Rusty drill bit

[ConfusedCheese]

Hiya,

Went to use my drill today and noticed that the one of the titanium coated hss bits is pretty rusty. I've lent them out to a few people in the last few months so I assume someone didn't clean the bit after, but does anyone know what might of caused it to rust like this? Especially the black splodges. Sap from wood maybe (I know its not a wood bit)? water?

They're only cheap bits so is no biggy, was just curious

 

[Deluks]

Don't lend tools out. You rarely get them back in the same condition.
Yes, water, or moisture from wood. It'll prob come off if you drill it into some timber or thin metal.
These can be used on timber btw.

 

[foxhole]

Probably been used on metal and over heated, black bits are melted metal and rust will be on fragments annealed to bit.

 

[HERTS P&D]

As above:

DON'T LEND TOOLS- THEY CAN BUY THEIR OWN OR PAY YOU TO DO THE JOB!

Andy

 

[Harbourwoodwork]

green oak is a bit of a killer, but probably not as bad as a friend that borrows tools

 

[^woody^]

I'm not sure I would have a problem with lending someone a 50p drill bit, but I certainly would not rely on it to be sharp or reusable when I got it back

 

[ConfusedCheese]

Well its from a set of about 15 bits that cost less than a tenner, so its not a huge loss. I have a much better set that stays at home.

I've just noticed a bit of the same corrosion on the end of the chuck tho

 

[peterperfection]

As above:

DON'T LEND TOOLS- THEY CAN BUY THEIR OWN OR PAY YOU TO DO THE JOB!

Andy

Heed this advice,
I now have a 18''wackerplate totally knackered by 2 people who i loaned it to.
My cement mixer-- bits missing and covered in hard-on concrete in the drum.
A makita sander- burned out.
110 core drill knackered.
All because I am too soft and loaned these expensive pieces of equipment to DIY-ers who 'borrowed them cheap (free)- and treated them cheap.
Good pals of mine - who I only hear from when they want to borrow something off me.
Never again. (I hope).

 

[Burnerman]

Loaned a chainsaw out whilst his was being repaired.....silly get ran it with the chain brake on, and being a Ryobi came back as a blob of molten plastic.
Thats a hundred quid, cheers.
John

 

[Harbourwoodwork]

I loaned a neighbor a 4.5" grinder he brought it back saying its broken mate no offer of recon-pence I found out later he'd been cleaning out the caulking joints on his boat ,you can just imagine the blade getting stuck in the wooden joint then the tool going POP,a couple of days later.he comes round to tell me about the new grinder he'd bought himself ,he comes round again asking if the decorators filler he'd put in the joints on his boat would be OK, well I couldn't help having a little pleasure telling him it was absolute rubbish and would all have to come out or the boat would sink but still a grinder down