KEVOS® MAKEOS · Manufacturing
Dividing-Head Angle for Milling Clutch Teeth
At what angle must the dividing head be set to mill these saw-tooth or V-shaped clutch teeth?
Dividing-head (blank inclination) angle for milling saw-tooth clutch teeth with a single-angle cutter or V-shaped teeth with a double-angle cutter so that the tooth tops and bottoms converge to the centre, and the indexing for straight-tooth clutches.
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How this tool works
Inputs, units and where to find them
| Input | Unit | Typical source |
|---|---|---|
| Tooth form | choice | Tooth form and cutter type. |
| Number of teeth | Number of clutch teeth. | |
| Cutter angle (single) or included angle (double) | ° | Angle of the single-angle cutter, or the included angle of the double-angle cutter. |
Method and formulas
- Single-angle cutter: cos α = tan(360° ÷ N) × cot θ ÷ 2.
- Double-angle cutter: cos α = tan(180° ÷ N) × cot(θ ÷ 2) ÷ 2.
- α is read on the dividing-head graduations; straight-sided teeth are milled with the head vertical, the cutter side on the centre line, and an odd number of teeth lets one pass finish two tooth sides.
- Example: 5 saw teeth with a 60° cutter need the head at 27° 19.2′.
Limitations
- Valid only when the formula gives a real angle; small tooth counts with steep cutters are impossible.
- Check the narrow end of the tooth space against the cutter width.
- Example values are illustrations. Replace them with values for your actual task.
Typical uses
- Set up a dividing head to mill a jaw or dog clutch
- Check the head angle for a replacement clutch part
- Choose cutter angle and tooth count together
Who it is for
- Machinists
- Toolmakers
- Maintenance fitters
What you get
- Dividing-head angle
- Angle between teeth
- Setting notes
Interpreting the result
- Converging tops and bottoms let the mating clutch engage across the whole tooth width.
References
- Machinery’s Handbook, 29th edition (Industrial Press, 2012), printed pp. 2452–2454. Topic reference; no source tables or recommended settings are reproduced.
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