2014-Полный каталог по сверлам EN

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                   APPLICATIONS                                                                                             Round workpiece drilling

Angled face drilling                                                                                                           Workpiece : DIN 42Cr Mo4 (180HB - 280HB)
                                                                                                                                Drill 20 (3D type), Cutting speed : 50, 80, 100m/min
    Workpiece : DIN 42Cr Mo4 (180HB - 280HB)                                                                                    Feed : 0.08mm/rev (initial cutting 0.05mm/rev)
    Drill 20 (3D type), Cutting speed : 80m/min
    Feed : 0.08mm/rev

                                                                     L (max)
                         20

                                         45°
                                             20
                                                                                                                                                                    (11.9)

                                                                                                                            49

Competitor A                 L (mm)                         L (max)                                                                                                11       The inner cutting edge of
Competitor B                  0.11                           Good                                                                                        20                a competitors drill fractured.
                              0.17                           Good
                              0.13           Inner and outer cutting edge fractures

Open sided drilling                                                                                                        Hole diameter oversize (mm)

    Workpiece : JIS S50C (120HB - 180HB), Drill 20 (3D type), Cutting speed : 80m/min Feed : 0.08mm/rev

                                                                                                          Drill oversize (to measured drill diameter)

                                 50
                                                                                                                                      0.2

Coolant pressure (MPa)     100                                                                                                                           0.1                                                                        DRILLING TAF DRILLS
                         19                                                                                                                               0
                                                                                               170
                                                              20                                                                                                                            Competitor A Competitor B

Please ensure the highest rigidity possible exists in both                                                                 Use on a lathe                                 0–0.2mm                 Inner edge face
   machine set up and workholding.                                                                                          (1) The inner cutting edge must                                                      Outer edge

Refer to the following graph for coolant pressure and                                                                          be positioned between 0-
   volume. Coolant is an important factor in the efficient use                                                                  0.2mm over center.
   of these drills.

0.7                                                                                                                                                                         Centre axis Inner edge

0.6                                                                                       50        Coolant volume (l/min)                                                                                              Outer edge
                                                                                          40
                                                                                          30                                (2) To adjust the hole diameter                                                                         APPLICATION
                                                                                          20                                    by off-setting the drill, the
0.5                        Coolant pressure                                               10                                    outer cutting edge and                      Machine X axis
0.4                                                                                                                             machine axis must be set                          Inner edge
                                                                              50                                                parallel.
0.3
                                                                                                                            (3) When producing an oversize hole. The drill offset
0.2 Coolant volume                                                                                                              should be no more than 2% of the diameter. It is not
0.1                                                                                                                             possible to produce an undersized hole.

                             20 30 40                                                                                       (4) When through hole drilling on a lathe the disc produced
                                         Drill diameter (mm)                                                                    by the drill exiting the workpiece may be expelled at
                                                                                                                                high velocity. To reduce the danger of injury or damage
Cannot be used for stack drilling.                                                                                             a cover guard is highly recommended.
   In common with many indexable insert drills, these drills
   produce a round disc on exit which unless evacuated                                                                                                                  Cover
   may cause the drill to fracture.

                                                                                                                                            Disc shape chip                                                                         D175

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