Centers & Tailstock Chucks
Top Left: live center with interchangeable
tips. Top Right: bull-nose live center for pipe.
Lower Row: Standard live & two dead centers.
Hit-Miss crankshaft has three centers. A counter-weight was added to the
faceplate.
Various types & sizes of dogs used with a faceplate to grip &
rotate stock being turned between center.
The larger MT-3 dead center is for the spindle
& the rest are MT-2 tapers for the tailstock.
Also see taper calculations.
Accessories in a red oak holder. Wood keeps
moisture away from the metal.
Tailstock Chucks
Obtain high gripping power by using a Jacob's
ball bearing
Super Chuck (0 ~ ½" or 0 ~ 13mm
shown) with MT2 arbor.
Shown holding a ½" stubby HSS drill.
A small 0 ~ ¼" (0 ~ 6.5mm) Jacobs industrial chuck
on a threaded MT-2 arbor.
The tang has to be ground off the arbor in order to obtain the entire tailstock travel
range.
Imported keyless chuck (above) can not take heavy loads e.g.,
drilling with a 1" bit.
This
Taiwan produced keyless (below) is higher quality materials & heavier built.
It also has three holes for tightening/loosening with an adjustable pin
spanner wrench.
0~½" keyless chuck on a
JT33-MT2 chuck arbor.
This keyless has holes to allow tightening with a
pin spanner.
A "live" 1-13mm drill chuck on an
MT2 for the tailstock.
Supports small diameter work where a live center is
not practical.
A ⅜-24 threaded arbor can be used to
adapt the Taig die holder to the 9x20 tailstock.
MT-3 arbors can also be used to mount drill
chucks in the spindle.
Enco is a good, low-cost, source for Phase2+ arbors.
Note: all are hardened & precision ground.
Also see taper calculations.
A tailstock turret can speed
production, though in these machines but it may add some
flexing, too.
This turret uses ⅝" straight arbors. I cut & grind them to
length as needed.
Use differently sized Jacobs wedges in pairs to remove chucks from arbors.