If you are making special tooling or a custom accessory for your Sherline tools, this will save you the trouble of measuring your particular machine to find a dimension, some of which are actually quite difficult to measure. If you need a dimension not listed here, please call or write with your request.
Most of the regular specifications can be found by looking at the Lathe and Mill product pages which have a Specifications List tab.
| LOCATION | DIMENSION |
| Bed dovetail angle | 55.5 degrees* |
| Lathe bed to spindle centerline | 1.75″ |
| Lathe table surface to spindle centerline (calculated) | .940″ |
| Headstock spindle nose internal taper | #1 Morse |
| Lathe tailstock internal taper | #0 Morse |
| Headstock spindle external thread | 3/4-16 |
| 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-axisLeft-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 |
| Leadscrew thread pitch accuracy | ±0.001″ per inch of travel |
| COLLETS | |
| Sherline WW Collet body diameter | 0.312″ to 0.313″ |
| 8 mm WW collets (by others), body diameter | 0.314″ to 0.315″ |
| WW and 8 mm collet thread | .275-40 |
| HEADSTOCK BEARINGS | |
| Designation/stock number (ZZ refers to “double shielded”) | 6004ZZ |
| Size of bore | 20 mm (0.7874″) |
| Tolerance of bore | 0.0004″ |
| Outside Diameter | 42 mm (1.6535″) |
| Tolerance of OD | 0.0005″ |
| Width | 12 mm (0.4724″) |
| Bearings | 9 balls, 1/4″ dia. |
