Technical data:
Nominal ⌀ DC:28 mm
Coating:uncoated
Tool material:HSS
Standard:DIN 345
Type:N
Tolerance nominal ⌀:h8
Point angle:118 degrees
Helix angle:20-30 degrees
Shank:Morse taper
Number of cutting edges Z:2
Through-coolant:no
recommended maximum drilling depth L2:128 mm
Flute length Lc:170 mm
Overall length L:291 mm
Morse taper MT size:3
Feed f in steel < 750xa0N/mm2:0.25 mm rev. Colour ring:without Type of product:Jobber drill Version: Special surface treatment, resulting in reduced tendency to edge build-up and improved chip evacuation.Top quality high performance twist drills.Cutting edge section ≤ 26.5 mm ⌀ ground from solid, > 26.5 mm ⌀ milled. This ensures high concentricity and pitch accuracy, and precision ground point up to 40 mm ⌀.With shape A point.
Recommendation:
Maximum drilling depth:L2 = LC – 1.5 × DC.
Note:
For suitable reducing adapters for tools with MT shanks see No. 343000-343530.