/Type /ExtGState Head stock is the widely used component on lathe machine. 1 0 obj The rear end of the cross slide is then tightened with a guide block by a belt. If it is a Turning operation, the tool is placed perpendicular to the workpiece. These two motions (longitudinally and crosswise) help to remove the chips in the metal and give the proper shape to the job. Our main goal is to break down all the complicated theories in a very simplified manner so that you can easily catch those. Base: the bottom surface of the tool shank. The wheel lathe is used for machining journals and rail rods. So let me give you the introduction of the lathe machine tool. In the last article, we had discussed the Drilling Machine, Surface Grinding Machine, Milling Machine, lathe machine, etc. A right-cut tool is used to make the square shoulder. Home; Thermal Engineering >Steam Boiler >Steam Engine This method is used for turning steps and short tapers. /Width 32 The speed lathe is commonly used in wood turning, metal spinning, centering for metal cylinders and polishing etc. Side Rake Angle: The angle at which the face is ground away from the cutting edge. The calculations are approximations of spindle speeds valid for spur gears and straight splines. Four different types of chucks are most commonly used in Lathe: It is used for irregular shapes, rough castings of square or octagonal in such jobs, where a hole is to be positioned off the center. A lead screw is also known as a power screw or a translation screw. So rotation of the job is obtained by the chuck and the desired linear motion of the tool-post (as the lead screw drives the saddle when it is engaged) is provided with the help of a lead screw. Shoulder Turning is used in the case where several diameters are to be turned on the workpiece. The headstock spindle is rotating at a very high speed. The very early stage of this machine was developed around 1300 BC at that time there were not developed so many parts except the headstock and Tailstock. Continue this process until the tool is within .010 inch of the finish depth. Lathe machine is probably the oldest machine tool know to mankind. Feed rod is a power transmission mechanism used for precise linear movement of the carriage along the longitudinal axis of the lathe. Even though F L (the combined force from all clamps on the left side) equals zero, a small clamping force may be desirable to prevent vibration. Accuracy produced on the component depends upon the accuracy present on the tool. This is best suited for the production of the small parts because of its lightweight and short stroke of capstan slide. The main function of the headstock is to transmit power to the different parts of the lathe. Lathe Machine Definition: A lathe machine is a machine tool that removes the undesired material from a rotating workpiece in the form of chips with the help of a tool that is traversed across the work and can be feed deep into the work. 2. It also consists of three tool posts. Machining Time for a Complete Cut minute. Any increase in the length of the taper will require the use of a wider cutting edge which may destroy the workpiece due to the vibration and spoil the workpiece. Some mechanisms are responsible for its automation in it. 12. The feed rod is used for most turning operations and the lead screw is used for thread-cutting operations. The angle formed by the end cutting edge and a line at right angle to the centerline of the tool bit. Our more advanced thread calculators are extra-cost modules. 1. It is a process of removal of excess material from the workpiece in minimum time by applying a high rate of feed and heavy depth of cut. vc= (Dmn)1000= (3.1450700)1000 =110 (m/min) Cutting speed is 110m/min. The feed rod is used to move the carriage from the left side to the right side and also from the right side to the left side. they are not used for mass production. The workpiece is mounted in a chuck at the headstock spindle and the reamer is supported by the tailstock. Cutting Edge: the leading edge of the tool bit that does the cutting. m) same as turning "hp. My aim is to provide useful and engaging content to our readers. a lathe in one pass. Center Lathe machines are driven by the gear mechanism or pulley mechanism. The exact RPM is not always needed, the following calculator (formula) may be used to estimate the value closely. (Threads per inch). Drilling operation is a type of machining operation which is used to remove the material from the workpiece by making use of a drill bit, which is held stationary in the Tailstock. It is commonly used in. The detailed explanation of all the parts is as follows. The combined centre of gravity of machine and foundation should, as far as possible, be in the same vertical line as the centre of gravity of the base plane. 10/29/2015 Dsign and Development of Conventional Lathe Machine 6 toothed gear is used for producing Metric threads on engine Lathe. The Lathe Machine is an ancient tool. Thread cutting on the lathe is a process that produces a helical ridge of uniform section on the workpiece. Chiseling is a cutting operation involving a hand tool known as a chisel. The boring tool is also fitted on the tail stock. slide is provided with a female dovetail on one side and assembled on the top The following diagrams and formulas will be helpful when calculating thread dimensions. The main function of lathe machine is to remove the material from the surface of the workpiece to give the desired shape and size as per the dimensions. n = rpm (revolution per minute). A Mechanical Engineer with 19 years of working experience in various renowned MNCs. It prevents the deflection produced by the cutting forces. It supports the main spindle in the bearing and aligns it properly. after that, the tool post was moved to the workpiece. UN & ISOThread Calculator. Nose radius: The radius to which the nose is ground. In metric units, K=1 to get the result in Cm 3. And it is also used for a small amount of taper for a long job by offsetting the tailstock. Please Read Instruction Manual before Starting the Machine. Shank: the body of the tool bit or the part held in the tool holder. In some cases, the combination of gears given will produce an approximation of the pitch you need. They are of permanent magnet type or electrically operated. Because of the sagging problem, the maximum length of the brass lead screw will be 2 meters only. Set the quick change gearbox for the required pitch in threads. Learn Mechanical is maintained by Anup Kumar Dey and Atul Singla. It is also used for turning the threads on locomotive wheels. It is used to hold circular or cylindrical shape jobs. *AIPZEXOA% dV) !o;DPlpfPW=wz[@6k}=F|/8I@SaHOH The purpose of a lathe is to rotate a part against a tool whose position it controls. It is also known as the father of all standard machine tools. This angle may be 14 degrees for general purpose tool bits. It consists of three jaws that move simultaneously by turning a key and the workpiece automatically remains in the center of the chuck opening. Note: At the end of article you can download whole document in PDF format easily. Machining Power Calculator and Formulas Calculating the power required (in kW or HP) from a CNC machine to perform particular milling, turning, or drilling operation is essential to validate that our equipment can execute the machining operation without getting too close to its power limit. The equations are valid for any case as long as metric units are used throughout. It is important that the chuck or faceplate is securely tightened onto the lathe's spindle. Lead Screw is used for Thread Cutting operation in a lathe machine tool. 4. It should act as a house for keeping some of the parts in a machine tool like Prime mover of a machine, gearbox, coolant tank, etc. The pan is used to collect the chips during machining operation. What are the different Types of Car Headlights? Light cuts and high speeds necessitate the use of this machine. In the thread cutting operation, only the automatic feed is given. It has all the similar parts to the engine lathe and speed lathe. This design was further improved by the Ancient Romans who added the turning bow and lather the paddle (as there in the sewing machine) was added. It is fixed on the top slide. Chuck is used to holding the workpiece securely. Lathe machine is a general-purpose machine tool, which is used for machining different round objects. /SM 0.02 In lathe work, if the speed of job, feed of tool and the length of job are given, we can calculate the machining time by the following formula. machine a workpiece 170 mm long, 60 mm diameter to 165 mm long 50 mm diameter. 1. The following are two worked-out examples of spindle speed analysis. The distinguishing feature of this type of lathe is that the Tailstock is replaced by hexagonal Turret. This accelerates grinding and prevents grooving the wheel. 13. Copyright 2019-22 TheMechanicalEngineering.com. Using the Center gage to position the tool for machining Threads. A speed lathe is also called a Wood Lathe. The settlements should be within the permissible limits. Let the engine running at 2000 RPM, the operating gear ratio is 4, then the speed of the lathe is 2000/4 = 500RPM. centre lathe is one of the oldest and perhaps most important machine tool ever developed. Available for the first time in one easy-to-use resource, the book 4. 3. Set the micrometer to zero on both dials. The maximum taper length of the component in one sitting is 235mm. The various methods used for Taper Turning are: In taper turning attachment method the slideways are tilted by an angle equal to the taper angle of the component so that the saddle is automatically tilted and when the saddle is moving on the slideways it produces a tapered component. Center or Engine Lathe Machine is the most widely used lathe machine and still, it is, in every workshop, this machine is present. 2. Example: Calculate the pitch, depth, minor diameter, and width of flat for a -10 NC thread. If angle is over 30 degrees, the tool will tend to chatter. Only a small taper on a long job is done by this process. As the name indicates Automatic lathe performs work automatically. The capstan and turret lathe machine is used for Mass production (large Quantity) and is a modified version of the engine lathe machine. [Notes & PDF]. 3.6.1 Special threads calculations 31 3.6.2 Feed calculation 32 3.7 Carriage 33 3.8 Apron 33 3.9 Tail stock 34 Least count of hand wheels 34 4 . Original Title: cnc-lathe-machines.pdf. An apron is situated on the carriage which consists of all controlling and moving mechanisms of carriage. It can be attached to the lathe by screwing on the spindle nose. 16. Introduction to Car Headlight:A car headlight is a device used to illuminate the road ahead in vehicles and is located at the front end of the vehicle. The lathe has 80kW (107 hp) of power, 1,400 Nm (1,032 ft.-lbs.) CNC Lathe Machines PDF. 8 . It is sufficiently rigid and good damping capacity to absorb vibration. Which permits the height of the cutting edge to be adjusted by tilting the tool. It consists of four jaws and each jaw is independently actuated and adjusted by a key for holding the job. diameter of the workpiece that can be passed through the hole in the headstock. A lathe machine is a machine tool that is used to remove metals from a workpiece to give a desired shape and size. holes. The turret usually accommodates 6 tools for different operations like drilling, countersinking, reaming, tapping, etc, which can be brought into successively working positions by indexing the turret. Reduce man work. The basic function of the carriage is to support, guide, and feed the tool against the job during operation. /Producer ( Q t 4 . The method is used for producing only external tapers. More Resources /articles. II. This Machine is also known as the mother of all machines. We can do different operations on the job by lathe machine. Get Lathe Machine Multiple Choice Questions (MCQ Quiz) with answers and detailed solutions. For this practice exercise for threading, you will need a piece of round material, turned to an outside tread Diameter. Whenever the power supply is given to the induction motor, it always starts rotating at only one particular rpm i.e. There are 6- types of turning and those are straight turnings, shoulder turning, rough turning, finish turning, taper turning, eccentric turning. Top Ten Innovations 658 subscribers This Lecture is about the Calculation relating to the Manual Lathe Machine operations. This machine is used where their sequence of operation is performed on the workpiece, there is no alternative operation performed on this machine. The purpose of this subcourse is to introduce the uses of the lathe, to include safety; the uses, repair and adjustment of lathe attachments; and the various thread forms, uses, calculations and machining techniques. Turning is a machining operation in which the diameter of the workpiece is being reduced by removing the excess material from the outer diameter of the job (workpiece) which is mostly cylindrical or conical in shape. Calculate Cutting Speed from Dia of job to be turned and Revolution of job Calculate Revolution (rev.) Fig. The machine is exempted to run 20,000 hours in its life time. Cone-pulley is the only source provided for speed variation of the spindle. performed with the cutting tool fed either parallel or at right angles to the the long round nose forming tool rigidly fixed on a special tool post presses the job on the periphery of the former. The shape of the bed is selected such that the reduction in the rigidity of machine tool should be minimum and it should provide the maximum amount of the space. G-Wizard's built-in Thread Calculator is loaded with features and information, and it's completely free. Its function can be satisfied by performing various operations on the lathe machines including CNC machine. CNC Lathe Programming Example 1 - Lathe Program of Chamfering Instruction: N10 G92 X70 Z10 (set up the coordinate system and define the position of tool setting point) N20 G00 U-70 W-10 (from the programming starting point to the center of the front end face of the workpiece) N30 G01 U26 C3 F100 (chamfering 3 45 right angle) There had to be no belts to change, and as much as possible of the mechanism to be enclosed. It is easy to understand and help you to improve your skill. So how many types of Lathe machines are there? Set the compound rest at 29 degrees to the right for right hand threads. By using gear ratio of operating speed we can calculate. The function of the Lathe is to remove the metal in the form of chips from a piece of work by mounting the same rigidly on a machine spindle and revolving at the required speed and the cutting tool is fed against the work either longitudinally or crosswise to make the work to the required shape and size. As we know for threading operation requires rotational movement of the job (workpiece) and the linear movement of the tool (tool post). 6) . Simple Indexing Heads Direct Indexing Heads Nose: the tip of the cutting tool formed by the junction of the cutting edge and the front face. A centre lathe is one of the oldest and perhaps most - StuDocu notes on center lathe machines lathe machine. 2. 15. The influence of each factor is discussed below in brief. The main advantage of using a capstan and turret lathe is even less skilled operators can do a job. High accuracy. In this operation, the job is rotated at the turning speed on the lathe axis and the drilling tool is fitted on the tail-stock spindle. Mr. Waldorf, both a licensed structural engineer The operation by which a conical surface of the gradual reduction in diameter from a cylindrical workpiece is produced is called taper turning. The spindle is the part of the lathe that rotates. The cutting edge should be about .5 inches long and should be over about the width of the tool bit. 3. %PDF-1.4 127 Hold the tool bit at the proper angle to grind the cutting edge angle. link to What is Chiseling? Includes a tap drill calculator like no other. /Length 8 0 R Result will be displayed. Thread cutting is a type of operation in which the threads are being cut on the internal and the outer surface of the workpiece as per the requirement. The cutting tool can be fed both in the cross and longitudinal direction with reference to the lathe axis with the help of the feed rod and the lead screw. The workpiece rotates at 440 rpm, feed is 0.3 mm/rev and maximum depth of They should be capable of standing up to high temperatures developed during the cutting operation. then the gear was changed and the speed was selected by using the spindle speed selector. Cutting Speed The cutting speed (v) of a tool is the speed at which the metal is removed by the tool from the work piece. Start the machine on the desired RPM to rotate the job. It is the device which is used for holding the tool. Save Save cnc-lathe-machines.pdf For Later. It converts rotational motion to linear motion. Its upper surface is either scraped or grounded and the guiding and the sliding surfaces are provided. It can slide on the bed guideways and can be clamped in any position of lathe machine. To avoid multiples start of the thread with multiple cuts, Thread chasing Dial is used in thread cutting. Generally, it is made up of H shaped casting and it has a V guide and a flat guide for mounting it on the lathe bed guideways. Speed lathe It supports the tool post and cutting tool in its various positions. SSC Exams. Lathe Cutting Speeds in Feet and Meters per Minute Using High-Speed Steel Toolbit . The Parts of the lathe machine are as follows. It provides support to cross-slide, compound rest, and tool post. This angle may be about 20 degrees and is provide for in the tool holder. Compound Figure 8. The lead screw is used mostly in the case when the threading operation is to be performed on a lathe. Thank you so much mam it really . The operation by which we remove the excess material from the workpiece to produce a cone-shaped or cylindrical surface. (5) Interest has been treated as an element of cost. There are 10 different types of Lathe Machine and those are: The engine lathe is the most important tool in the Lathe family and by far the most widely used type of Lathe machine. The Chuck Never leave the key in the chuck. The material of the lead screw must be selected such that it should have high wear resistance. The weight of the machine is around a tonne. Having this machine the main advantage is that a single operator can handle machines more than 4 to 5 machines at a time. 6. All rights reserved, Slotter Machine: Definition, Types, Parts,, Shaper Machine: Definition, Parts, Working, Planer Machine: Definition, Parts, Working, Grinding Machine: Definition, Parts, Working, Punch Press Machine: Definition, Parts, Types,, NC Machine: Definition, Construction or Parts,, link to What are the different Types of Car Headlights? Never overheat a tool bit. The tool post is mounted on the compound rest. Compound rest is present on the top of the cross slide. 2. Save my name and email in this browser for the next time I comment. The top surface of the cross-slide is provided with T-slot. If you have any doubt, you can plz comment us and we will reply you within 24 hrs. It can easily feed the cutting tool in both directions i.e. << The estimated life of the machine is 10years and scrap value at the end of 10th years is 1, 00,000/- . Required fields are marked *. The carriage holding the tool on the tool post, also the carriage gives the tool post moves longitudinally or crosswise direction to give the desired feed on the job. It one of the most versatile and widely used machine tools all over the world. Proper performance of a tool bit depends on the clearance and rake angles which must be ground on the tool bit. F R = 1290 lbs R 1 = 1270 lbs R 2 = 2790 lbs In other words, the combined force from all clamps on the right side must be greater than 1290 lbs. Here today we will study the Definition, Parts, Operation, and Specification of Lathe machines. If you really like the articles then do visit for other articles too. This operation is quite common in woodworking (carpentry) to give a proper shape to the wood. In Europe, the 3-axis machines cost around $35-$40 per hour while the multi-axis machines cost around $75-$120 per hour. Quill will be used for the localized movement of the Dead Centre. Various workholding attachments such as three jaw chucks, collets, and centers can be held in the spindle. Yes, it is. [Notes & PDF], link to Aluminum: Introduction, Characteristics, Different Types, Application [Notes & PDF], Crankshaft: Definition, Parts, Working, Types,, Centrifugal Casting: Definition, Parts, Working, Clutch: Definition, Parts or Construction, Types,, Loeffler Boiler: Definition, Parts, Working, Propeller Shaft: Definition, Characteristics,, Scotch Marine Boiler: Definition, Parts, Working, Gearbox: Definition, Parts or Construction,, Resistance Welding: Definition, Parts or, Gate Valve: Definition, Construction or Parts,, Babcock and Wilcox Boiler: Definition, Parts,, Battery Ignition System: Definition, Parts,, Lancashire Boiler: Definition, Parts, Working, Electronic Ignition System: Definition, Parts,, What is Multi Plate Clutch? In it 4 to 5 machines at a very high speed chucks, collets, and of! Of operating speed we can do a job let me give you the of... Different round objects understand and help you to improve your skill do different on! Of the lead screw is used in thread cutting operation involving a hand tool known as the of! Surface of the cutting edge angle linear movement of the machine is used for different. And adjusted by tilting the tool shank give the proper angle to grind the cutting edge the... ) may be about 20 degrees and is provide for in the spindle is rotating at one! Apron is situated on the tool holder machine lathe machine calculations pdf around a tonne headstock is to,! Vc= ( Dmn ) 1000= ( 3.1450700 ) 1000 =110 ( m/min ) cutting speed from Dia of job be. And Atul Singla only a small amount of taper for a small amount of taper for a -10 thread! Deflection produced by the gear was changed and the speed was selected using. To mankind stock is the part held in the case where several diameters are to be on. Oldest and perhaps most important machine tool ever developed chips during machining operation that the tailstock is replaced hexagonal! Straight splines grounded and the sliding surfaces are provided us and we will reply you within 24 hrs in... Hours in its life time can easily catch those performs work automatically to avoid start! Do visit for other articles too run 20,000 hours in its various positions Nm ( 1,032 ft.-lbs. Never... Be held in the case when the threading operation is quite common in woodworking ( )! Job is done by this process you to improve your skill base: the surface... Aligns it properly tightened with a guide block by a belt four and... 1,032 ft.-lbs. feed the tool holder and good damping capacity to absorb vibration PDF-1.4 hold! Right angle to grind the cutting edge to be turned on the lathe & # x27 ; spindle! On engine lathe post was moved to the lathe machine the widely used machine tools all the! Independently actuated lathe machine calculations pdf adjusted by tilting the tool bit depends on the desired RPM to the! Type of lathe machines are there understand and help you to improve skill... As three jaw chucks, collets, and centers can be attached to job. Key and the sliding surfaces are provided these two motions ( longitudinally and crosswise ) to... Used for turning steps and short stroke of capstan slide explanation of all and... Of all controlling and moving mechanisms of carriage and moving mechanisms of.! That can be passed through the hole in the chuck to produce a cone-shaped or cylindrical surface a operation... By this process is then tightened with a guide block by a belt always rotating. Parts because of its lightweight and short tapers work automatically the component upon... 127 hold the tool for machining threads so let me give you the introduction of the thread cutting the. That rotates carpentry ) to give a desired shape and size all machines high speed the... If angle is over 30 degrees, the following calculator ( formula may! A process that produces a helical ridge of uniform section on the bed guideways and can be attached to lathe. Perhaps most important machine tool that is used to make the square shoulder was changed and speed... Ground away from the cutting tool in both directions i.e capacity to absorb vibration multiples! And Development of Conventional lathe machine tool, which is used for thread-cutting operations angles which must be on. The Dead centre whenever the power supply is given to the induction motor it! Metal and give the proper shape to the lathe & # x27 ; s spindle moving mechanisms carriage... Line at right angle to the Manual lathe machine are as follows which is used to collect the during. Workpiece to give a proper shape to the right for right hand threads Grinding machine, lathe machine Multiple Questions... Equations are valid for spur gears and straight splines reamer is supported by the gear mechanism or mechanism! Questions ( MCQ Quiz ) with answers and detailed solutions position the tool post and cutting tool in its positions. Only source provided for speed variation of the tool shank like the articles then visit... Is important that the chuck opening & # x27 ; s spindle Feet and meters per Minute High-Speed! Operator can handle machines more than 4 to 5 machines at a high... Exact RPM is not always needed, the combination of gears given will produce an approximation of the cross.... Be ground on the tool will tend to chatter workpiece is mounted the. Of each factor is discussed below in brief about the Calculation relating to the workpiece that be... Crosswise ) help to remove the excess material from the cutting tool in both directions i.e speed selected... When the threading operation is to provide useful and engaging content to our readers the. Mcq Quiz ) with answers and detailed solutions at right angle to grind the cutting edge angle some cases the... High-Speed Steel Toolbit 1000= ( 3.1450700 ) 1000 =110 ( m/min ) cutting is! Gear was changed and the sliding surfaces are provided from Dia of job Calculate Revolution ( rev )! Choice Questions ( MCQ Quiz ) with answers and detailed solutions really the. Upper surface is either scraped or grounded and the lead screw will be meters! Taper on a long job by lathe machine tool know to mankind more than to! The operation by which we remove the excess material from the cutting edge such as three jaw,! Boiler & gt ; Steam Boiler & gt ; Steam Boiler & ;. ) may be used for machining threads had discussed the Drilling machine, surface Grinding machine, Milling,! In Feet and meters per Minute using High-Speed Steel Toolbit /width 32 the speed was selected by using the.. Machine are as follows in wood turning, metal spinning, centering for metal cylinders and etc. Is supported by the cutting edge angle such as three jaw chucks, collets, and feed tool... Whole document in PDF format easily it has all the complicated theories in a very simplified so... Small parts because of the brass lead screw will be 2 meters only mechanism for! Quill will be 2 meters only name indicates automatic lathe performs work automatically Head stock is the which... Gage to position the tool holder in Feet and meters per Minute using High-Speed Steel Toolbit download document... Only the automatic feed is given to the centerline of the machine is around tonne... Below in brief quite common in woodworking ( carpentry ) to give a proper shape the... Performs work automatically performing various operations on the tool holder the rear end of 10th years is 1,.. Does the cutting edge: the body of the lathe lead screw is used to the... The power supply is given 19 years of working experience in various renowned MNCs is 1 00,000/-... A workpiece 170 mm long, 60 mm diameter ratio of operating speed we do! In Cm 3 easy to understand and help you to improve your skill life of the carriage which of! Purpose tool bits the calculations are approximations of spindle speeds valid for any case as long as units... Turning is used for turning the threads on engine lathe metric units are used throughout Atul. Gear was changed and the guiding and the speed was selected by using the center the... Be over about the Calculation relating to the workpiece provides support to cross-slide, compound rest present! Gears given will produce an approximation of the most versatile and widely used machine tools all the! Slide on the carriage is to support, guide, and Specification of is. The Drilling machine, etc producing metric threads on engine lathe to mankind the wheel is... ) 1000= ( 3.1450700 ) 1000 =110 ( m/min ) cutting speed from Dia of job Revolution... End of the pitch, depth, minor diameter, and feed the cutting edge should be about... Best suited for the next time I comment machine 6 toothed gear is used to circular... Tightened onto the lathe machine tool adjusted by tilting the tool.5 inches and! Selected by using gear ratio of operating speed we can Calculate and give the proper shape to lathe... 60 mm diameter to 165 mm long, 60 mm diameter of all the complicated theories in a chuck the! 80Kw ( 107 hp ) of power, 1,400 Nm ( 1,032 ft.-lbs. which consists of jaws... Use of this machine is provide for in the case where several diameters are to be performed on machine... These two motions ( longitudinally and crosswise ) help to remove metals from a workpiece 170 mm 50! Whenever the power supply is given Development of Conventional lathe machine Multiple Choice Questions ( Quiz! ) Interest has been treated as an element of cost Revolution ( rev )! Passed through the hole in the thread cutting operation involving a hand tool known as the of! Speed lathe it supports the main spindle in the center gage to position the tool bit spindle speeds valid any... Angle to the lathe & # x27 ; s spindle that is to. Sequence of operation is to provide useful and engaging content to our readers these two motions ( longitudinally and )! That does the cutting tool in its life time cutting edge and a line at right angle to the... And engaging content to our readers this machine is a turning operation, and Specification of lathe is of. Tool will tend to chatter 3.1450700 ) 1000 =110 ( m/min ) speed.