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Lockshank installation is relatively easy for an experienced goldsmith. If you have a question, our professional support staff and expert installers will gladly answer in a timely manner.



1. Determine the correct size for the customer's finger at the place the ring will be worn. Size customer's ring to the proper closed size, not the knuckle size. This is an important step and will ensure the curve of the top will be correct.

2. When possible, find out which way the customer wears their ring. Put the opening end of the locking arm facing the thumb. This will make the shank easier to operate for the customer.

3. Remove the top of customer's ring, making sure that there will be enough room for the hinge mechanism on the Lockshank.

4. Place the top of customer's ring on a mandrel and mark the end points of the cut shank. Then mark on the top of the Lockshank where the end point marks (you just made) are. The marks on the Lockshank should be centered on this top section.

5. Cut and remove the top of the Lockshank. The customer's ring top and the Lockshank should fit together at the proper size you want to achieve.

6. Solder the top to the Lockshank, file to blend and finish.

Helpful Hints

  •   Lockshanks only come in whole sizes, unless a custom. If you need other than whole size shank, there are ways to make the necessary adjustments. A larger Lockshank can be sized down to fit. However, our goldsmiths/installers prefer to use a smaller Lockshank and modify it by cutting open the solid top half at the middle, then sliding the Lockshank up the ring mandrel to the desired finished finger size. This method also works well, if the ring's design comes farther down the side. Using the smaller size will ensure the locking arm remains half the circumference of the ring. Please call or email for size recommendations before ordering.

  •   Lockshanks come in half millimeter widths. If the millimeter width of your customer's ring doesn't match with our standard size Lockshanks, a wider width can easily be narrowed to fit. Or, you can use a narrower shank that will result in a faster taper to the ring

  • Hinges have been assembled by laser, allowing the goldsmith to solder reasonably close to the hinge. Proper care must be taken not to freeze the hinge during installation. Permanent Magic Marker ink applied to the hinge will keep the solder from flowing into the mechanism.

  • Subsequent small sizing changes in a previously installed Lockshank can be done most easily where the original join/solder was made. If necessary, an installed Lockshank can be sized smaller by removing equal sized pieces from the receiving arm and the locking arm. The locking pin will have to be removed and replaced where it locks properly. Obtaining the proper size before starting will reduce the need for this procedure.

  • Lockshanks come with a rectangle cross section. Because the mechanism is not at the center, they can be filed to fit a rounded or comfort-fit ring shape. And wider sizes can be tapered slightly.

Technical Information

The locking pin fits snugly into the hole in the locking arm. It doesn't accidentally release, because the spring tension of the locking arm holds it in place. The locking arm is almost half the circumference of the ring; therefore, the spring tension uses the entire length of the locking arm to lock.


There is very little stress to the overall piece as it only has to travel the height of the locking pin. However, if the locking arm is forced into position, with the receiving arm partially closed, the locking arm will become out-of-round. If this happens the locking arm can be easily returned to its proper shape with careful bending.


There is little if any stress to the overall piece as it only has to travel the height of the locking pin. If the locking arm gets out-of-round and doesn't lock, it is easily returned to its proper shape with careful bending. When the locking arm is placed in position without the receiving arm fully in place the locking arm is out-of-round. If it looks like a part of the entire circle, with space for the groove in the receiving arm under it, then it will work as designed.


Lockshanks are created with precision on a computer and are cast from metal molds. The architecture on all sizes is uniform. The thickness of the ring is 1.8mm, and the thickness of the locking arm is 1.2mm. The hinge pins are ½ the thickness, allowing for even wear on both the pin and the hinge. The locking arm is ½ the width of all sies up to 5.5mm, and for the rest of the sizes it is 1/3 the width. The locking arm is designed to sick up very slightly above the grooved piece in the receiving arm at the very end, allowing for easy opening. Some customers prefer to have this slightly raised end flat and use a pen or small screw driver for opening.


With the hinge pins fused in rather than soldered, the goldsmith will not run the risk of cutting through the solder when it is necessary to file the Lockshank to fit the existing ring. Fusing instead of soldering also ensures the hinge won't fuse shut when installing

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