2510. Recommendations for application and operation10.1 Swivelling of the milling headIn order to produce bore holes and chamfering at an angle which diverges from the normal verticalposition of the milling head, the milling head can be swivelled up to 90° either to the right or to theleft.If an adjustment is intended please proceed as follows:After loosening (turn to the left) the lock nut (part-no. 7) turn the hexagon nut as far to the rightagainst the housing of the tool spindle until the index pin (part-no. 4) can be pulled out by hand.Loosen both the high nut (part-no. 19) and the hexagon nut (part-no. 21) on the vertical slide bythen turning to the left.Now the milling head can be swivelled to the desired degree to the left or to the right. In order to fixthe milling head in this position, tighten both the high nut and the hexagon nut again.In order to bring the milling head back to its normal position, loosen the high nut and the hexagonnut on the vertical slide and bring the vertical slide back to its upright position.After turning back the hexagon nut on the index pin, the latter can be pushed into the opening in thework spindle housing by hand. Now, both the hexagon nut and the lock nut of the index pin as wellas the hexagon nut and the high nut on the vertical slide can all be tightened.