A777 Metric Cobalt Jobber Drill Bits have a heavy-duty, 135° split point for use when greater heat is generated during drilling, e.g on higher tensile tougher materials and in particular the AEROSOLospace Industry.
Flute Geometry: Standard Helix, Right hand spiral, Thick Web
0.30 mm - 0.95 mm 118° Conical point
1.00 mm to 1.40 mm inclusive 135° 4 facet point
1.50 mm and above 135° split point sizes (Split point geometry to NAS 907 Areospace Specification type P3 Point)
Surface Treatment: Bronze
Material: HSCo Cobalt steel
DIN 338 RN / BS328 / ISO 235
Dormer E500 straight flute taps are the only type of taps that can be used by hand, but they may also be used in a machine if required.
Extremely versatile, can tap through or blind holes in most materials. When tapping blind holes straight flute taps should be used in sets. The three taps which form a set are known by more than one name.
1. Taper or First tap
2. Second or Intermediate tap
3. Bottoming, third or plug tap.
Metric coarse straight flute taps.
Tolerance: Class 2 for 6H Fit
Surface treatment: Bright
Material: HSS High Speed Steel
Chamfer No: 1,2 and 3, Serial no 4 and 5
Flute Geometry: Straight Flutes