Customize Your BLOCK-HEAD® Spindle

With your purchase of a BLOCK-HEAD® spindle, you have an unlimited choice of faceplates including metric call-outs, taper mounts, vacuum chucks, piloted mounts, collet chucks, etc. We can adapt a wide variety of other manufacturers’ hardware: Magnetic chucks, Northfield chucks, Micro-Centric chucks, HSK toolholders, encoders; just about any mounting configuration you can imagine.

Disk Chucks

Professional Instruments Company has long been the source for disk-testing spindles and chucks. We build a wide range of sizes and styles from simple screw-tensioned chuck/cover assemblies to pneumatically-operated, coverless, disk-centering types. Disk inside diameters range from 6-5/8” to 7mm, and the chucks may easily be changed with high accuracy intact thanks to our spherical-piloting system. Call for details.

Piloted Wheel Mount System

Ten times more accurate than tapers. Replaceable options include:

• Collet assemblies
• Chuck assemblies
• Wheel mounts
• Part-holding devices
• Diamond-tool flycutters

C-3 Coupling

The C-3 Coupling provides a reliable motor-to-spindle connection for high-speed, high-precision applications. It is especially suitable for air bearing drives where the spindle must be isolated from the error motion of the drive motor. Each end of the coupling accepts a keyed 5/8” shaft. Flexures in two places accommodate shaft misalignment of 1/8” radially and 2° angularly, while minimizing the influence of the drive motor’s axial error motion on the air bearing spindle. The coupling is delivered assembled, balanced, and ready to install. It requires no maintenance. Customized couplings are available for special applications. Contact Professional Instruments for more information.

Collet Adapters

• Repeats to .0001”
• Uses Hardinge 3C and 5C collets
• Air release
• Part ejection by air blast
• Spherical pilot allows high-accuracy installation on spindle; no need to dial-in
• Ideal for use on BLOCK-HEAD® air bearing spindles