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Setting up correctly Different types and their use

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Lathe Tools. Setting up correctly Different types and their use. Setting Lathe Tools up Correctly. It is essential that lathe tools are set at centre height to ensure they cut correctly and produce the desired finish. - PowerPoint PPT Presentation

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Page 1: Lathe Tools

Setting up correctlyDifferent types and their use

Page 2: Lathe Tools

It is essential that lathe tools are set at centre height to ensure they cut correctly and produce the desired finish.

The tool is set to the correct height by rotating the tool post round and lining the tool up with a centre located in the tail stock as in example.

The height can be adjusted by means of the adjuster screw on the top of the tool post.

Page 3: Lathe Tools

The Facing Tool can be either straight or cranked.

They are used essentially for traversing across the end of the material as shown to produce a flat smooth datum end.

It can also be used to take very light finishing cuts along the diameter providing a straight shoulder is not required.

It will also produce a good finish if used for the finishing cut when taper turning.

Page 4: Lathe Tools

Knife Edge tools can be either right or left handed as shown.

They are used essentially for traversing along the work piece to remove small to medium amounts of material from the diameter to produce steps.

As the cutting edge is almost 90 degrees they will produce a square shoulder.

They can also be used to face the end of the work piece but facing tools are preferred.

Page 5: Lathe Tools

The boring tool can be of the radius type or square edge.

It is used for removing material from the centre of the work piece to produce a bore / hole.

Before a boring tool can be used the end of the work piece needs to be opened up by drilling a hole in the end.

This is achieved by mounting the drill in the tailstock as shown

Page 6: Lathe Tools

There are two types of Radius or forming tools

External radius tools used to produce an external radius or circle on the edge or end of the work piece.

Internal radius tools for producing an internal radius or round groove in the work piece

Page 7: Lathe Tools

Chamfering tools can be either single or double sided and are normally ground at 45 degrees

They have two main uses

1) They can be used to produce a short taper of fixed angle e.g. 45 degrees.

2) They are more commonly used to remove sharp edges from the work piece

Page 8: Lathe Tools

The Parting off Tool is used to cut a finished piece of work off a length of stock bar when turned on the lathe.

The parting tool is narrow and great care needs to be taken when using one.

It is essential that it is set up at right angles to the work to avoid it rubbing on the side of the tool which will cause it to shatter.

The tool is feed traversely across the lathe using the cross slide into the work piece at a steady continuous rate until it reaches the centre of the bar when the work piece parts off from the stock bar.

Page 9: Lathe Tools

The grooving / undercutting tool is plunged into the diameter of the material to produce a square flat bottomed groove in the work.

When using the grooving tool it is essential to ensure it is set up at right angles to the work to prevent the side of the tool rubbing on the side of the groove.

Page 10: Lathe Tools

The screw cutting tool as the name suggests is used for cutting a screw thread on the diameter of the material.

The metric screw cutting tool as shown is ground at 60 degrees imperial tools are ground at 55 degrees.

The tool is passed along the material at the correct speed depending on the pitch using progressive cuts at small depths until the correct depth of thread is reached.

Page 11: Lathe Tools

The Knurling Tool is used to produce either a single cross cut or double cross cut (diamond) pattern on the work piece, this is usually to aid with grip of the component when in use.

There are three different types of knurling tool, the one shown opposite is the plunge type and is used on larger diameter material.

There are also three grades of knurl, fine medium and course.

The plunge type knurling tool as the name suggests is plunged into the diameter as shown

Page 12: Lathe Tools

The calliper type knurling tool shown opposite is used by placing the wheels above and below the centre of the material as shown below.

The handle at the top is then rotated until the wheels just come in contact with the material and start rotating.

The pressure is then applied by lifting the lever on the side up to around 45 degrees as shown.

This type of knurling tool is used on small diameter material as it grips the material rather than pushing against the side like the plunge type which could cause the material to bend.

Page 13: Lathe Tools

The clamp type Knurling tool operates in a similar way to the calliper type by applying pressure to the material in a grip type motion.

The method of applying the pressure is by rotating the nut or thumb wheel on the top until the required finish is achieved.

With all three types when pressure is applied the tool is fed along the work to the desired length.

It is sometimes necessary to take more than one pass along the material to achieve desired finish.