Sutton 1/16" D108 Cobalt Jobber Drill Bit - HSS-Co

The Sutton D108 is a cobalt jobber drill made from high speed steel with a 5% cobalt formula. It has a colour-tempered finish, a 135° split point on metric sizes from 3.5 mm and imperial sizes from 1/8 in, a parallel shank and a thick core.

It is an industrial quality drill for materials of higher hardness and tensile strength, such as cast iron, bronze, hardened steel and stainless steel.

This is the fractional-inch range: 29 sizes from 1/16 to 1/2 in, with flute lengths of 20 to 101 mm and overall lengths of 43 to 151 mm. Each size is shown with its fraction first and its millimetre equivalent. Working to a different size system? The same drill is also listed as a metric range.

Where this product is used

• Materials of higher hardness and tensile strength, such as cast iron, bronze, hardened steel and stainless steel.
• Applications for the range include: DIY, trade, automotive, electrical, plumbing, carpentry, general contracting, woodworking, metalworking, machine shop and MRO work.

Design features

• Cobalt alloyed: the 5% cobalt formula improves abrasive and heat resistance, for increased strength at higher drilling temperatures.
• Colour-tempered finish: enables identification of cobalt drills.
• 135° split point on metric sizes from 3.5 mm and imperial sizes from 1/8 in: enables accurate positioning and less drilling pressure.
• Parallel shank: precision engineered for accurate hole size.
• Thick core: increased rigidity in hard materials.

Finish

Colour-tempered finish. It enables identification of cobalt drills.

Sizes and lengths

Diameters, overall lengths and flute lengths are shown below. Lengths are in millimetres.

Key specifications

Related drilling products

Compare other Sutton drills: D109 heavy-duty cobalt, D202 left-hand cobalt, D101 Silver Bullet and D179 Viper Plus. Sets are in the Metric Jobber Drill Sets and the Imperial Jobber Drill Sets. Need help choosing? Our guide to choosing the right drill bit and drill bit selection guide cover drill types and materials, and the speeds and feeds chart and cutting tool troubleshooting guide cover speeds and common problems. The cobalt drill bit guide explains cobalt grades.