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Brand:

Conboom:

Product name:

M35 Cobalt Twist Drill Bits Set:

Material:

HSS-Co M35 Cobalt:

Size (optional):

13PCS:

1.5, 2.0, 2.5, 3.0, 3.2, 3.5, 4.0, 4.5, 4.8, 5.0, 5.5, 6.0, 6.5 mm

19PCS:

1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0mm

25PCS:

1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0mm

Measurement System:

Metric:

Shank Type:

Straight Shank:

Quantity:

13/19/25PCS + Metal Case:

Diameter (mm):

Total length (mm):

Working length (mm):

Suggested RPM:

1 34:

12:

3000:

1.5:

39:

17:

2400:

2 48:

22:

1800:

2.5:

55:

30:

1600:

3 62:

33:

1400:

3.5:

69:

38:

1200:

4 74:

44:

1000:

4.5:

79:

48:

900:

5 86:

52:

800:

5.5:

93:

58:

750:

6 93:

58:

700:

6.5:

100:

64:

650:

7 109:

70:

600:

7.5:

109:

70:

550:

8 116:

75:

500:

8.5:

116:

75:

450:

9 125:

83:

400:

9.5:

125:

83:

325:

10:

133:

90:

350:

Note:

Cobalt drill bits require slow RPM when drilling metals. the suggested RPM is only for your reference. It may vary from different materials. You can start from a lower RPM and adjust it higher slowly. Once the bit can get into the workpiece. the adjustment should be stopped.:

Features:

M35 cobalt. Quality M2 HSS with 5% cobalt added for higher hardness and heat-resitance. the Rock-well hardness is up to 67. It can cut faster and has a long life, up to 12 times compared with the average HSS bit. :