Sherline Lathe User Guide and Specifications

Pulley groove side angle 19°
Table T-slot centerline distance (lathe and mill) 1.5"
T-slot nominal dimensions**
**Note: The T-slots are extruded into the material. Table
surfaces are machined for flatness, but the slots
themselves require no additional finishing processes.
Slot width, top: .25"
T width, bottom: .40"
Upper slot depth: .10"
T Slot depth: .10"
(Total depth: .20")
Leadscrew thread pitch, inch
(Lathe, mill X and Y axes = 1/4-20, Mill Z axis = 3/8-20)
20 threads per inch or
.050" travel per
revolution (handwheels
divided into 50
increments of .001")
Leadscrew thread pitch, metric
(Lathe, mill X and Y axes = 6.3 x 1 mm, Mill Z = 10 x 1
mm)
1 mm travel per
revolution (handwheels
divided into 100
increments of .01mm)
Leadscrew thread directions
Right-hand: Lathe
crosslide, Mill X-axis
Left-hand: Lathe
leadscrew and tailstock
screw, Mill Y-axis and
Z-axis
*NOTE: This dimension was determined by measuring the extruded bases that were
supplied when we first took over production in the USA from the former Australian
manufacturer. The base and several other parts were cast to match this angle and it
was not economically feasible at the time to change it to an easier-to-
manufacture 60
degrees. The original 55-degree angle was determined by a reference to Machinery's
Handbook, Vol. 17 as the ideal angle to cut a dovetail. When we took over
production, a fixture was produced in-house to duplicate the existing angle which
had changed slightly from the original 55° to an actual 55.5°. This fixture became
the "standard", and every machine built since the early 1970's has been measured
against this same fixture. The older brass beds and the current steel beds as well as
the parts that fit them are all ground to this same angle.
ALLOWABLE TOLERANCES
Spindle Runout (at spindle nose), Maximum allowable
(Most are within .0002-.0003")
0.0005"
Spindle End Play (adjustable with preload nut), Factory
Settings
with 2800 RPM Pulleys:
0.0002"
with 10,000 RPM
Pulleys: 0.0003"
Self-Centering 3-jaw and 4-jaw chuck runout 0.003" or less