Tools Used in a Lathe

Tools Used in a Lathe

Tools used in a lathe are classified as follows

Tool Holder & Tool Bit

A. According to the construction, the lathe Machine tools are classified into three types

1. Solid tool

2. Brazed tipped tool

3. Tool bit and tool holders

B. According to the operation to be performed, the cutting tools are classified as

1. Turning tool

2. Thread cutting tool

3. Facing tool

4. Forming tool

5. Parting tool

6. Grooving tool

7. Boring tool

8. Internal thread cutting tool

9. Knurling tool

C. According to the direction of feed movement, the following tools are used

1. Right hand tool

2. Left hand tool

3. Round nose tool

LATHE CHUCKS

LATHE MACHINE

Workpieces of short length, large diameter and irregular shapes, which can not be
mounted between centers, are held quickly and rigidly in chuck.There are different types of
chucks namely, Three jaw universal chuck, Four jaw independent chuck, Magnetic chuck,
Collet chuck and Combination chuck.

a) Three Jaw Self-Centering Chuck

b) Four Jaw Independent Chuck

c) Magnetic Chuck

Three Jaw Self-Centering Chuck

The three jaws fitted in the three slots may be made to slide at the same time by an
equal amount by rotating any one of the three pinions by a chuck key.This type of chuck is
suitable for holding and rotating regular shaped workpieces like round or hexagonal rods
about the axis of the lathe. Workpieces of irregular shapes cannot be held by this chuck.

The work is held quickly and easily as the three jaws move at the same time.

Three Jaw Self Centering Chuck

Four Jaw Independent Chuck

There are four jaws in this chuck. Each jaw is moved independently by rotating a
screw with the help of a chuck key. A particular jaw may be moved according to the shape
of the work. Hence this type of chuck can hold woks of irregular shapes. But it requires
more time to set the work aligned with the lathe axis. Experienced turners can set the work
about the axis quickly. Concentric circles are inscribed on the face of the chuck to enable
quick centering of the workpiece.

Four Jaw Independent Chuck

Magnetic chuck

The holding power of this chuck is obtained by the magnetic flux radiating from the electromagnet placed inside the chuck. Magnets are adjusted inside the chuck to hold or release the work. Work pieces made of magnetic material only are held in this chuck. Very small, thin and light works which cannot be held in an ordinary chuck are held in this chuck.

Magnet Chuck

Preet Lathe offers all of the above chuck fitted as well as standalone. Our range of All Geared Lathe Machine & Conventional Cone Pulley Lathe comes along with these chucks.

Horizontal Boring Machine

Horizontal Boring Machine

Preet Lathe has stepped up in the stream of machinery and looking forward to extend it more. We

have introduced PREET " Horizontal Boring Machine" with utmost feature and depending upon our same

technology to give the same output i.e. Accuracy with High Precision Engineering.

Here is first look of us as Horizontal Boring Machine Manufacturer.

Heavy Duty Lathe

Heavy Duty All Geared Lathe

Heavy Duty All Geared Lathe are famously known as Roll Turning Lathe because of their sizes, Big Bore & mainly Center Height. Heavy Duty Lathe Manufactured by Preet Lathe comes along with Taper Bed which means it gives more stability, least Vibration and Low RPM to cultivate Heavy Jobs.

In this video, machine has All Geared Headstock which gives an ease while changing the speed of the chuck or in other words to control the RPM. It had 18 different speeds, which in returns helps to choose the speed of the choice.

Thread Cutting on Lathe

Thread Cutting

Thread cutting on All Geared Lathe Machine is one of the most important operations performed in a lathe. The process of thread cutting is to produce a helical groove on a cylindrical surface by feeding the tool longitudinally.

Thread Cutting On All Geared Lathe

 1. The job is revolved between center or by a chuck. The longitudinal feed should be
equal to the pitch of the thread to be cut per revolution of the work piece.

2. The carriage should be moved longitudinally obtaining feed through the lead-screw
of the lathe.

3. A definite ratio between the longitudinal feed and rotation of the headstock spindle
should be found out. Suitable gears with required number of teeth should be mounted on the
spindle and the lead screw.

4. A proper thread cutting tool is selected according to the shape of the thread. It is
mounted on the tool post with its cutting edge at the lathe axis and perpendicular to the axis
of the work.

5. The position of the tumbler gears are adjusted according to the type of the thread

6. Suitable spindle speed is selected and it is obtained through back gears.

7. After the process of thread cutting is over, the thread is checked by suitable
gauges.

Taper Turning Attachment

Taper Turning Attachment in Lathe 

The advantage of this method is that long tapers can be machined & is offered by Preet Lathe . As power feed can be employed, the work is completed at a shorter time. 

Preet Lathe manufacturers taper attachment consists of a bracket which is attached to the rear end of the lathe bed. It supports a guide bar pivoted at the center. The bar having graduation in
degrees may be swiveled on either side of the zero graduation and set at the desired angle
to the lathe axis. A guide block is mounted on the guide bar and slides on it. The cross slide
is made free from its screw by removing the binder screw. The rear end of the cross slide
is tightened with the guide block by means of a bolt. When the longitudinal feed is engaged,
the tool mounted on the cross slide will follow the angular path as the guide block will slide
on the guide bar set at an angle of the lathe axis. The depth of cut is provided by the compound
slide which is set parallel to the cross-slide. All Geared Lathe Machine are offered with Taper Turning Attachment.

All Geared Lathe & Semi Geared Lathe

Difference in All Geared Lathe Machine & 

Semi Geared Lathe Machine

There is huge difference between All Geared Lathe & Semi Geared Lathe Machine. Buyer need to see the difference between both the machines, when they are looking to buy it. Below are the difference between them:

All Geared Lathe Machine

Semi Geared Lathe Machine

• Appearance: There is major difference in the appearance . After looking at the Head Stock, we can easily judge the machine whether it is All Geared Lathe or Semi Geared Lathe.
• Spindle Speeds: With the difference in the Head Stock, same applies to the speed of the All Geared Lathe Machine & Semi Geared Lathe. All Geared Lathe comes with 8, 12, 16, 18 or more spindle speeds while Semi Geared comes with 6 spindle speeds. 
• Operation: In Semi-Geared Lathe, the V Belts are required to be slipped from one pulley to another manually while in All Geared Lathe Machine, the belts are not required to be slipped. It is fully operational from Head Stock Front Levers. Machine Video is available at http://www.youtube.com/watch?v=8l6465yRlQ4  
• Head Stock Gears: There is high difference in the making of the head stock as there are number of gears are linked to each other in All Geared Lathe which is not in the Semi geared lathe. All the gears are induction hardened in the Head Stock whereas it may or may not be hardened gears in the Head Stock of Semi Geared Lathe.

These are the few differences in both the machine and at the same time there is a difference in the Lathe Machine Price as well. Due to the major difference in the making of the machine, there lies difference in the price
 as well. A buyer need to have a look at the above mentioned difference before they buy the machine for their industry. So depending upon the requirement, a buyer can chose the machine to buy.

Lathe Centers

Centers

Centers are useful in holding the work in a lathe between centers. The shank of a
center has Morse taper on it and the face is conical in shape. There are two types of centers
namely
(i) Live center
(ii) Dead center

Holding Work Piece Between the Centers

The live center is fitted on the headstock spindle and rotates with the work. The
center fitted on the tail stock spindle is called dead center. It is useful in supporting the other
end of the work. Centers are made of high carbon steel and hardened and then tempered.
So the tip of the centers are wear resistant. Different types of centers are available according
to the shape of the work and the operation to be performed. They are Ordinary center, Tipped center, Revolving center. Lathe Machine Manufacturer Preet Lathe Udyog offers Dead Center/Ordinary Center as standard accessories along with the Lathe Machine and other centers as optional.