Best Drill Bit For Oak Sleepers

By Sam Wood •  Updated: 10/15/21 

If you are planning on building with oak sleepers then you will no doubt want to know if your gear is up to it.

One important factor will be choosing the right drill bit for oak sleepers. As you will no doubt already be aware, oak is very tough and can make a fool out of cheaper drill bits.

These are the drill bits I would recommend for countersinking a screw into an oak sleeper.

High Quality Auger Bits!
Bahco SB-9526/ S6 Auger Bit Set
£34.99
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12/03/2021 12:04 am GMT

I recommend these Bacho bits as they are really high quality. They fly through all different types of wood, including oak.

They are also made of high-grade steel which allows them to be easily sharpened. So although they may be expensive at first they will pay you back by lasting for decades.

The set comes with 6 bits going from 10mm up to 25mm.

No Need To Pilot

With good screws, there is no need to pilot all of the way through oak sleepers. That is why I recommend the auger bit above to just countersink the head of the screw.

So, what is a good screw? Well for sleepers Timberfix offers the best screws. You can get these into an oak sleeper with a decent drill or impact driver without needing to pilot.

Top Quality Screws
100, 150mm TIMBERFIX Plus HEX Head Sleeper Screws
£31.99
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12/03/2021 12:04 am GMT

The downside to these screws though is the cost. I’m not going to lie, they ain’t cheap. If the cost is just too much to handle then I don’t blame you. I have had a lot of success with these spectre brand screws.

These are a lot cheaper but are still really high-quality screws that going into sleepers without a problem.

Value & Quality
Spectre Advanced Timber Fixing Screws Box 50 6.3 x 150mm
£11.98
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If you want to pilot

If you do want to pilot then you will need a long, strong drill bit. I recommend this Bosch bit below. Bosch makes good quality bits, you cant go far wrong with them.

Auger Bit
Bosch Auger Drill Bit, 6mm x 100mm x 160mm
£6.65
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12/03/2021 12:04 am GMT

Again I recommend an auger bit here. The auger will help bring the material out of the sleeper as you drill. This is essential for drilling long holes into a hardwood like oak.

Sam Wood

Wood by name, wood by nature. I am a fully qualified, time-served, award-winning joiner with an NVQ Level 3 in Carpentry and Joinery as well as an HNC in Construction. Beyond my joinery qualifications, I have also earned a degree in building surveying. I believe these qualifications make me perfectly positioned to provide expert advice on many different areas of DIY as well as share all of the tips I have picked up in over a decade working on building sites!