Following are the List of Lathe Attachments
- Taper Turning Attachment for Lathe
- Milling Attachment for Lathe
- Grinding Attachment for Lathe
- Gear Cutting Attachment for Lathe
- Spherical Turning Attachment for Lathe
- Copying Attachment for Lathe
1. Taper Turning Attachment for Lathe
Many modern lathes have a taper bar fitted at the back of the bed. This can be set to different angles to the spindle axis. The bar carries a sliding block which, during taper turning, is attached by a link to the back of the cross-slide. The lead screw of the cross-slide is released so that it no longer controls the setting of the depth of cut and the slide is now free. When the saddle is moved along the bed, the cross-slide follows the taper bar, so that the tool moves parallel to the bar and a taper is produced. The top slide is swung through 90° to lie at right angles to the work so that it can be used to apply the depth of cut.
The length of the taper bar enables accurate settings to be carried out, with the help of the degree scale with an angle vernier incorporated. The taper is produced by the movement of the saddle under power feed, giving improved and controllable surface finish and a long taper is possible. It is, however, limited to the half-included angle of the taper of about 15° (30° included angle).
2. Milling Attachment for Lathe
This attachment is fitted on to the cross-slide of a lathe in the place of the compound rest. The Milling attachment holds the job at right angles to the milling cutter,which is mounted in the chuck or collet. In the other type of attachment , the workpiece is held between centres. The milling cutter and the indexing head are mounted on the compound rest. It is provided with a driving unit. Both these attachments have provisions to feed in all the three directions, and it is, therefore, possible to perform operations like keyway cutting, angular milling, Tee slot cutting, and thread milling etc.
3. Grinding Attachment for Lathe
With the help of a good electric grinding attachment the lathe can be used for re-sharpening reamers and milling cutters, grinding hardened bushings and shafts, and many other grinding operations.
The V bed ways of the lathe bed should be covered with a heavy cloth or canvas to protect them from dust and grit from the grinding wheel, and the lathe spindle bearings should also be protected. A small pan of water or oil placed just below the grinding wheel will collect most of the grit.
A large, powerful grinder is most satisfactory for external grinding. The wheel should be at least 100mm in diameter and the grinder should be mounted directly on the compound rest of the lathe.
4. Gear Cutting Attachment for Lathe
The gear cutting attachment mounted on the lathe will cut spur and bevel gears. It may also be possible to do linear indexing, external keyway cutting, splining, slotting and all regular dividing head light milling works.
This attachment is very useful for cutting small gears and work involving light machining.
5. Spherical Turning Attachment for Lathe
This attachment is mounted on the cross-slide, and operates by a hand wheel rotating the top slide and tool through a worm and worm wheel. The turning tool is set by using slip gauges between the tool and a test bar fitted.
6. Copying Attachment for Lathe
The copying attachment is generally fixed to certain standard centre lathes. This attachment works on the hydraulic system. Copying lathes are used to produce a particular type of jobs in large quantity.
The job is held on a chuck or between chuck and centre or in between centres. A masterpiece of the job to be produced is held separately parallel to the job axis. The cutting tool used for turning the job is connected to a stylus (tracer) which is switched on and the automatic feed is engaged when the stylus will move from the tail join stock to the headstock with an upward pressure. Since the stylus is in contact with the outer surface of the master piece, the movement of the stylus is guided by the shape of the masterpiece. Hence, similar pieces can be produced in large quantities with the help of the copying attachment.
Uses of the copying attachment.
– The attachment is used for form turning.
– It is used to produce a large number of duplicating parts.
– It is useful in production shops.