KEVOS® MAKEOS · Manufacturing
Angular Cutter or Taper Reamer Fluting Set-up (Head Angle and Indexing)
To flute an angular cutter or taper reamer blank on a dividing head, at what angle do I set the head and what index setting moves between teeth?
Set-up for milling the flutes of an angular milling cutter or taper reamer: the dividing-head setting angle from the number of teeth, the angle of the blank and the angle of the fluting cutter, with the intermediate angles (as the angular cutter fluting tool), and the simple indexing setting between teeth (as the simple indexing tool).
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How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Number of teeth | Number of teeth to cut on the cutter or reamer. | |
| Angle of the blank | ° | Angle of the blank’s conical face. |
| Angle of the fluting cutter | ° | Included angle of the fluting cutter. |
| Dividing head worm ratio | :1 | Worm ratio of the dividing head. |
| Index plates available | choice | Index plates you have. |
Method and formulas
- tan D = cos(360° ÷ N) ÷ tan B; sin E = tan(360° ÷ N) ÷ tan C × sin D; setting angle A = D − E (as the angular cutter fluting tool).
- Angle between teeth = 360° ÷ N.
- Crank turns between teeth = ratio ÷ N (as the simple indexing tool).
- Example: set the head to 21.87° and index 4 turns and 8 holes in the 18-hole circle between teeth.
Limitations
- Handbook set-up for straight flutes on a conical blank.
- Simple indexing only.
- Example values are illustrations. Replace them with values for your actual task.
Typical uses
- Make an angular cutter or taper reamer
- Set the dividing head for fluting a cone
- Check a tooth count can be indexed
Who it is for
- Toolmakers
- Machinists
- Toolroom staff
What you get
- Setting angle and intermediate angles
- Angle between teeth
- Index setting
Interpreting the result
- Check the land width on the first two teeth before cutting the rest.
References
- Machinery’s Handbook, 29th edition (Industrial Press, 2012), printed pp. 833–834, 2107–2121. Topic reference; no source tables or recommended settings are reproduced.
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