Lathe installation DRX/DRZLathe installation DRX/DRZ Toolholder DRX

3. Center height adjustment

a) No core remains / Core with Excessively Small Diameter

This happens when the Inner Insert is set above the Center Height.

In this case, adjustment is necessary since insert breakage will be probable

at the center of the drill. (Fig. 7)

(Fig. 7) Insert breakage near the center of the drill

[How to adjust] Initial InstallationInitial Installation 180˚ Rotation Improved Position of Inner InsertImproved Position of Inner Insert

180˚ Rotation (Inner insert positioned higher than normal)(Inner insert positioned higher than normal) (Inner insert positioned lower than normal)(Inner insert positioned lower than normal) 1. Install the drill rotated 180˚. X-axis X-axis Inner edgeInner edge

of the Machineof the machine

Most problems will be solved by this method. (Fig. 8)

Center of spindleCenter of spindle

Center of spindleCenter of spindle

Inner edgeInner edge Inner edgeInner edge Inner edgeInner edgeInner edgeInner edge Center of drill Center of drill Inner edgeInner edge Center of drillCenter of drill Inner edge Inner edgeInner edgeInner edge Zooming near the centerZooming near the center Zooming near the centerZooming near the center

(Fig. 8)

[How to adjust]

adjustCenter HeightCenter he HigherHigher Adjustm 2. If the core diameter becomes too large after the above adjustment, install Moving the Toolment by moving ight the toolent by Center of spindleCenter of spindle KK the drill by rotating 90˚ counter-clockwise as shown in Fig. 9 (Outer insert Inner edgeInner edge is positioned lower) and adjust the center height by moving the tool in LowerLower 90˚ Rotation90˚ Rotation the X-axis direction. (However, this makes it impossible to adjust the drill X-axis of the MachineX-axis of the machine 90°90°

diameter)

Caution: In case of installing the drill in the reverse direction (Outer insert Inner edgeInner edge

is positioned above), the hole diameter will become smaller, which may

cause the drill body to interfere with the drilled hole. Center of drillCenter of drill The best solution is to readjust the center position of the turret itself. Outer edgeOuter edge

Inner edgeInner edgeInner edgeInner edgeInner edgeInner edge Zooming near the centerZooming near the center (Fig. 9) Inner Insert positioned too far below centerInner insert positioned too far below center

b) Core with excessively large diameter (More than 1mm)

This occurs when the inner insert is excessively below the center. This condition causes poor chip evacuation and an adjustment is required.

[How to adjust]

Center HeigCenter LowerLower Adjustment byadjuheight Moving the Toomostment byht Install the drill rotating 90˚ as shown in Fig. 10. (Outer insert is ving the tool positioned on the upper side) and adjust the center height by l Outer edgeOuter edge HigherHigher

moving tool in the X-axis direction.Inner insert is positioned Inner insert is positioned90˚ Rotation
excessively below the center. 90˚ Rotationexcessively below the center.
(However, this makes it impossible to adjust the drill diameter)X-axis X-axis
X-axis X-axisof the Machineof the machine
Caution: In case of installing the drill in the opposite direction (Outerof the Machineof the machine90°90

insert is positioned lower), the hole diameter will become smaller, Outer edgeOuter edge which may cause the drill body to interfere with the drilled hole. The best solution is to readjust the center position of the turret itself. Inner edgeInner edge

Inner edgeInner edge

(Fig. 10)