Dunham Tool manufactures precision spindle headstocks which are
available as complete spindle headstock assemblies and can be
equipped with collet actuators or chuck actuators and pulleys as
optional attachments. Dunham Tool's 50m precision spindle headstock
assemblies can be used with a variety of standard and special
workholding fixtures, and Dunham Tool will provide the spindle
adapter to accommodate your workholding specification. The 50m
precision spindle is designed to accept and actuate 5c collets
directly. These spindles will also accept 1c collet, 3c collet and
r8 collet sizes and manual collet actuators. Our precision spindles
are designed for use in and on a variety of mounting platforms,
either horizontal or vertical.
The highly accurate Dunham
Tool centric precision spindle headstock line now includes models to
allow the creation of small polishing machines, special lathes and
5c collet, 1c collet and 3c collet equipment in the tool room or
machine shop. They can also be used as accurate inspection heads,
lathes or grinders, or as aids in building new equipment.
Using a 5c collet, 1c collet, or 3c collet, precision spindle
capacities range from 1/64" to 1 1/16" for OD holding, 3/4" to 6"
for step chucks OD holding and 1/4" to 6" for ID holding with
Each model is available with either plain nose or 40 taper
nose (which accepts closing rings for Hardinge step chucks up to 6"
diameter). Precision spindle headstock assemblies include a standard
unit with nut closer for through work or a standard unit with
quick-acting lever collet closer. Additionally, the precision
spindle headstock can include a Dunham Tool air collet closer with
vee or timing belt pulley.
In all models, the pre-loaded ball bearing spindle is
guaranteed within 0.00005" TIR.