Каталог Sumitomo сверла и развертки - страница 116

• Lathe Machining Guidelines
• Drill installation
• Set the drill so that the outer insert is parallel to the machine X axis. (See Fig. 1)

Internal bore smaller Internal bore larger

• Press the end of the flanged of the drill tightly against the face of the holder when tightening the bolt.
• Adjusting work diameter (offset)

Central The work diameter is adjustable by moving the machine X axis. Machine Insert

X axis Peripheral

Insert Make the adjustment by moving the X axis positive (enlarge the bore diameter). Moving the X axis in the negative direction (to reduce the bore diameter) is not recommended as the holder may interfere with the hole. (See Fig. 1)

• The maximum allowable adjustment (offset) differs depending on the drill diameter. Refer to the Radial Offset (Max) in the Holders charts on pages J86 to J92.

Fig. 1

Other notes

• When the drill is mounted on a lathe, the center of the central insert is designed to be 0.15 to 0.2 mm below the center of the spindle.
• If the spindle deviates off center so far that the center of the central insert lies above the spindle center, the central insert will break.
• Set the depth of cut for turning or internal boring work to 1/5 or less of the drill diameter (Max 5 mm or less). (Ex: Set depth of cut to 4 mm or less for a drill diameter of ø20 mm)
• Install a cover to prevent injury from possible chip fly-out (see disc-shaped chip in Figure 2) when through boring

Fig. 2 on a lathe.

• Typical Power Ratings
• Typical Coolant Volume

12 40 f0.24 35 10 For drill diameters ø18.5 to 55 mm, For drill diameters ø13 to 18 mm, coolant pressures of at least 1.0 MPa is recommended.

6 20 lume

d Coolant Vo Recommende 4 15 10

2 5 Minimum Discharge 0 0

• Power ratings are subject to change based on conditions such as work
• Coolant volume is a factor that affects drilling performance,

material and cutting speed and should only be used for reference. particularly with respect to chip evacuation and lubricity.

• Coolant pressure should be set higher for smaller diameter

Cutting Conditions (Reference) drills. (ø18.0 mm or smaller) Work Material: S50C (230HB)

• Coolant volume is usually adjusted by changing the coolant

Cutting Speed: vc=150m/min pressure provided on most CNC machines.

• This table provides guideline values only. More coolant may be required depending on the machine, coolant, and work material.
• Notes on Attaching and Removing Inserts

J Before attaching the insert, remove all traces of foreign matter on the insert seat using air or other means. Proper Wrench Usage Properly Attached Insert

• When using the wrench, align it to the axis of the screw and press while turning.

(Figure 3) If the wrench is not aligned with the screw, the insert screw will be loose Outer InsertOuter InsertOuter InsertOuter InsertOuter InsertOuter Insert Central InsertCentral InsertCentral Insert

and the tip of the wrench and/or the Torx hole of the screw may become deformed.

• Do not allow clearance between the insert seat and drill when attaching the insert. (Figure 4, A) Figure 4 shows a properly attached insert. * It is normal for the outer sides of the central insert to have clearance because it is

Clearance is normal and

Solid clamped at its center, butted to the rear. 䠝 䠝 does not affect use.

Fig. 3 Fig. 4 Special

• Troubleshooting

Indexable

Reamer