Urethane Molded Bearings Standard
Brand :
MISUMI
Caution
Product Description
Product Overview
Polyurethane is sintered onto the bearing to form a high-bond-strength coated bearing.
Various hardness levels of polyurethane and anti-static polyurethane are available.
Various hardness levels of polyurethane and anti-static polyurethane are available.
Dimensional Drawing
The bearings used in this product are not brand-guaranteed.Material Specification
| Type |  Material |  Hardness | Color | |
| Bearing | ||||
| Steel | Stainless Steel | |||
| E-UMBBK | E-UMSBK | Urethane | Shore A95 | Black |
| E-UMBBKW | E-UMSBKW | White | ||
| E-UMBB | E-UMSB | Shore A90 | Black | |
| E-UMBW | E-UMSW | White | ||
| E-UMBG | E-UMSG | Shore A70 | Black | |
| E-UMBGW | E-UMSGW | White | ||
| E-UMBL | - | Shore A50 | Black | |
| E-UMBLW | - | White | ||
| E-UMBD | - | Antistatic Urethane | Shore A90 | Grey |
Specification Overview
| Type | Material | Hardness | Color | Shape A | Shape B | |
| Bearing | ||||||
| Steel (SUJ2) | Stainless Steel (SUS440C) | |||||
| E-UMBBK | E-UMSBK | Urethane | Shore A95 | Black | Inner diameter: d3 to 25 Outer diameter: D10 to 65 A | Inner Diameter: d8 to 25 Outer Diameter: D30 to 65 |
| E-UMBBKW | E-UMSBKW | White | ||||
| E-UMBB | E-UMSB | Shore A90 | Black | |||
| E-UMBW | E-UMSW | White | ||||
| E-UMBG | E-UMSG | Shore A70 | Black | |||
| E-UMBGW | E-UMSGW | White | ||||
| E-UMBL | - | Shore A50 | Black | |||
| E-UMBLW | - | White | ||||
| E-UMBD | - | Antistatic Urethane | Shore A90 | Grey | ||
For the characteristics of conductive polyurethane, please refer to the right.Uses bearing precision JIS B 1514 Grade 0If rust prevention is required, please prioritize selecting products with stainless steel bearings.Material color is subject to the actual product. Urethane (white) may be yellowed due to aging.The bearing used in this product is not brand guaranteedFor detailed bearing dimensions, please click 
here.■ Electrostatic Polyurethane Properties
(Test conditions: Temperature 30°C, Humidity 60%)
The recorded values are measurement examples and are not guaranteed values.
| Volume Resistivity | 2.1 × 108Ω·cm |
| Surface Resistivity | 4.0 × 109Ω |
The recorded values are measurement examples and are not guaranteed values.Specification Table
■Shape A
Types marked with * are only applicable for d4–8.
Permissible load is a reference value.
■ Shape B
Permissible load is a reference value.
| Part Number |  D | Allowable Load N (kgf) | B | D1 | r (min.) | Mounting Dimensions | Bearing Used | |||||||
 Type |  d | Urethane | Silicone Rubber | Ds | R1 (max.) | |||||||||
| Shore A95 | Shore A90 | Shore A70 | Shore A50 | Shore A70 | (min.) | (max.) | ||||||||
| Polyurethane E-UMBBK E-UMSBK E-UMBBKW E-UMSBKW E-UMBB E-UMSB E-UMBW * E-UMSW E-UMBG * E-UMSG E-UMBGW * E-UMSGW E-UMBL E-UMBLW Electrostatic Polyurethane E-UMBD | 3 | 10 | 38 (3.8) | 28 (2.8) | 9 (0.9) | 4 (0.4) | 7 (0.7) | 3 | 7 | 0.1 | 3.9 | 4.1 | 0.1 | W683ZZA |
| 12 | 53 (5.4) | 34 (3.5) | 10 (1) | 6 (0.6) | 9.8 (1) | |||||||||
| *4 | 13 | 66 (6.7) | 44 (4.5) | 13 (1.3) | 7 (0.7) | 13 (1.3) | 4 | 9 | 0.15 | 5 | 5.2 | W684AX50ZZ | ||
| 16 | 79 (8.1) | 59(6) | 16 (1.6) | 6 (0.6) | 18 (1.8) | 5 | 13 | 0.2 | 5.6 | 6.2 | 0.2 | 624ZZ | ||
| *5 | 16 | 79 (8.1) | 16 (1.6) | 6.6 | 6.9 | WBC5-13ZZ | ||||||||
| 20 | 102 (10.4) | 78(8) | 20(2) | 9 (0.9) | 24 (2.4) | 16 | 0.3 | 7 | 7.6 | 0.3 | 625ZZ | |||
| *6 | 20 | 114 (11.7) | 23 (2.3) | 15 (1.5) | 15 | 0.2 | 7.6 | 7.8 | 0.2 | 696ZZ | ||||
| 28 | 218 (22.2) | 157(16) | 44 (4.5) | 39(4) | 47 (4.8) | 6 | 19 | 0.3 | 8 | 9.5 | 0.3 | 626ZZ | ||
| *8 | 28 | 208 (21.2) | 42 (4.3) | 35 (3.6) | 7 | 22 | 10 | 12.2 | 608ZZ | |||||
| 30A | - | 176(18) | 81 (8.3) | 65 (6.7) | 53 (5.4) | 608ZZ | ||||||||
| 10 | 30A | 94 (9.6) | 51 (5.2) | 8 | 26 | 12 | 13.5 | 6000ZZ | ||||||
| 40A | - | 274(28) | 136 (13.9) | 93 (9.5) | 82 (8.4) | 9 | 30 | 0.6 | 14 | 16 | 0.6 | 6200ZZ | ||
| 15 | 40A | 122 (12.4) | 96 (9.9) | 32 | 0.3 | 17 | 19 | 0.3 | 6002ZZ | |||||
| 45A | - | 343(35) | 109 (11.1) | 102 (10.5) | 103 (10.5) | 11 | 35 | 0.6 | 19 | 20 | 0.6 | 6202ZZ | ||
| 20 | 45A | 130 (13.3) | 98 (10.1) | 9 | 37 | 0.3 | 22 | 24 | 0.3 | 6904ZZ | ||||
| 55A | - | 490(50) | 225 (22.9) | 176 (18.1) | 147(15) | 14 | 47 | 1 | 25 | 28 | 1 | 6204ZZ | ||
| 25 | 65A | - | 750(70) | 333(34) | 250 (25.8) | 226(23) | 15 | 52 | 30 | 32 | 6205ZZ | |||
Types marked with * are only applicable for d4–8. Permissible load is a reference value.■ Shape B
| Part Number | D | Allowable Load N (kgf) | B | D1 | B1 | r (min.) | Mounting Dimensions | Bearing Used | |||||||
| Type | d | Urethane | Silicone Rubber | Ds | R1 (max.) | ||||||||||
| Shore A95 | Shore A90 | Shore A70 | Shore A50 | Shore A70 | (min.) | (max.) | |||||||||
| Polyurethane E-UMBBK E-UMSBK E-UMBBKW E-UMSBKW E-UMBB E-UMSB E-UMBW E-UMSW E-UMBG E-UMSG E-UMBGW E-UMSGW E-UMBL E-UMBLW Electrostatic Polyurethane E-UMBD | 8 | 30 | 248 (25.3) | 176(18) | 81 (8.3) | 65 (6.7) | 53 (5.4) | 11 | 22 | 7 | 0.3 | 10 | 12.2 | 0.3 | 608ZZ |
| 10 | 30 | 201 (20.5) | 94 (9.6) | 51 (5.2) | 26 | 8 | 12 | 13.5 | 6000ZZ | ||||||
| 40 | 412(42) | 274(18) | 136 (13.9) | 93 (9.5) | 82 (8.4) | 30 | 9 | 0.6 | 14 | 16 | 0.6 | 6200ZZ | |||
| 15 | 40 | 369 (37.6) | 122 (12.4) | 96 (9.9) | 12 | 32 | 0.3 | 17 | 19 | 0.3 | 6002ZZ | ||||
| 45 | 534 (54.5) | 343(35) | 109 (11.1) | 102 (10.5) | 103 (10.5) | 15 | 35 | 11 | 0.6 | 19 | 20 | 0.6 | 6202ZZ | ||
| 20 | 45 | 391 (39.9) | 130 (13.3) | 98 (10.1) | 12 | 37 | 9 | 0.3 | 22 | 24 | 0.3 | 6904ZZ | |||
| 55 | 674 (68.7) | 490(50) | 225 (22.9) | 176 (18.1) | 147(15) | 18 | 47 | 14 | 1 | 25 | 28 | 1 | 6204ZZ | ||
| 25 | 65 | 999 (101.9) | 750(70) | 333(34) | 250 (25.8) | 226(23) | 19 | 52 | 15 | 30 | 32 | 6205ZZ | |||
Permissible load is a reference value.Product Features
Feature 1: Urethane part is made of Japanese material, with excellent abrasion resistance.
Feature 2: Each model has a reference allowable load, making selection more convenient.
Feature 3: Urethane is partly sintered on bearing, which is not easy to fall off, and it is suitable for various contact methods.
Feature 2: Each model has a reference allowable load, making selection more convenient.
Feature 3: Urethane is partly sintered on bearing, which is not easy to fall off, and it is suitable for various contact methods.
Precautions
①Material color is subject to the actual product. Urethane (white) may be yellowed due to aging.
②MISUMI does not guarantee the bearing brand.
(3) For anti-rust performance and maintenance of metal materials and surface treatment, please click
here.
(4) About urethane discoloring
Urethane will darken its color by absorbing UV rays or illuminating light. This phenomenon is called yellowing. But it does not affect its physical properties, please fully understand when using it.
(5) Hydrolysis characteristics of urethane
If urethane is used for a long time in a moist or humid environment, it will be hydrolyzed and deteriorated.
It is recommended to manage the temperature and humidity of the warehouse and operating environment in areas with high humidity to extend the service life of the product.
(6) Changes in Product Condition After Hydrolysis
· Polyurethane surface becomes sticky
· Irreversible marks appear when pressed lightly with a fingernail
· Polyurethane hardness decreases
· Polyurethane dries and cracks, easily disintegrates into powder
(7) Urethane dimension change
Urethane dimension will change with the surrounding temperature, but the amount of change is not large, and it can be restored to its original dimension after a few hours at room temperature.
②MISUMI does not guarantee the bearing brand.
(3) For anti-rust performance and maintenance of metal materials and surface treatment, please click
here.(4) About urethane discoloring
Urethane will darken its color by absorbing UV rays or illuminating light. This phenomenon is called yellowing. But it does not affect its physical properties, please fully understand when using it.
| New urethane | Yellowed urethane |
 |  |
(5) Hydrolysis characteristics of urethane
If urethane is used for a long time in a moist or humid environment, it will be hydrolyzed and deteriorated.
It is recommended to manage the temperature and humidity of the warehouse and operating environment in areas with high humidity to extend the service life of the product.
(6) Changes in Product Condition After Hydrolysis
· Polyurethane surface becomes sticky
· Irreversible marks appear when pressed lightly with a fingernail
· Polyurethane hardness decreases
· Polyurethane dries and cracks, easily disintegrates into powder
| Hydrolyzed urethane |
 |
Urethane dimension will change with the surrounding temperature, but the amount of change is not large, and it can be restored to its original dimension after a few hours at room temperature.
Example of Use
| Example of Use① | Role of Product |
| ■ Wire crimping mechanism of winding machine | Urethane has excellent abrasion resistance and long service life Urethane is available in a wide variety of hardness, and different hardness can be selected according to the actual press-fit force required. |
 | |
| Example of Use② | Role of Product |
| ■ Workpiece transfer assistance | The bearing carries male threads and is easy to disassemble. The bearing has urethane to protect the workpiece from scratches. |
 | |
| Example of Use③ | Role of Product |
| ■ Gluing mechanism | When the adhesive contains chemical properties, silicone rubber can be selected. Softer urethane can be selected to increase the adhesion surface between the roll paper and the workpiece. |
 |
Related Industries
Related Products
| (Economy series) Urethane plate Customizable type | Stopper bolt | Cantilever Pin, External Thread Mounting, With Retaining Ring Groove | ||
 |  |  | ||
| Typical model: E-UTSN8-300 | Typical model: UST3-15 | Typical model: E-FXAA10-25-F18 |
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