- Why is proper cutting speed important?
- What is the purpose of a dead Centre?
- What is the difference between a live center and a dead center when these terms are used in the context of workholding in a lathe?
- What is live Centre in lathe machine?
- What are the four types of tool post?
- What is a lathe dog used for?
- What is a bottom dead center?
- How is the work mounted on centers?
- What is the difference between rough turning and finish turning?
- What is Centre height of lathe?
- What is meant by Straight turning?
- What does dead center mean?
- What is a live tailstock?
- Why is top dead center important?
- What stroke is top dead center?
- What is the difference between a live center and a dead center?
- What will happen if center drill is not used before starting a drill?
- What will happen to the workpiece when turned if it is held between centers and the centers are not exactly in line?
- How do you attach a cutting tool on a lathe?
Why is proper cutting speed important?
Cutting speed is defined as the speed at which the work moves with respect to the tool (usually measured in feet per minute).
Feed rate is defined as the distance the tool travels during one revolution of the part.
Cutting speed and feed determines the surface finish, power requirements, and material removal rate..
What is the purpose of a dead Centre?
A dead center (one that does not turn freely, i.e., dead) may be used to support the workpiece at either the fixed or rotating end of the machine. When used in the fixed position, a dead center produces friction between the workpiece and center, due to the rotation of the workpiece.
What is the difference between a live center and a dead center when these terms are used in the context of workholding in a lathe?
What is the difference between a live center and a dead center, when these terms are used in the context of work holding in a lathe? … The centers you refer to are used in the tailstock of a lathe to support the free end of a workpiece. The other end is clamped in the chuck.
What is live Centre in lathe machine?
Live or revolving center A live center or revolving center is constructed so that the 60° center runs in its own bearings and is used at the non-driven or tailstock end of a machine. It allows higher turning speeds without the need for separate lubrication, and also greater clamping pressures.
What are the four types of tool post?
Lathe Machine Tool Post and it TypesQuick Release Tool Post.Index Tool Post.Pillar Type Tool Post.Clamp Type Tool Post.Turret (4-Way) Tool Post.Super Six Index Turret 1. Quick Release Tool Post This tool post is currently gradually more used. An infinite number of tools conduct is preset in the holders prepared for use.
What is a lathe dog used for?
Lathe Dog is also widely known as Lathe Carrier. It is a device made up of Iron Cast that is used to provide a firm connection between the workpiece and headstock spindle mounted between the centre. It clamps around the workpiece and allows the machine spindle rotary motion to be transmitted to the workpiece.
What is a bottom dead center?
Bottom dead center is the point at which the piston of an engine is nearest to the axis of the crankshaft. On a vertical engine, this is the lowest point that the piston reaches. … During the compression stroke, the piston moves up from bottom dead center.
How is the work mounted on centers?
CENTERING THE WORK. To center round stock where the ends are to be turned and must be concentric with the unturned body, mount the work on the head spindle in a universal chuck or a draw-in collet chuck If the work is long and too large to pass through the spindle, use a center rest to support one end.
What is the difference between rough turning and finish turning?
A roughing operation is used to remove large amounts of material rapidly and to produce a part geometry close to the desired shape. A finishing operation follows roughing and is used to achieve the final geometry and surface finish.
What is Centre height of lathe?
212-250 mmMedium Duty Lathe Machine, Height Of Centre: 212-250 MmHeight Of Centre212-250 mmMax Swing Over Bed410-490 mmMax Swing Over Slide240-320 mmSpindle Nose6 TPIPower Required2 HP
What is meant by Straight turning?
[′strāt ′tərn·iŋ] (mechanical engineering) Work turned in a lathe so that the diameter is constant over the length of the workpiece.
What does dead center mean?
The dead center is the position of an engine’s piston when it is at the very top or bottom of its stroke. The maximum travel of the piston between the two dead centers is the stroke.
What is a live tailstock?
A tailstock, also known as a foot stock, is a device often used as part of an engineering lathe, wood-turning lathe, or used in conjunction with a rotary table on a milling machine. … A tailstock has a Dead Center, while headstock has Live Center.
Why is top dead center important?
Finding Top Dead Center (TDC) is an essential skill for assembling and tuning engines; and is even a necessity for performing some engine diagnostic tests, such as a cylinder leak down test.
What stroke is top dead center?
four-strokeThere are many reasons why you might need to find an engine’s top dead center. Top dead center is the point when the piston of the number one cylinder in an engine is at its highest point, and on the compression stroke of the engine’s four-stroke cycle.
What is the difference between a live center and a dead center?
A live center is mounted in bearings and rotates with the work, while a dead center does not rotate – the work rotates about it. Live center Rotates while dead centre center does not rotate..
What will happen if center drill is not used before starting a drill?
Without using a pre-center drill hole, the initial point of engagement is seated on the chisel edge. The cutter may therefore slip on the workpiece and consequently angular drill holes may be generated. In addition, tool break may be observed in the case of using brittle cutters (such as WC).
What will happen to the workpiece when turned if it is held between centers and the centers are not exactly in line?
What will happen to the workpiece when turned, if held between centers, & the centers are not exactly in line? it will lead to tapered surfaces rather than cylindrical surfaces. there will be uneven contact between the workpiece and the cutting tool.
How do you attach a cutting tool on a lathe?
The Setup Process. … Step 1: Ensure Safety! … Step 2: Get the Right Tool. … Step 3: Mount the Workpiece into the Lathe. … Step 4: Install the Cutter Tool. … Step 5: Set the Ruler in Position. … Step 6: Take A Test Cut. … Step 7: Final adjustments.More items…