Sutton Viper D105 9.5mm HSS Jobber Drill Bit

The Sutton Viper D105 is a 9.5mm high speed steel jobber drill bit, made to DIN338 dimensions and sold carded as a single bit. The 9.5mm size is the imperial standard three eighths of an inch dressed up in metric, and it is a common clearance and pilot size in mixed metric and imperial work. The Viper point is a 118 degree split point that self centers on the mark, starts clean, and drills up to 2 times faster than a conventional HSS bit.

Key Features

• Viper point design delivers up to 2 times faster drilling than conventional HSS bits
• 118 degree self centering split point
• DIN338 HSS jobber geometry in a 9.5mm diameter
• Less pressure required when drilling
• Suits machine and hand held drilling
• Carded single bit

Specifications

• Diameter: 9.5mm
• Type: HSS jobber drill bit, DIN338
• Model: D105
• Point: 118 degree split point, self centering
• Materials: steel, aluminium, brass, wood and plastics

Applications

• Clearance holes for 3/8 inch bolts and metric equivalents
• Pilot holes for 10mm fasteners
• Drilling steel, aluminium and brass
• General fabrication and maintenance

What You Need To Complete The Job

Run a 9.5mm bit in a drill with torque and a steady feed, with cutting oil on steel. For concrete and brick, use an SDS masonry drill instead, and keep leather rigger gloves on when handling metal. The wider cutting range is in General Hand Tools.

Frequently Asked Questions

Is 9.5mm the same as three eighths of an inch?

Yes. A 9.5mm drill bit matches a 3/8 inch bit, so it suits imperial fasteners as well as metric work. It is a handy bridge size on sites that mix both systems, which is why the 9.5mm step sits between the 9mm and 10mm standards.

Is a 9.5mm bit the same as three eighths of an inch?

Yes. A 9.5mm drill bit matches a 3/8 inch bit, so it suits imperial fasteners as well as the metric work it is labelled for. It is a useful bridge size on sites that mix both systems.

What speed should I use for 9.5mm in steel?

Use a moderate speed and a firm, steady feed with lubricant. At this diameter the bit cuts best at a slower spindle speed than a small bit, with enough pressure to keep the edge biting.

Will this bit drill aluminium plate cleanly?

Yes. Aluminium drills quickly with an HSS bit at a moderate speed and a light oil. Keep the feed steady and clear the flutes to avoid the edge loading up on soft metal.

Can I use it for woodworking?

Yes, it clears holes in timber for bolts and coach screws. For clean wood holes, drill from both sides if the timber is thick, or back the bit out to clear sawdust.