Skip navigation

Horia Jeweling Tool

by J.Peter

Tags: , , , , , ,

Tuesday Tools

The Horia Jeweling Tool

What is a jeweling tool? Jewels in wristwatches serve as bearing surfaces for pivots. Essentially a gear (wheel) has an axle and the axle rides between two jewels. The axle needs to have some freedom of movement (or endshake) to allow it to rotate freely but not so much as to keep it from lining up with the next wheel when the watch changes position. In most watches the average endshakes range from .01mm to .05mm. In order to adjust the endshake for a particular wheel we move the jewel up and down in the plate. The jewels in modern watches are held into place by friction and can be moved up or down. (This wasn’t the case in older watches.) A jeweling tool is used for installing frictioned jewels and for adjusting the endshake.


There are several different jeweling tools. The most common is probably the Seitz jeweling tool. It is a levered press and takes some getting used to. The Horia tool is (in my opinion) far superior.

The pushers and stumps are fit to the tool to match the size of the jewel. To move the jewel you turn the micrometric feed on the top. Each mark on the dial represents approximately 0.02mm of vertical movement. It’s a beautiful tool. It can also be used for removing and installing pallet staffs and adjusting tension on traditional style cannon pinions. I’m sure there are more uses, if you know of any add a comment.

One advantage to the Seitz tool is the ability to raise the lever out of the way and use the reamers for opening (or forming) jewel holes. A good staking set will supply you with this functionality as well.

The Horia company is a very small company which specializes in watchmaker’s tools. They make some of the finest 8mm watchmaker’s lathes, jeweling tools, Jacot Tools, and Automatic Burnshers available today. They’re not cheap but they are quality precision tools.

Note: There are two versions of this tool, one where the stumps and pushers are different diameters, and one where they are the same. I have the one where they are different. I recommend you get the one where they are the same, it will then be comaptible with all of the Seitz stumps and pushers as well as the specialized stumps made for Incabloc shock settings. I had to modify a set of Incabloc pushers so I could use them in my tool.

Be Sociable, Share!


  1. Chris
    Posted May 7, 2009 at 6:18 am | Permalink

    This is an interesting tool for jeweling. Is there no need for a lever to force or press the jewel into place?
    If so, I guess the micrometer head threads are strong enough to withstand the force?

  2. J.Peter
    Posted May 7, 2009 at 11:00 am | Permalink

    Chris, the force required to seat a jewel is not really great. The action of the threads is more than enough. It really is the best tool as you can easily adjust the position of a jewel by .01 or .02 mm confidently.

  3. Chris
    Posted May 7, 2009 at 6:59 pm | Permalink

    Thanks for the info! Couple of more questions. I have an older Horia Staking & Jeweling set. You would think that the pushers and anvils would be the same. Are your base & spindle measurements exactly 3mm & 4mm? My anvils are 4.9mm and pushers are 3.9mm. I was really hoping to buy the tool you have and use my existing pushers and anvils. I guess not.
    Thanks again,

  4. Gui
    Posted December 21, 2009 at 8:45 am | Permalink

    I have the same one (#3) for sale if anybody is interested.
    I can email pix.

  5. Posted April 17, 2012 at 11:03 am | Permalink

    Hello Jordan!

    I feel that your statement where You say how Horia jewelling tool is far superior to Seitz must be challenged. I really would like to hear what is it that Horia tool can do and standard Seitz cannot, including the the endshake adjustment governed by micrometer setting.

    BTW Horia tool is a knockoff of the early 1950’s Seitz #30664 specialised Jewelling Tool for endshake adjustment.

    Also what is it about the Seitz tool that “takes some getting used to”?

    I have used my Seitz tool during several decades and its use is simple and straight forward, a piece of cake.


    The newsletter:

    The 1954 Seitz Price List:

  6. J.Peter
    Posted April 17, 2012 at 12:01 pm | Permalink

    Dushan, thank you for sharing your opinion. At the time of my writing this post (4 years ago and just 2 years into my watchmaking career), my only exposure to Seitz tools was their reduced set (which does not have a micrometric feed). Installing jewels by squeezing a lever requires more skills for precise adjustment, than does turning a precisely controlled micrometric knob. I am now aware that there are Seitz tools with micrometric feed but of the 4 sets I have used, not one of them had it so I think they must be more rare than the ones that do. I do agree that the Horiz tool looks just like the 30644 tool. Is that tool still available? Of the tools I have used (Favorite, Seitz, Horia) the Horia has been the most precise and easiest to use, albeit the least versatile. Also, the Horia tool fits nicely in my bench where the Seitz tool is much larger and does not fit well in my bench and the handle needs to be removed for convenient micrometric adjustments.

    I use my Favorite tool for jobs where it works best (reaming holes for jewels, and more) and my Horia tool for adjusting endshakes.

4 Trackbacks/Pingbacks

  1. […] out the lathes. Our first project was to make a set of pushers and anvils (out of brass) for our Horia Tool. Because they need to fit into the tool nicely and be perfectly centered tolerances were +/- .03 […]

  2. […] began to adjust endshakes and we would have to restore them to their correct positions using our jeweling tool. At this point we didn’t have to worry about whether or not the watch would tell time, it […]

  3. […] talked about them in the past. I’ve talked about special tools for adjusting them, but what is the big deal about end […]

  4. […] Set of brass pin vises Set of steel pin vises Hand Levers Pin Vises (Slick) / Barrel Arbor Holders Horia Jeweling Tool Staking Set Brass Hammer Incabloc pushers Balance tack Barrel Closing Tool Plexi Stick Pegwood […]

Post a Comment

Your email is never published nor shared. Required fields are marked *