Jump to content
LumeShot

Difference between AM and MM Tweezers?

Recommended Posts

Hi guys. Recently I've invested in Dumont tweezers, the #2, #3 and #5 from the "Dumostar series" and the #2 and #1 from the "Hi-Tech economy series", but now I'm looking into getting some quality brass tweezers as well. 

 

I was looking through Horotec's line of brass tweezers but noticed that there were two types, the "AM" and "MM". I couldn't find information online about the difference between the two and which  job each type was purposed for. Could anyone explain the differences between "AM" and "MM" brass tweezers? Thank you! 

 

 

Share this post


Link to post
Share on other sites

Yes, they are different shapes. MM is more broad, my AM is like #3.

Quote

MM are Non-magnetic. AM are Anti magnetic.

Nice, but wrong. I did not yet hear of magnetic brass.
And what is that:

MM.jpg.3795eb529d0d55ac982a4adf2928f04b.jpg

Frank

Share this post


Link to post
Share on other sites

If you look at the Guide to Watchmakers Tweezers on Esslinger they show as a style and show these marks on many different styles of tweezers.

https://blog.esslinger.com/guide-to-watchmakers-tweezers/

Now I am confused, so I went to a source and ask the question on what the MM and AM markings mean from Dumont Tools. I will post the reply when it comes in.

Share this post


Link to post
Share on other sites
On 5/10/2019 at 4:48 AM, oldhippy said:

MM are Non-magnetic. AM are Anti magnetic.

I could not find information regarding non-magnetic vs anti-magnetic. However, since the tweezers are made of brass, I had assumed they would not be magnetic at all. Which left me wondering with the question in the original post. 

Share this post


Link to post
Share on other sites
20 hours ago, Charlie925 said:

If you look at the Guide to Watchmakers Tweezers on Esslinger they show as a style and show these marks on many different styles of tweezers.

https://blog.esslinger.com/guide-to-watchmakers-tweezers/

Now I am confused, so I went to a source and ask the question on what the MM and AM markings mean from Dumont Tools. I will post the reply when it comes in.

Same! I was reading all over horotec for some type of distinction between MM and AM, but there was no actual explanation. Hope to hear from what Dumont has to say about it. 

Share this post


Link to post
Share on other sites

Ok, this is what I got from Dumont:

************************

Hi,

Many thanks for your email. The AM or MM on the twezeers are the type of tweezers as you can see on our PDF brochures attached.

This is not meaning no magnetic or magnetic !!! 

Tweezers AM that we produce are BRASS tweezers with a gold cover of 3 microns .

 Feel free to contact me if you have other questions.

Thanks to work with our tweezers.

Our family factory has 5 generations ( same family--- my husband was a Dumont son. ).

 Kind regards,

 Nicole Sgobero
Vice President 

*************************************

Now granted this is just one company. I am sure each one has different meanings for the "AM" and "MM" markings.

Edited by Charlie925
added notes.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...

  • Recently Browsing

    No registered users viewing this page.

  • Topics

  • Posts

    • Have these two on the bench this week, thought it was a funny contrast. The left is the Lemania 5100, perhaps the epitome of industrialization and use of injection molded plastic in a mechanical chronograph; almost the whole chrono mechanism is on the dial side, under an acrylic plate that supports the date rings. Vertical clutch with nylon gearing in it, plastic all over. Extremely reliable however! This one had suffered some sort of chemical exposure in the past, with pock marks in the rhodium plating and harsh staining on the barrel great wheel. Ended up running fine with 11 second delta in 6 positions.   The right hand one is a Longines 30CH, one of the most beautiful chronos ever made in my opinion. This one was in fine shape other than a non-original, ugly, and nonfunctional minute counter jumper. The one present in the photo is the replacement I made. This beauty had a whopping 16 second delta, and still hit near 270 degrees amp at 24 hours. Amazing.    
    • found this watch in a house clearance -  on the watch case is says the Franklin mint c 1989,  I think some of the watch could be gold but not sure ,  As you can see it looks in very bad shape and I am not sure if it is repairable  .  from what I can see there is Rust on some parts from possible water getting in - the front glass is missing from the watch  -     At the moment I have been learning on a cheap  ETA 6498  watch  so I have limited experience in watch repair,  so I might keep this watch  until I have  gain more knowledge of watch repairs .  As for the back case I think its a pop off  type but it feels stuck on and so far I cant get the case off,  so any advise on this watch and what I should do with it  will be very appreciated , if its just scrap I might just use it to learn on now  or for parts .
    • The cleaner,  ammonia is a active ingredient so does smell , its about £18.00 per litre as apposed to £30.00  a litre for Horolene and I can detect no difference in cleaning performance, it is used at a ratio of one part cleaner to 7 parts water, just as Horolene is, I always buy it direct from their Ebay shop and get a 10ml J.D Windles clock oil thrown in.
    • Hi all i am new to the forum and watch and clock repair, can anyone help me how to open a Hermle clock mainspring barrel so i can inspect and clean the spring the ones i have seen just pop off i can't find one like this, see photo thanks Willow
    • Hello Rogart, and thank you for the generous offer. After a quick look on ranfft it does appear that 12.68N does have a quite a bit larger pivot, as the dimensions listed are "1.6 x 1.00 x 0.22mm", while the 12.68Z has "1.32 x 0.75 x 0.22mm". So unless I am missing something, I'm assuming they wouldn't fit very well. I did measure the lenght of my hands, 10.9mm on the hour, and 14.75mm on the minute, roughly as the metal looks quite brittle, and I didn't want to mash it in my caliper. I am curious if the lenghts are similar to the 12.68N.
×
×
  • Create New...