Everything about eyeglass hinge:

What are eyeglass hinges?

Eyeglass hinges play one vital role in one pair of eyeglass frame, it connects eyeglass frame front and eyeglass temples or arms, and it relates how long your eyeglass could be on your face.

How many types of eyeglass hinges are there?

Since the hinges are made of different material, there are nickel hinges, copper hinges, stainless steel hinges and titanium hinges and casting berylium hinges etc ; among them, nickel alloy eyeglass hinges and stainless steel hinge are more popular in the market as it's easier to be processed,punching,milling,drilling etc.
From the material of frame which hinges are used on: there are hinges for wood eyeglass frames, hinges for plastic frames, hinges for titanium eyeglass,for hinges for combination frames,which has the plastic frame with metal temples, or metal front with acetate arms etc.
Seeing from if they are with spring hinges: we call hinges normal eyeglass hinges, which are without springs inside, or eyeglass spring hinges which could help temples adjusts the opening angle itself to suit your face better.

Here comes some important hinges for different eyeglass frames below:

Hinges for wood frames:

The main problem is to solve the welding problem for hinges for wood frames, so they are usually designed by glue on, screw on or plug in installing ways instead of solder-on. For example, for screw on types, you could consider: TSH-53,TSH-52,TSH-55-A,TSH-59-A etc; for glue on, please consider TSH-76,TSH-66,TSH-56 etc; while for plug in, TSH-67,TSH-68,ZSH-08 are. Most of hinges are made of high nickel alloy with color coating, screws are usually enclosed free.

universal hinges for any frames:

This must be the most fantastic hinges you could ever find in the world, as they could suit any material of frames, no matter it's made of wood, horn, plastic or titanium, aluminum etc, and no matter it's made by hand, machine, or 3D-printing ways. The installing ways are screw-on, riveting-on, no any welding problem exists as well.
Various sizes are available from 3.0mm to 8.0mm width, most of them are round shapes. If you like 4.0mm hinges, then please check TH-22,TH-26, TH-39,TH-44 etc. if you prefer 6.0mm width, please consider TH-27, TH-29, TH-34,TH-37 etc; 8.0mm hinges, TH-25,TH-28,TH-36,TH-38 etc are recommended.

hinges for plastic frame:

These hinges are also called sunk-in hinges, hidden hinges etc as their feet are usually inserted into the plastic frames and invisible. They are mostly made of high nickel lead free material. As per the front hinge parts are installed from side or straight to front, they could be devided to 90 or 180 degree hinges. Their shapes could be square or round end. Various sizes from : 2.5mm to 10mm width usually.

front hinges replacement for plastic frame:

They could usually be found in frame fronts, connecting with normal hinges or springs hinges on the temples. Different shapes are available also, there are 90 or 180 degree hinges as well. Most of them are made of lead free nickel alloy, with silver color coating. Female or made hinges are available. For male hinges, the single barrel varies from 1.0mm to 1.6mm etc.

solder on hinges for metal eyeglass frame:

These hinges are completely designed for metal frames, nickel frame, stainless steel frame or titanium frames. There are normal hinges without springs inside such as TH-135,TH-111 etc or spring hinges such as TSH-13,TSH-20,TSH-162 etc.
For nickel and stainless steel frames, please consider nickel or stainless steel hinges;
for titanium frames, titanium normal or spring hinges are recommended.
Size: from 1.6mm to 8.0mm ;
Material: nickel alloy, stainless steel, titanium.

How could I choose my eyeglass hinges ?

First, please check your material of eyeglass frame: If your frame is made of plastic, hinges for plastic frames will be recommended firstly.
If your frames is made of wood, please check the hinges for wood,which includes spring hinges for wood frames,and univeral hinges for wood frames (without springs).
If your frames are made of metal, you need choose the hinges which could be soldered on, this kind of hinges bottom is flat and usually without any reaching out feet like hinges for plastic frames,such as below.
While aluminum frames are one exception. Though it's metal frame, while the material is unable to be soldered on, so usually, for aluminum frames, their springs are inserted into recess of frmae and be punched into the temple body directly for spring hinge. Or you could use universal hinges, or slide on hinges such as TSH-02, TSH-04 etc.
Second, please check how would you like to install the hinges on ?
If you are one skilled eyeglass manufacturer, and got proper hinges installing machine, you could select hinges as you like.
such as for plastic eyewear frames, usually heating installed hinges are recommended which have the feet which could be inserted into front or temples by heat.
While if you are only one hobbyist, and want to make your own frame easier, we recommend you to choose screw-on eyeglass hinges easier.

What kind of machine is necessary for installing hinges?

For plastic frame, one hinge inserting machine is necessary;
For wood frames, usually one vertical driller,one cutter is necessary for making recess, glue and screws as well for installing.