Alpen HSS Cobalt Jobber Drills - DIN 338 RN

5% cobalt-alloyed jobber drills with high heat-resistance for drilling steels with tensile strength over 800 N/mm², specially suitable for high alloyed steels, bearing-steels, hot/cold-rolled steel. Suitable for stainless steel.

Features

• Self-centering thanks to special point shape
• Drilling even with the highest thermal stress - up to 600° C
• Due to special drill grinding fast drilling progress and up to 50% less feed pressure required

HSS steel: toughness and precision combined with excellent cutting efficiency for drilling alloyed carbon and plain steel. Ideal for hand held operations.

Technical information

• Point shape: split point C, 130°
• DIN 338 RN

Diameter (mm)	General length/Length of the drilling part (mm)	Rpm
1.0	34/12	3820
1.5	40/18	2546
2.0	49/24	1910
2.2	53/27	-
2.5	57/30	1528
3.0	61/33	1273
3.2	65/36	1194
3.3	65/36	1194
3.5	70/39	1091
3.8	75/43	1194
4.0	75/43	955
4.2	75/43	-
4.5	80/47	849
5.0	86/52	764
5.2	86/52	-
5.5	93/57	694
6.0	93/57	637
6.5	101/63	588
7.0	109/69	546
7.5	109/69	509
8.0	117/75	477
8.5	117/75	-
9.0	125/81	424
9.5	125/81	-
10	133/87	382
10.5	133/87	-
11	142/94	-
12	151/101	318
13	151/101	-