Dunham Spindle Headstock Assemblies:

5C, 16C, 3J Thru Hole Spindle Systems:

For Lathes, Grinders, Special Machines:

Dunham  50M Spindle Headstock Assemblies are used to build or retrofit Lathes, Cylindrical Grinders, Polishing Machines and many Special Machines. Please see below for a Dunham CAD Layout Drawing for a complete Dunham 50M Spindle Headstock, Pulley and Air Collet Closer Assembly.

These Dunham 50M Spindle Headstocks are manufactured with high accuracy angular contact bearings yielding spindle accuracies of 0.000020" to 0.000050" TIR.  Typically equipped with Dunham Air Collet Closers and Pulleys, these Dunham Spindles are used for both thru hole and discreet chucking applications. Dunham 50M Spindle Assemblies directly accept all 5C Collets (or optional 1C and 3C Collets) and are rated for up to 6000 RPM operation with 1/4 to 3 horsepower motors. They also run exceptionally well with slow speeds. Dunham 50M Spindle Assemblies are equipped with a variety of Dunham Thru Hole Air Collet Closers for up to 3600 to 6000 RPM applications.

Dunham 50M 5C Spindle with Dunham 5C Air Collet Closer and Pulley

Typically used as 'work holding' spindles (80% of applications), Dunham 50M Spindles are used as 'tool holding' spindles (20% of applications) in R8 and various Morse Taper configurations.  All Dunham Spindle Assemblies produce exceptional, highly accurate results with high repeatability and durability.  All Dunham Spindle Assemblies are designed for light and heavy machining applications of steel, ceramic, powdered metal, pressed carbon, phenolic and other traditional and composite materials.  Dunham Spindles can be equipped with optional Air Purge features to further enhance their durability and longevity when turning, grinding or polishing highly abrasive materials.  As a result of the adjustability of Dunham Air Collet Closers, the work holding pressure applied to a workpiece is highly adjustable for a wide variety of thin wall, fragile, high surface finish or other special or standard workpieces.

Dunham 50MT 5C Spindle, 4 Degree Taper Nose

Again, ideal for use (or retrofit) on Lathes, Grinders, Polishing and innumerable Special Machines, Dunham Spindles provide highly accurate,repeatable, durable and reliable 'work holding' or 'tool holding'spindle solution for today's demanding manufacturing processes in medical, aerospace, automotive, electronics and other industries.

Dunham 50M 5C Spindle Headstock, Pulley and Air Collet Closer Assembly

The Dunham 50M Spindle Systems are one of a wide range of Dunham workholding and spindle devices: 5C, 16C and 3J Cartridge Spindles, Collet Chucks and Collet and Chuck Actuators and Cylinders, Machineable Expanding Mandrels, Expanding Collets, Bar Puller Systems, as well as 5C, 16C and 3J 'Plug and Play' Collet Chucking Systems for all Lathes, Rotary Tables, Grinding Machines and Special Machines, Thru Hole and No Thru Hole Kits available.