Drill size for tap

[brightspark]

get all my replacement ones from tracy tools good quality and not expensive. fast delivery . or sort of now with postal stikes

 

[Smouser]

https://www.ukdrills.com/ This place is good. I use them often

I bought some 11.8mm drill from them and they were so poor. They just did not want to cut all (the hole was pilot bored and 'stepped up' with increasing drill sizes).

Decided to just spend the money and get Dormer bits, they are always sharp and work very well for me.

 

[bourbon]

I bought some 11.8mm drill from them and they were so poor. They just did not want to cut all (the hole was pilot bored and 'stepped up' with increasing drill sizes).

Decided to just spend the money and get Dormer bits, they are always sharp and work very well for me.

I agree, the cheaper ones are 'not the best' I always go mid range pricewise

 

[Rrobson]

You could always grind the drill slightly off centre if your able, that will drill a slightly oversized hole

 

[Other Daniel]

I bought some 11.8mm drill from them and they were so poor. They just did not want to cut all (the hole was pilot bored and 'stepped up' with increasing drill sizes).

Decided to just spend the money and get Dormer bits, they are always sharp and work very well for me.

"Stepping Up" doesn't always work as you would hope it would.
Drills seem to like to have a good bite at the job, to perform as
expected.

 

[brightspark]

drilling a small pilot hole overcomes the chissel flat on the larger drill bit from just rubbing

 

[MattF]

drilling a small pilot hole overcomes the chissel flat on the larger drill bit from just rubbing

That's what I normally do, nowadays. Pilot just to make a hole wide enough for the tip area of the larger drill.

 

[waddycall]

What’s the application for the tapped hole? If it’s nothing to significant I’d just give it a go with what you’ve got and take it steady. Could always wiggle the drill around a bit

 

[RichardM]

It'll always drill 8.2 or 8.3 until the day you need an oversize hole, then it will come out a reamer type fit at 8.0mm It's a general rule of machining.

Fixed that for you

 

[fixedfixer]

Only for now.
We will wait untill you catch up.

I need to master my little mini lathe, an older version of the Axminster C2 300. Five years ago I saw one advertised locally and thought it would make a fun retirement hobby. I don’t need to tell you folks how handy these little lathes can be for odd jobs. I’m embarrassed to say it’s not being used to anywhere near its full potential. But that’s all to come.