HST provides expert Spindle Repair and Rebuild for most lathes and turning centers. The lathe spindle is, consequently, the part of the machine that makes it a lathe. Turning operations remove material from a rotating workpiece by feeding a single-point cutting tool axially, along the side of the workpiece. If you get a three phase motor with your new lathe you can install a VFD between the single phase and the lathe motor and get a much higher spindle speed range. When using G96 it is important to set the maximum speed of the spindle using G50. Spindle speed settings on the lathe are done in RPMs. A steel shaft of 25mm diameter is turned at a cutting speed of 50 metres per minute. Find the r.p.m. Spindle Speed Variation (SSV) is control feature that was introduced in software version L6.03. Spindle turning lathe speeds can reach two, three, four thousand RPMs and higher. We can temporarily set this speed lower with G50. Call 1-603-483-0333.

Spindle turning lathe speeds can be much faster because of the much smaller diameter of wood material and the relatively small amount of mass compared to bowl blanks. As an example, if you speed up the lathe from 1,000 to 1,410 RPM, the CF acting on every point of the workpiece will be doubled. Note, this speed can still be overridden by using the spindle speed override switch on the machine controls. The selection of proper cutting conditions (i.e., speed, feed, depth of cut, coolant, etc.) 2. This high value of the mechanical limit to spindle speed was achieved by machinery makers about 15 years ago; and several manufacturers have delivered such machines in several countries including India. Use the Octavis Vibrational Analyzer program to view the displacement plot as you attempt to balance the spindle. If you do not have set screws to balance the spindle you can order kit 93-2867 . Mathematically, cutting speed = (πDN / 1000) metres/minute. ), a depth of cut of 0.040, and a tool life of 180 minutes. As to spindle speed a lot of the plain bearing lathes would use different viscosity oils on the spindle for different speeds, lighter oils for high speeds and heavier for lower speeds. A wood lathe is a rotary motor tool that spins a piece of wood or metal so that cuts can be made around the entire circumference of the piece to form it and create patterns. For example, using a high spindle speed with an unbalanced wooden blank may cause the lathe to vibrate dangerously. In this section you find the formulas and definitions needed for general turning. The machine commonly is used to make stair railing spindles and furniture legs. This is a photo of the spindle speed plate on my heavy 10 SB lathe. While some lathes have built in speed control, many well-built, less expensive tools do not. For operations such as facing or parting off, as the tool reaches the centreline the spindle will be rotating at its maximum speed.

To calculate the proper RPM for the tool and the workpiece, we must use the following formula: This simplified version of the RPM formula is the most common formula used in machine shops. When using a G97 constant spindle speed command, the spindle speed set by the G50 will be ignored.
When machining in lathes, turning centres or multi-task machines, calculating the correct values for different machining parameters like cutting speed and spindle speed is a crucial factor for good result. Spinning a large turning blank too fast may cause it to explode. This video gives an in-depth look at how the feature works, and shows examples of using SSV both with and without tailstock support. An example G50 block Variable speed of 0-1100 RPM and 0-2500 gives you increased versatility to perform work in both forward and reverse. Turning Speed and Feed Calculator Determine the spindle speed (RPM) and feed rate (IPM) for a turning operation, as well as the cut time for a given cut length. where D = Diameter of job in mm, N = Spindle or job speed in R.P.M.

In practice, when the calculated speed is not available in the machine the next lower value is selected. We can temporarily set this speed lower with G50. Our factory trained spindle repair experts can restore your lathe spindle back to OEM like new condition with a one year warranty. Turning Centers and Lathes Spindle Repair. This calculator will determine speeds and feed rates for machining operations on mill or lathes. I'd start with the heavier oil and go to lighter if the spindle warms too much. The spindle’s entire purpose is to hold and rotate the material to be worked without allowing undue vibration or flutter during the machining process. For operations such as facing or parting off, as the tool reaches the centreline the spindle will be rotating at its maximum speed.


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