Boring Tools Cutting Data Tables

Cutting data DV/BT50, HSK-A100, Capto C8

Ø 15-620/670

With the exception of the diameter range 15 - 22 mm (page 38/39), which is covered by the fine boring heads EW 15 and EW 18, there is cutting data of one specific diameter range on each double page, which corresponds to the size of the rough- and the fine boring head. For the diameter range bigger than 200 mm, the data is valid for light weight boring tools series 318.

The diameter ranges shown in the headline of each page will be reached for rough boring with a second pair of insert holders and for fine boring with additional insert holders size 2 and size 3.

The maximum values of the cutting data given in the tables require spindle speed of 12 500 rpm and spindle power of approx. 38 kW. In case of lower available speeds and spindle power, the cutting data has to be adapted accordingly.

The cutting data is valid for rough boring heads type SW, and for the fine boring heads type EWN, EWB/EWB-UP and EWE. The max. permissible cutting speeds to operate these heads are listed below and may not be exceeded at any time: Rough boring heads type SW: 1200 m/min Fine boring heads EWN/EWE: 1200 m/min Balanceable fine boring heads EWB/EWB-UP: 2 000 m/min

In the table the following terms and dimensions are used:

Workpiece material: Material no. according to DIN or generally used designation Boring depth X: Projection length according to picture 1 and picture 2 Insert:

Detailed information about the inserts is shown in the BIG KAISERmain catalogue.


Nose radius Cutting speed




Stock allow.:

Sock allowance per cut in Ø



Feed per revolution



Surface roughness (Ra 1.6 µm for N7) Rotationally symmetrical rough boring


page 7 page 7 page 8

Double offset rough boring Full profile rough boring

Diameter-length ratio For long tool assemblies with different boring bar diameters, the boring depth X may not be the decisive factor for the cutting data to be ap- plied, but the total tool length. Should the diameter-length ratio in relation to taper gauge diameter be bigger than 1:6, the lowest cutting data (highest X-value) has to be applied.




Picture 1

Picture 2

Boring depth X including the useable length of the tool shank and the boring head.

Boring depth X including the useable length of the reduction and the corresponding boring head.


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