Sutton Viper D105 4.5mm HSS Jobber Drill Bit

The Sutton Viper D105 is a 4.5mm high speed steel jobber drill bit, made to DIN338 and sold carded as a single bit. The Viper point is a 118 degree split point that self centers as it starts, which stops the bit walking on the mark and cuts down the pressure needed to feed it. It is built for machine and hand held drilling in a wide range of ferrous and non ferrous materials, from steel and aluminium to brass, wood and plastics.

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 4.5mm diameter
• Less pressure required when drilling
• Suits machine and hand held drilling
• Carded single bit

Specifications

• Diameter: 4.5mm
• Type: HSS jobber drill bit, DIN338
• Model: D105
• Point: 118 degree split point, self centering
• Materials: steel, aluminium, brass, wood and plastics

Applications

• Pilot holes for 5mm and 5.5mm fasteners
• Small clearance holes in metal
• Drilling aluminium and brass fittings
• Sheet metal and light fabrication

What You Need To Complete The Job

This size suits a standard drill at a fast speed with a light feed. For masonry work, move to an SDS masonry drill, and when you need to trim metal to length keep an hacksaw in the kit. The full fastening and cutting range is under General Hand Tools.

Frequently Asked Questions

What is a 4.5mm drill bit used for?

A 4.5mm HSS bit sits between the common 4mm and 5mm sizes and is used for pilot holes and clearance holes where a 4mm is just too small. It is a handy size for 5mm rivets and small bolts in metal work.

How do I stop the bit wandering?

The self centering split point does most of the work: it bites into the surface and holds the bit on the mark. Keep the drill at right angles to the work and use a steady feed, and the hole will start where you aimed it.

Can this bit drill through hardened steel?

No, HSS jobber bits are for normal and stainless steels, not hardened or tool steel. For hardened material you need a carbide or specialist bit. Use this Viper bit for the everyday metals it is made for.

Is it worth resharpening a 4.5mm bit?

Yes, at this size a quick regrind can bring a blunt bit back to service. Keep the split point profile close to the original and it will keep drilling cleanly. Once it is badly chipped, replace it.