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Our offices will be closed on Monday, May 29th, in observance of Memorial Day. FedEx paid priority & FREE delivery orders placed before 5:00PM ET on Friday, May 26th will ship same day (if paid for by CC or PO account in good standing). FedEx/UPS ground & freight orders have a 1:00PM ET cutoff. Orders placed after the Friday cutoff times will ship on Tuesday, May 30th.
RUKO jobber length twist drill bits provide fast and clean cutting for many materials, including stainless steel. High-speed steel (HSS), 5% cobalt high-speed steel (HSSE-Co5), and titanium nitride (TiN) coated high-speed steel drill bits are available in up to 1/2 inch or 13mm sizes.
These high performance twist drill bits are available in three different materials and are suitable for all normal drilling
in conventional materials.
The HSS ground twist drill bit is made of heavy-duty
The fully ground twist drill bit has a more precise
HSS-Co drills are ideally suited for materials that are
especially difficult to drill such as stainless steel and for
higher chip loading.
HSS-TiN drill bit models add a titanium nitride coating,
to increase the surface hardness to approximately 2300 HV and the
heat resistance to 1100°F (600°C).
The Titanium Nitride coating also provides longer tool
life with increased cutting speeds.
Point Cut: 1/8" dia. with split point DIN 1412 C
Point angle: 118°
Helix angle: 20° to 30°
Use HSS, HSS-Co and HSS-TiN coated drills for:
Steel and stainless steel
Alloyed and unalloyed cast iron (up to strength of 13,000
Grey, malleable, ductile and die-cast iron
Sintered iron, nickel silver, graphite
Short chipping aluminum alloys
Brass and bronze
Black & Gold Jobber Length Drill Bits
These high performance twist drills are suitable for all normal drilling in conventional materials. High Speed Steel bits with 5% Cobalt
alloy (HSS-Co5) and a black oxide surface treatment on the bevel decreases cutting forces and increases wear resistance of the bit.
Point Cut: from 1/16" dia. with split point
DIN 1412 C
Shank: 5/32 and larger, three-surface shank
Point angle: 135°
Helix angle: 40°
Right hand cutting
(pack of 10)
For part listing and specifications, go to Shop Now