What Make For Good Quality Long Lasting Spade Bits?

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I like the Bosch blue "spade bits" they have a screw thread that pulls the bit through. Quite aggressive!


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DiscoStu":39v1qr0w said:
I like the Bosch blue "spade bits" they have a screw thread that pulls the bit through. Quite aggressive!


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OK I'll have a look.
 
beech1948":1j7avobw said:
I won't use spade bits because they produce the most awful untidy oversize holes imaginable. Horrid things
Sounds like you've never used a really sharp one, and possibly they had off-centre central spurs. Been there!

Spade bits are often not sharp enough from the factory but give 'em a good sharpen and it completely transforms how they perform, as long as the central spur is actually central.

Some say you should file to create spurs/horns on the outside edges to improve the quality of the hole wall but even without this trick if the bit is really sharp it should cut really quite well.
 
ED65,

I sharpen all my bits augers/forstners/HSS and many others. Saves a fortune.

When I had some I even sharpened my spade bits. Religiously. They were and continue to be utter rubbish.

Your comments are somewhat disparaging bearing in mind some 50+ years experience with wood and hole drilling.
 
Since Auger bits don't cost much more than spade bits and are a lot better, I use them. Spade bits are a bit rudimentary and unsuitable for fine work.
 
g7g7g7g7":4yqtfugp said:
https://www.workshopheaven.com/star-m-japanese-f-type-bit-singles.html

I got one of these with a pair of holdfasts and have invested in a few more since because they are great, highly recommended instead of flat bits.

They look very sexy and I NEED some right away. Before I do, however - how does one sharpen them?

Thanks in advance

Greg
 
Surely, spade bits have their place - for jobs such as boring through joists for pipes and cables, where a little roughness doesn't matter at all.
 
AndyT":12xlktmt said:
Surely, spade bits have their place - for jobs such as boring through joists for pipes and cables, where a little roughness doesn't matter at all.
If you don't have an appropriate size augur bit, and you don't want to spend the money on one, then a spade bit will get the job done. But I don't think there's any job where the answer to the question "What's the best tool for this job?" is "a spade bit".
 
pcb1962":330tj5eo said:
But I don't think there's any job where the answer to the question "What's the best tool for this job?" is "a spade bit".

Yes there is. Whats the cheapest way to make a rough as rats holes?


In all honesty never tried the classy spade bits but I would never recommend basic ones.
 
I should point out that when I've used spade bits, I've used them in a corded electric drill, spinning at high speed. They are probably a lot less good in a relatively slow battery powered drill.
 
I agree I don' like the ones with a threaded tip far to fast for drilling out latch's on doors, I always use spade bits on site but might just try a few from the above post's to compare with,
Paul
 
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