What is a hub,and how is it used to make a die?

Coin Dies To Mint US Coins.
 A  hub is a tool which has the design of one side of the coin (medal,token,etc.)  on its face. To make a die,the hub is pressed into the softened steel die blank at least once, usually two or more times.Thus the die has a matching relief or incuse design, a mirror image of the hub design,so that when the die strikes a coin it will produce a matching relief or incuse design on the coin.
If you lay a piece of aluminum foil over a coin and press it down until it picks up the design,you have something that will demonstrate the difference between a die and a hub.The surface of the foil in contact with the coin has an incuse design- like the die.The upper surface of the foil has a relief design,like the hub. If you could harden the foil,you would have a die with which  to strike more coins.If you turn the foil over,you would have a hub to make more dies.

"The design on a hub is in relief." How does that work on a coin with incuse design elements?

A Defaced US 5¢ Coin Die.
"The design on a hub is in relief." is a general statement,true of most coins,the vast majority of which have relief design. The hub has the design exactly as it appear on the coin.If the design is in relief, it will be the same on the hub.Where is incuse,it will also be incuse on the dub.


  1. Hi Dickson.

    A little bit about blogging in here. Sorry, off topic.

    You need to get your title right:
    http://dniewcollectors.blogspot.com/2011/08/niewmismatic-questions-and-answerswhat.html<---- your post URL. (this is called permalink, its permanent).

    You should select a title "WHAT IS A HUB". After you publish your post, change it again to whatever that you like. You cannot change your old posts though.

    Sorry. A little bit blog tutorial in here. just delete them later if you don't want to show this.

    Keep on blogging bro. email me if you still don't understand.

  2. Dear lunaticg,
    Thank you for your good infos.
    I will keep blogging Bro.
    Selamat menyambut Hari Raya!
    Balik Sabah ?
    I just got contacted with Mr.Bobby Voon,he is here in Subang until early September.We shall meet soon.