Ball Bearings

A Variety of Designs to Meet a Variety of Applications

Bearing series
Product information
How to identify the model number (product name) of a plastic bearing

Bearing series 

TOK - ball bearing

It’s been half a century since we developed the first plastic bearing in the industry. We are pleased to say that our bearings have been used by customers from a wide range of industries. To meet various demands, we provide various bearing materials, including POM (Polyacetal), PE(Polyethylene), PEEK (PolyEtherEther-Ketone), PVDF(Polyvinylidene fluoride), SUS(Stainless), and Ceramic for the following applications: Refrigerators, cabinets, copying machines, cash machines, registers, arcade machines, machine tools, etc.
With TOK’s over 75 years of expertise and proprietary experience in radial ball bearings, we can guarantee that we will fully meet your specific application with our products. TOK can provide the bearings' outer races in numerous configurations and can use both standard and custom-designed bearings to meet your requirements. We would be happy to take your concept and specifications to design and manufacture a customized bearing for your needs.

TOK Series Purpose/Material
D series Standard Plastic Bearings (all POM), up to 20kg 
I series Heavy Duty Plastic Bearings (POM with Steel inner), up to 60kg
A series All Steel Bearings (SUJ2, STKM, SWCH), up to 80kg
DT series Steel Bearing with POM Outer race, up to 80kg
ER series Special Needs: Anti-Static Bearings
PE series Special Needs: Anti-Acid/Anti-Alkali Bearings
S series Special Needs: All Stainless Bearings
PK/PV series Special Needs: PEEK/PVDF Bearings
C series Special Needs: All Ceramic Bearings
K series Custom Desinged Bearings (varies material per request )

Product information


How to identify the model number (product name) of a plastic bearing
In case you need to identify the name of bearing which is made by TOK, you can use the identify method below.
If you have a bearing that has different part configration from Step 0, please contact us via contact form.
TOK will provide you the product name.

Step 0 : Components of bearing
           You can proceed the next step if the bearing you have is the same parts composition.
Step1 : Identify the shape of the outer race and measure the dimensions of ①.
Step 2 : Check the kind of inner race and measure the dimensions of ②.
Estimate method for dimension②
The dimensions of ② can be calculated approximately by the "inner race width - outer race width" shown in the following figure.

Using a caliper or ruler, measure the two areas shown in the figure and calculate.
In the case of the following figure, the inner race width is 8.87mm and the outer race width is 6.84mm.
Since "8.87mm - 6.84mm = 2.03mm," we can estimate that ② is 2mm.

Step 3 : Apply the information you checked in Step 1 and Step 2 to the product name.
         You can identify the product by applying the shapes and dimensions you checked in steps 1 and 2.
The Others

 (1) Additional information 
     The following additional information may be added to the end of the product name. 
    "GN" means that the bearing has no grease.
    "JH" means that the inner-race has the hexagonal hole.

(2) Notes
 -The number on the side of outer race is the patent number and no related
to the product name.
 -Even though the shape of outer race is grooved, it may also have a "DR"
engraved mark on it. This is because DR series outer race is used and also
it is grooved the outer diameter.

If you want to know more details, please refer to the "BEARING Product Name Composition Table" in the general catalog.