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MT end mills slightly corroded

(How to restore)

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Dr. MC Black05/05/2021 01:06:16
203 forum posts
1 photos

I have inherited some end mills with a MT2 shank which is mucky and mildly corroded.

What is the best way to clean the Morse Taper.

There is plenty of advise about cleaning female Morse Tapers but I would appreciate advice on cleaning the male Taper

Very many thanks

not done it yet05/05/2021 06:22:27
5870 forum posts
20 photos

Mildly abrasive material mounted on bench grinder or similar?

Wire wool?

Brass wire wheels?

Paint stripping flapwheels?

Elbow grease with sheet materials?

Edited By not done it yet on 05/05/2021 06:22:55

mgnbuk05/05/2021 07:31:31
977 forum posts
66 photos

Fine (maroon coloured) Scotchbrite pads after degreasing.

Nigel B.

HOWARDT05/05/2021 08:03:04
724 forum posts
25 photos

Oil and Scotchbrite or wire wool, don’t use anything that will remove metal as you risk changing taper shape. Old machine shops often have rusty looking tapers around, at least they did in my days.

Grindstone Cowboy05/05/2021 08:35:48
586 forum posts
57 photos

I find the stainless steel pan scourers to be very effective, not as messy as wire wool For example, these.

Links to https://www.diy.com/departments/stainless-steel-scourer-pack-of-4/3663602564775_BQ.prd

Rob

Nicholas Farr05/05/2021 08:37:03
avatar
2733 forum posts
1262 photos

Well I use a fairly worn smooth file by holding the drill in one hand and lightly brushing the taper lengthwise in a draw file fashion, but I do go all the way round regardless, which takes the worst off and any dings and then finish off with Scotchbrite, although I don't make them all shiny polished. Never had any problems with any not running true with this method and they always hold in just like a brand new one.

Regards Nick.

Dr. MC Black05/05/2021 11:31:56
203 forum posts
1 photos

Very many thanks to everybody who responded.

Since I'm Clinically Extremely Vulnerable, I'm NOT going out a present so would like to use "stuff" that I have here if possible.

Is Chestnut Product's "Nyweb" the same as Scotchbrite?

How about the similar looking pads aimed at the Washing-up market.

I realised after posting my original message that there's an egregious typographical error! I know that it is possible to edit messages (because I often see a note that a message was edited) but how exactly does one do that please?

I really do NOT want any readers to think that I can't spell!

With best wishes and thanks again.

MC

Mark Rand05/05/2021 11:43:24
989 forum posts
10 photos

Posted by MC Black on 05/05/2021 11:31:56:

I really do NOT want any readers to think that I can't spell!

Just assumed that you were American cheeky.

 

There is an edit button shown to the poster in the green bar above the post, but the opportunity goes away after a while.

 

(Edited because I forgot where the button was)

Edited By Mark Rand on 05/05/2021 11:44:07

Dr. MC Black05/05/2021 11:55:33
203 forum posts
1 photos
Posted by Mark Rand on 05/05/2021 11:43:24:

Posted by MC Black on 05/05/2021 11:31:56:

I really do NOT want any readers to think that I can't spell!

Just assumed that you were American cheeky.

sad sad

There is an edit button shown to the poster in the green bar above the post, but the opportunity goes away after a while.

(Edited because I forgot where the button was)

Edited By Mark Rand on 05/05/2021 11:44:07

I really would NOT want anybody to think I was American. I just have trouble typing!

Why does the opportunity to edit "go away"?

Perhaps that's an opportunity for improving the interface!

With best wishes and thanks again.

MC Black (Dr.)

 

Edited By MC Black on 05/05/2021 11:56:48

mgnbuk05/05/2021 12:11:23
977 forum posts
66 photos

Is Chestnut Product's "Nyweb" the same as Scotchbrite?

This appears to be a similar product to Scotchbrite - the red (600 grit) or orange (1000 grit) pads should work fine.

Using WD40 or similar as a lubricant works well - my "go to" solution for cleaning up tarnished / rusty ground surfaces.

Nigel B.

Adrian R205/05/2021 12:21:30
93 forum posts
8 photos

Thinking about function and fit: Rust or loose material needs to be gently removed without changing the shape of the taper, light pitting isn't going to make any practical difference but if there are any dings or bumps then ensure that the edges of these are not proud of the surface otherwise they will prevent a good grip and might score the inside of the female part if it spins in use.

John Reese08/05/2021 05:59:47
906 forum posts

I would prefer soaking in Evaporust over application of abrasives.

not done it yet08/05/2021 06:50:34
5870 forum posts
20 photos

John,

There are abrasives and abrasives, Use depends on the duty. Look up the Mhos scale. Talc is not particularly abrasive, but diamond will scratch everything else.

The Mhos scale refers mainly to minerals, but put simply one requires a harder material to abrade any object. The mild corrosion on tooling will have a different hardness and so may well be abraded by a mineral which will not abrade the steel. It’s why scotchbrite is used to polish up a finish rather than grinding away the base metal.

On top of that there are different grades of any particular abrasive. Coarse which leave large scratch marks and fine which removes tiny amounts of material. Sensible selection of the correct abrasive will work perfectly adequately.

jimmy b08/05/2021 07:43:17
avatar
718 forum posts
42 photos

I've had some fantastic results with an ultrasonic cleaner on some old taps and dies.

Evaporust is also very effective.

Jim

jimmy b08/05/2021 07:43:18
avatar
718 forum posts
42 photos

I've had some fantastic results with an ultrasonic cleaner on some old taps and dies.

Evaporust is also very effective.

Jim

Dr. MC Black08/05/2021 11:31:33
203 forum posts
1 photos
Posted by jimmy b on 08/05/2021 07:43:18:

I've had some fantastic results with an ultrasonic cleaner on some old taps and dies.

Evaporust is also very effective.

Jim

Very many thanks to everybody for taking the time to respond.

I had NOT heard of Evaporust before today.

I have discovered that the nearest supplier is over 75 miles away. Courier companies have extreme difficulties in making satisfactory deliveries to my home - so mail order is something that I avoid.

Is Evaporust the same as Shield Technology RESTORE?

I would be cautious about putting these End Mills in an Ultrasonic Bath in case the solution damaged the cutting edges.

With best wishes and thanks again.

MC

old mart08/05/2021 14:25:57
2914 forum posts
184 photos

I prefer wire wool and oil, don't expect to make the surface pretty, just mainly rust free.

mark costello 108/05/2021 18:30:24
avatar
638 forum posts
12 photos

What's wrong about being American?

bernard towers08/05/2021 18:40:29
164 forum posts
70 photos

you don't make it clear if they are tanged or threaded, the ones I have are tanged and are under the bench and thats where they will stay

Dr. MC Black08/05/2021 18:45:23
203 forum posts
1 photos
Posted by mark costello 1 on 08/05/2021 18:30:24:

What's wrong about being American?

Americans speak a different language.

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