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Lathe Bed
A one piece massive iron casting of cantilever
form incorporating auto-traverse clutch box. The bed is dovetail in
form and ground on all faces. A central Tee-slot provides a positive
and accurate location of the tailstock. A gap in the bed allows for
the swinging of a clock wheel up to a diameter of 120mm. |
Solid cast iron ensures rigidity
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Saddle and Slides
The cast iron saddle can be rapidly or sensitively
traversed via the saddle lever feed (a leadscrew can be fitted if preferred).
A long tee slotted cast iron crosslide permits the mounting of accessories
such as the Vertical Milling Slide(RG55), Milling Head (RG85), Jacot Unit
(RG59) and Roller Filing Rest (RG53) and may also be used as a table for
in line boring. The crosslide has an etched angular scale 45° - 0 -
45° and carries the swivelling Topslide to permit taper turning. A quick
change height adjustable tool holder is fitted. All slides are fitted with
full length adjustable gib strips. Handwheels are stainless steel and are
fitted with very accurate computer laser etched reset-to-zero calibration
dials. The clearly marked dials are graduated in 50 increments of 0.02mm.
The choice of Saddle Lever Feed or Manual Feed Leadscrew is a matter of
preference; there is no price differential between either option. Cowells
can supply either option as a retro-fit if required.
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Tailstock
The tailstock is cast iron, bored and honed to accommodate
the hardened ground steel barrel. The barrel accepts the 8mm horological
collet, which is secured in the conventional manner with a draw-in bar.
The barrel is lever fed to facilitate high sensitivity drilling. Locking
handles are fitted to both body and barrel. The tailstock may be off-set
for the turning of long and shallow tapers.
Tailstock lever feed aids sensitive drilling. The image to the right is
an arbor being drilled whilst supported in the (RG59) Jacot Cone for re-pivoting.
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Headstock
The cast iron headstock incorporates opposed
cone phosphor bronze bearings front and rear with a hardened and ground
steel cone running in the rear bearing.A fine threaded adjuster nut
fitted to the rear of the headstock spindle acts upon the steel cone
for the elimination of spindle end-float. This high quality bearing
arrangement ensures longevity and spindle concentricity and eliminates
'tool chatter' and eccentricity so often found in machines fitted
with small inferior ball bearings. The headstock spindle is hardened
and ground and directly accepts 8mm collets and tooling. The typical
T.I.R. (total indicated run-out) being 0.005mm. The spindle also incorporates
a plain diameter and back face with 3 x threaded holes for the mounting
of 3-Jaw Chuck(RG9), 4-Jaw Chuck (RG10) and Faceplate (RG28) via the
Chuck Adaptor (G13) This method of fixing the 3-jaw chuck etc. ensures
accuracy and rigidity which can often be a problem associated with
8mm collet lathes. The headstock pulley has 60 index holes and a spring
steel detent arm providing a direct headstock spindle indexing facility.
The headstock is fitted with spring cap oilers to both bearings incorporating
felt pads for the retention of lubricant.
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The headstock spindle has a 60 division indexing
facility
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Accuracy
Each lathe undergoes a meticulous examination
of its accuracy prior to delivery. Eight main tests are recorded on
an Engineers Test Certificate. The certificate carries the lathe's
serial number, is signed and dated and represents Cowells accuracy
guarantee. Typical overall accuracy is 0.005mm. |
Test Certificate
Accuracy Guarantee
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