooling.

The Precitech spindles can operate at 85 PSI, eliminating the need for specialized air compressors.

Key Features for the HS-75 Spindle:
50% Improved Stiffness and load capacity over predecessor SP-75
•Axial stiffness 600,000 lb/in (105 N/µm)
•Radial stiffness 200,000 lb/in (35 N/µm)
•Greater radial load capacity of 60 lb (27 kg) at the spindle nose

Key Features for the HD-160 Spindle:
33% Improved Stiffness and load capacity over predecessor NT-151
•Axial stiffness to 2,000,000 lb/in (350 N/µm)
•Radial stiffness to 1,000,000 lb/in (175 N/µm)
•Greater radial load capacity of 225 lb (102 kg) at the spindle nose

Key Features for the SP-150 Spindle:
•Axial stiffness to 1,314,000 lb/in (230 N/µm)
•Radial stiffness to 743,600 lb/in (130 N/µm)
•Load capacity at the spindle nose 187 lbs (85 kg)