HSS Drill Bits
HSS drill bits are designed for cutting through tough materials like steel, aluminium and hard plastics. From standard high-speed steel to pro-grade carbide bits, they’re built for durability and precision.
Who Uses HSS Drill Bits?
Used by trades who need accuracy and heat resistance when drilling into metal:
- Metal Fabricators – Cut clean holes through sheet and structural steel.
- Electricians – Drill through trunking, boxes and panels with control.
- Maintenance Crews – Use on mixed surfaces like fixings through steel or alloy.
- Installers – Clean out rivet holes or prep cable grommets on metal work.
HSS Drill Bits Are Great for Jobs Such As:
- Drilling steel conduit and trunking
- Fixing brackets or plates into metal frames
- Fabricating panels or cable trays
- Installing switches or sockets through alloy cladding
- Cutting through stainless with cobalt tips
How to Choose the Right HSS Drill Bit
Choosing the right HSS drill bit depends on material, usage frequency, and finish requirements:
1. Standard vs Cobalt
Standard HSS: Best for mild steel and light work.
Cobalt: Handles stainless, alloy, and repeated heat cycles without dulling.
2. Coatings
Titanium or black oxide coatings reduce friction and wear. Choose these for cleaner finishes and longer tool life.
3. Point Angles & Split Tips
135° split point bits are ideal for hard metals – they don’t walk and require less pressure to start the hole.
Accessories to Pair with HSS Drill Bits
Support your bits and get more out of your drilling setup:
1. Lubricants & Cutting Fluids
Reduce heat build-up and prolong bit life when drilling tougher materials.
2. Centre Punches
Mark hole centres and avoid slipping – especially on smooth sheet metal.
3. Drill Stands & Guides
Ensure square holes and consistent depth when working on bench or mobile rigs.
Frequently Asked Questions
What does HSS mean?
HSS stands for High Speed Steel – a tough, durable alloy that withstands heat and speed, ideal for drilling metal and plastic.
What’s the difference between HSS and cobalt bits?
Cobalt bits are a type of HSS made with 5–8% cobalt alloy, which makes them better for harder metals and repeated use under heat.
Can I use HSS bits in a cordless drill?
Yes – they work in standard keyless or keyed chucks. For harder metals, use lower speeds and steady pressure to avoid overheating.
How do I stop HSS bits from wearing out?
Use cutting fluid, avoid dry drilling, and let the bit cool between uses. Sharpening helps, but only if the bit is properly ground.
Are coated bits better?
Yes – titanium or black oxide coatings reduce friction and help the bit last longer. Use them for frequent or critical work.
