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Shaping tools show a great variety as far as their shapes and dimensions are concerned. Generally all tools (lathe tools) can be used which are also applied for the technique of turning. The straight tool is the most frequently used tool. It can take up great cutting forces, but it has the property to bounce and, thus, to hook into the work.
Figure 3 Straight tool
The offset tool is used, as a rule, for side machining.
Figure 4 Offset tool
The bent tool is used when machining with the straight tool is not possible. Its advantage is a quiet working position. Thanks to this a longer tool life (life between regrinds) and a better surface finish are reached.
The lateral pressing out of the cut which may occur with greater cutting force is of disadvantage.
Figure 5 Bent tool
Forward offset tools are only used, if the tool holder does not allow the use of another tool. It quickly hooks into the work and breaks.
Figure 6 Forward offset tool
Backward offset tools are especially suitable, as they bounce out of the workpiece and, thus, do not hook into it.
Figure 7 Backward offset tool
The shoulder tool is used for machining shoulders. Because of its cutting-edge shape, however, the risk of getting broken is greater on this tool.
Figure 8 Shoulder tool
Pointed or wide-finishing tools are used according to the shape of the workpiece and the surface finish,
Figure 9 Pointed tool
Figure 10 Wide-finishing tool
The distinguishing feature of left-hand and right-hand tools is the position of the primary cutting edge to the person holding the tool.
Figure 11 Position of primary cutting
edge
1 left-hand tool,
2 right-hand tool
The shaper tools can be constructed as solid or compound tools, Apart from a different shape, the basic construction does not differ considerably.
Compound tools are characterized by having tool body and tip body made of different materials.
Figure 12 Compound tools
1 tool body (shank),
2 tip body
The connection between tool body and tip body can be firm (welded-on, soldered-on), but also loose (mechanically held). The mechanically held form shall be given preference due to the quick replaceability.
Figure 13 Mechanically held tool
1 shank,
2 clamping bolt,
3 holder for clamped tool bit,
4 clamped tool bit
Which shaper tools can be used for shaping horizontal and plane
surfaces?
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What does a compound tool consist
of?
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