Drill bit Top Tools HSS cylindrical 8 mm, model 60H480_1

Top Tools HSS cylindrical drill bit 8 mm (model 60H480_1) is a single straight-shank twist drill made of high-speed steel intended for general drilling tasks in metalworking and workshop applications. The HSS material provides improved wear resistance and higher temperature tolerance compared with standard carbon-steel bits. The cylindrical shank fits standard three-jaw chucks and hand drills, allowing use in portable and bench-mounted drilling machines.

Advantages

This 8 mm HSS drill bit offers durable cutting performance on a range of materials commonly found in maintenance, repair and construction. High-speed steel resists softening at elevated temperatures, reducing premature wear during continuous drilling. The straight cylindrical shank ensures compatibility with ordinary drill chucks and simplifies bit changes. The drill geometry is suitable for producing clean holes in steel, non-ferrous metals and many plastics when used with appropriate speeds and lubrication.

Suitable for

• Drilling holes in mild and medium-strength steels
• Working with aluminum, brass and other non-ferrous metals
• Creating holes in plastics and composite materials
• General workshop, repair and construction drilling tasks
• Use in portable hand drills and bench drills with standard chucks

When it may not be suitable

This HSS cylindrical drill bit is not optimized for drilling hardened steels, titanium alloys, or abrasive materials; for those applications, carbide or coated specialty drills are more appropriate. It may also wear faster under continuous high-speed production use compared with coated or carbide-tipped tools designed for high-volume industrial machining.

Key specifications

• Material: high-speed steel (HSS)
• Shank type: cylindrical / straight
• Cutting diameter: 8 mm
• Intended materials: steel, non-ferrous metals, plastics
• Compatibility: standard three-jaw drill chucks and hand drills

How to use

Secure the drill bit firmly in the chuck, ensuring correct centring and tight clamping. Select a drill speed appropriate for the workpiece material: lower speeds for steel and higher speeds for softer non-ferrous metals and plastics. Use cutting fluid or lubrication when drilling steel to reduce heat and extend tool life. Apply steady, moderate feed pressure and clear chips frequently to avoid clogging and overheating. For precise holes, start with a centre punch or pilot mark before drilling.

What to consider before purchase

• Verify that an 8 mm diameter meets the hole size requirements for your project
• Confirm your drill chuck accepts cylindrical straight shanks
• Consider material compatibility—HSS is suitable for steels and non-ferrous metals but not ideal for hardened or highly abrasive materials
• Decide if you need coated or carbide drills for higher wear resistance in production environments

Usage recommendations

For best results, use appropriate cutting speeds and cooling when drilling metals, keep the drill bit sharp, and replace it once signs of wear such as rounded lips, excessive heat discoloration, or poor hole quality appear. When drilling plastics, reduce speed and avoid excessive feed to prevent melting.