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Product Number: 2000-1/2 1/2" Black HSS Jobber

Product Attributes
Packaging   bulk
Diameter (mm)   12.70
Diameter (inch)   1/2
Flute Length (mm)   114
Overall Length (mm)   152
Pack Quantity   5
 
Technical Data
Spindle Speed Stainless Steel RPM   301
Spindle Speed Tool Steel RPM   451
Spindle Speed Cast Iron RPM   602
Spindle Speed Malleable Iron RPM   677
Spindle Speed Med. Carbon Steel RPM   752
Spindle Speed Free Cutting Steel RPM   1078
Spindle Speed Aluminium/Brass RPM   1530
Spindle Speed Wood/Plastic RPM   2282
Feed per revolution mm   0.25
 

9326518001973Bar Code No.
 

 Product Information
Black Finish Jobber Drills (also called blue finish) acheive their distinctive colour by steam tempering, a thermal process resulting in a porous tool coating. This surface helps to keep lubricant on the tool, particularly important on the cutting edges, thus reducing friction and cold welding. The result is increased tool life. Black finish tools are generally recommended for ferrous applications where the oxide layer aids chip flow and heat dissipation.


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