Обший каталог Yamawa 2016 - 2017 - страница 850

25. Trouble Shooting 25.

Troubles Check point Segments

Hardness

Over-cutting of internal thread

Prevent uneven in Prevent over Prevent unbalance

Prevent welding Check cutting condition

feed of tap cutting on thread on entering

Shape

Workpiece

Bored hole

●Provide bigger bored hole.

●Prevent slanting of hole.

●Provide countersinking on the hole entrance.

●Adjust a feed. Machine Feed according to pitch.

●Use tap holder of floating type. ●Reduce cutting speed. Cutting condition

●Use other cutting lubricant

which prevents cold welding. ●Check the viscosity. Lubricant

On process

Provide oxide surface treatment. Selection Use tap with oil hole.

Provide small cutting angle. ●Provide short thread length. ●Reconsider number of flules ●Reconsider length of cutting

of tap. chamfer. ●Adjust chamfer relief angle.

Tap Design Check the width of thread

margin.

●Remove burrs on teeth after ●Provide precise re-sharpening. Care for vibration.

re-grinding. Re-grind ●Provide proper land.

: Most suitable solution : Second most suitable solution