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 expanding collets.
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.
- Unit can be bench mounted, used to
replace worn workheads on lathes or grinders or for building
- Pre-loaded ball bearing precision spindle
with 0.000050" TIR accuracy.
- Rugged 28 pound gray iron body with
crackle paint finish.
- Uses all 1c, 3c or 5c collets.
- Taper nose model accepts step chucks
to 6" diameter, 3-4-6 jaw chucks.
- Air collet closer has 1 1/16"
clearance through drawtube, provides balanced gripping pressure
(adjustable) even with .005" part diameter variations.
Visit our online catalog to view the complete Dunham Tool line of machine tool