# Feed rate

Normally a feed cassette can define two different feed rates. By turning the feed cassette 180 degrees you can change the feed rates, as shown in the figure below. The feed rate of the drill must be balanced with the spindle speed. Select from the available combinations of feed rates in the table below to get the desired feed rate.

New feed cassette
Old feed cassette

|  | Feed cassette
--- | --- | ---
IPR | mm/rev | Ordering No.
0.0007 | 0.017 | 4141 0428 95
0.0011 | 0.028 | 4141 0428 91
0.0015 | 0.038 | 4141 0428 96
0.0021 | 0.054 | 4141 0428 97
0.0028 | 0.071 | 4141 0428 93
0.0037 | 0.093 | 4141 0428 94
0.0045 | 0.115 | 4141 0428 93
0.0052 | 0.13 | 4141 0428 97
0.0059 | 0.15 | 4141 0428 96
0.0064 | 0.16 | 4141 0428 91
0.0068 | 0.17 | 4141 0428 95