Polyurethane rubber washers

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Back to the Category Discs/Sleeves (Rubber, Caoutchouc, Foam, Felt)

Technical Drawing - Polyurethane Rubber Washers

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Available dimensions and tolerances can be found under the tab More information.

Basic Properties (e.g., material, hardness, coating, tolerance) - Polyurethane Rubber Washers

Type	Standard Grade	Precision Grade	Material	Hardness	Photo No., Color
Standard	URWS	UAWS	Standard Urethane (Ether Polyurethane)	Shore A95	Natural Color
	URWH	UAWH	Standard Urethane (Ether Polyurethane)	Shore A90
	URWM	UAWM	Standard Urethane (Ester Polyurethane)	Shore A70
	URWL	-	Standard Urethane (Ester Polyurethane)	Shore A50
	URHWH		Heat Resistant Urethane	Shore A90	Brown
	UREWH		Abrasion Resistant Urethane	Shore A90	Dark Brown
	UREWM		Abrasion Resistant Urethane	Shore A70	Dark Brown
Configurable Type	URFS	UAFSN	Standard Urethane (Ether Polyurethane)	Shore A95	Natural Color
	URFH	UAFH	Standard Urethane (Ether Polyurethane)	Shore A90
	URFM	UAFM	Standard Urethane (Ester Polyurethane)	Shore A70
	URFL	-		Shore A50
	URFY			Shore A30
	URFHE		Antistatic Polyurethane	Shore A90	Gray
	URFME			Shore A70
	URFLE			Shore A50
	URHFH		Heat Resistant Urethane	Shore A90	Brown
	VULFH		Super Abrasion Resistant Urethane Vulkollan^®	Shore A92	Beige
	VULFM		Super Abrasion Resistant Urethane Vulkollan^®	Shore A68	Beige
	UREFH		Abrasion Resistant Urethane	Shore A90	Dark Brown
	UREFM		Abrasion Resistant Urethane	Shore A70	Dark Brown
	URCES		Ceramic Urethane	Shore A95	Gray
	URCEH			Shore A90
	URCEM			Shore A70

For features of Ceramic Urethane, see >> P.389.
Urethane turns yellow by aging, but physical property or characteristics remain unchanged.
For Yellow Discoloration of Urethane, see P.392.
Depending on the production lot, the side face may show marks from machining.
■Characteristic Values of Antistatic Urethane

Specific Volume Resistivity	2.1x10⁸Ω • cm
Surface Resistivity	4.0x10⁹Ω

(Conditions: Temperature 30°C Humidity 60%)
All other properties are equal to those of urethane of the same hardness.

Further specifications can be found under the tab More information.

Composition of a Product Code - Polyurethane Rubber Washers

■Standard

Part Number	-	V	-	T
URWL20	-	10	-	5

■Configurable Type

Part Number	-	D	-	V	-	T
URFM URFH	- -	D19 D35	- -	V3 V18	- -	T4.5 T8.0

General Information - Polyurethane Rubber Washers

Rubber washer - rubber sleeve with counterbore - rubber sleeve - rounded rubber damper - foam washer - foam sleeve

Selection details of rubber discs/rubber sleeves

- Material: heat-resistant antistatic, abrasion-resistant, highly abrasion-resistant, low-impact polyurethane rubber (PU/PUR), Vulkollan, ceramic polyurethane rubber, nitrile rubber sponge (NBR), chloroprene rubber (CR), ethylene cautchouc (EPDM), silicone rubber (SI), fluoro-cautchouk (FPM), hard rubber, butyl rubber (IIR), natural rubber, nitrile rubber foam, chloroprene rubber foam, polyethylene foam (EPDM foam), EPT sealing material, Silicone rubber foam, fluoro-rubber foam, special polyurethane foam (SOFRAS), polyester felt, polyester felt

- Hardness: Asker C5 to C35, Asker F75 to F85, Shore A15 to A95

- Versions: disc with bore holes, sleeves with holes, sleeves without holes, sleeves with counterbores, sleeves with external threads, sleeves with collar, dampers with round tip, dampers with conical tip

- Inner diameter: up to 80 mm

- Outer diameter: 6 to 100 mm

- Length: 1 to 10 mm (discs), 10 to 500 mm (sleeves)

Description/Basics

Rubber discs and rubber sleeves, also called rubber buffers, are generally used for vibration damping and impact damping. Rubber sleeves are often used as stopper buffers in industry. Rubber discs are occasionally also used as seals.
Discs and sleeves made of natural rubber are offered in different materials and hardnesses.

While rubber discs are often used for sealing, rubber sleeves are increasingly used as rubber buffers, stopper buffers, or elastomer dampers. MISUMI already offers such a rubber sleeve as a rubber buffer with external thread or counterbore for fastening.
The rubber buffer is also available with a vulcanized metal collar, which not only allows for a firm assembly, but also sits in the anti-backlash rubber sleeve. These adhesives are also available separately. In addition to the material of the rubber buffer, the shape of the stopper buffer is also responsible for the damping characteristic. conical or rounded rubber buffers can also develop a progressive damping curve that generates increasing damping.

Depending on the application and environmental influences, MISUMI offers rubber discs and rubber sleeves in various basic materials with the appropriate resistance. An overview of the intended uses of the respective natural rubber can be found under Natural Rubber Properties as PDF .
The rubber buffers made of polyurethane rubber are also available in an antistatic version. The specific resistance of antistatic rubber discs and rubber sleeves prevents static charging. This can prevent damage to electronic components.
For high temperature applications, MISUMI offers heat-resistant polyurethane rubber, which can withstand temperatures of approx. +120°C (see Specifications for further information).
Vulkollan, on the other hand, is a very abrasion-resistant polyurethane, the abrasion resistance of which is six times higher compared to conventional polyurethane.
Ceramic polyurethane washers and sleeves contain ceramic particles. Despite a low Shore hardness, they can be machined to give them a smooth surface.
MISUMI also offers foam discs and foam sleeves. In addition to damping, these can also have sealing properties. This is achieved by the foam discs due to the closed or semi-closed pores (EPT sealer) inside the material. For semi-closed pores, the pores are sealed under load. Therefore, the type of pores must always be observed for foams in order to select the appropriate foam depending on the application. You can get help for your selection by following this link.
Further properties of natural rubbers and foams can be found in the Properties PDF.
In addition to the aforementioned basic materials, the MISUMI online shop also offers felt discs and felt sleeves. Felt has the properties of capillary action and can absorb and release liquids such as oil. In addition, felt is gentle on sensitive surfaces and is often used for polishing surfaces.

A antivibration materials can also be used for two-sided mounting to dampen vibration.
MISUMI also offers vibration damping and impact damping materials in the form of sheets.

Application Examples - Polyurethane Rubber Washers

Application example - rubber roller with rubber sleeve - rubber roller with roller bearing - roller bearing with axle - running wire

Application example: rubber roller
(1) Rubber sleeve, (2) Roller bearing, (3) Axles / Rotary Shafts, (4) Catch ropes

Application example - cylinder stopper buffer - cylinder end stop - rubber buffer - rubber buffer for cylinder -

Application example: cylinder stopper buffer
(1) Rubber washer, (2) Floating joints, (3) Pneumatic cylinder

Industrial Applications

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

Part Number:

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Data to be displayed: 30; 45; 60

Part Number
VULFM-D[6-45/1]-V0-T[3-10/0.5]
VULFM-D[6-45/1]-V[2-41/1]-T[3-10/0.5]

Part Number	Minimum order quantity	Volume Discount	Standard Shipping Days ?	RoHS	Detailed Material	Hardness (shore, asker)	Precision	Type	O.D. D (Ø)	I.D. V (Ø)	Thickness T (mm)
	1		9 Days	10	Super Abrasion Resistant Vulkollan®	Shore A68	Standard Grade	Configurable Type	6 ～ 45	0	3 ～ 10
	1		9 Days	10	Super Abrasion Resistant Vulkollan®	Shore A68	Standard Grade	Configurable Type	6 ～ 45	2 ～ 41	3 ～ 10

Back to the Category Disks/Sleeves (Rubber, Caoutchouc, Foam, Felt)

Technical Drawing - Polyurethane Rubber Washers

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Specification Tables - Polyurethane Rubber Washers

■Standard

Part Number			V													T
Type		D	Selection													Selection
Standard Grade		6	2													1	2	3
URWS	(Standard Shore A95)	8	2	3	4											1	2	3
URWH	(Standard Shore A90)	10		3	4	5	6									1	2	3	5
URWM	(Standard Shore A70)	12			4	5	6	8								1	2	3	5
URWL	(Standard Shore A50)	15			4	5	6	8	10							1	2	3	5
URHWH	(Heat Resistant Shore A90)	20				5	6	8	10	12								3	5	10
UREWH	(Abrasion Resistant Shore A90)	25				5	6	8	10	12	16	20						3	5	10
UREWM	(Abrasion Resistant Shore A70)	30				5	6	8	10	12	16	20						3	5	10
Precision Grade		35						8	10	12	16	20	25						5	10
UAWS	(Standard Shore A95)	40						8	10	12	16	20	25	30					5	10
UAWH	(Standard Shore A90)	50						8	10	12	16	20	25	30					5	10
UAWM	(Standard Shore A70)	60								12	16	20	25	30	40				5	10

■Configurable Type

Part Number				D	V	T
Type				1mm Increment	1mm Increment	0.5mm Increment
Standard Grade				6~15	0 (No Hole) 2~41 (V≤D-4)	1.0~5.0
URFS	(Standard Urethane Shore A95)	URHFH	(Heat Resistant Urethane Shore A90)	6~15		5.5~10.0
URFH	(Standard Urethane Shore A90)	VULFH	(Vulkollan^® Shore A92)	16~30		1.0~5.0
URFM	(Standard Urethane Shore A70)	VULFM	(Vulkollan^® Shore A68)	16~30		5.5~10.0
URFL	(Standard Urethane Shore A50)	UREFH	(Abrasion Resistant Urethane Shore A90)	31~45		1.0~5.0
URFY	(Standard Urethane Shore A30)	UREFM	(Abrasion Resistant Urethane Shore A70)	31~45		5.5~10.0
URFHE	(Antistatic Polyurethane Shore A90)	URCES	(Ceramic Urethane Shore A95)	46~60	0 (No Hole) 10~70 (V≤D-4)	1.0~5.0
URFME	(Antistatic Polyurethane Shore A70)	URCEH	(Ceramic Urethane Shore A90)	46~60		5.5~10.0
URFLE	(Antistatic Polyurethane Shore A50)	URCEM	(Ceramic Urethane Shore A70)	61~80		1.0~5.0
Precision Grade				61~80		5.5~10.0
UAFSN	(Standard Urethane Shore A95)			81~100	0 (No Hole) 20~80 (V≤D-4)	1.0~5.0
UAFH	(Standard Urethane Shore A90)					1.0~5.0
UAFM	(Standard Urethane Shore A70)					5.5~10.0
						5.5~10.0

When V=0, there is no hole. Vulkollan^® is available for T=3.0 or more. For Ceramic Urethane, T=5.0 or more.

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Basic information

Shape	Washers (Thickness 1mm~10mm)	Material	Urethane

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Basic Attributes

Detailed Material
- Standard Urethane
  - Ester Polyurethane
  - Ether Polyurethane
- Heat Resistant Urethane
- Antistatic Urethane
- Abrasion Resistant Urethane
- Super Abrasion Resistant Vulkollan®
- Ceramic Urethane
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Precision
- Precision Grade
- Standard Grade
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Type
- Configurable Type
- Standard Type
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O.D. D(Ø)
6

8

10

12

15

20

25

30

35

40

50

60
[6-45/1Ø Unit(s)]
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I.D. V(Ø)
0

2

3

4

5

6

8

10

12

16

20

25

30

40
[2-41/1Ø Unit(s)]
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Thickness T(mm)
1

2

3

5

10
[3-10/0.5mm Unit(s)]
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Type
- UAFH
- UAFM
- UAFSN
- UAWH
- UAWM
- UAWS
- URCEH
- URCEM
- URCES
- UREFH
- UREFM
- UREWH
- UREWM
- URFH
- URFHE
- URFL
- URFLE
- URFM
- URFME
- URFS
- URFY
- URHFH
- URHWH
- URWH
- URWL
- URWM
- URWS
- VULFH
- VULFM
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Hardness (shore, asker)
Shore A30

Shore A50

Shore A68

Shore A70

Shore A90

Shore A92

Shore A95
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Optional Attributes

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Frequently Asked Questions (FAQ)

Question:
What is Vulkollan?: Answer:
Vulkollan is a highly abrasion-resistant polyurethane rubber that has high wear resistance. It is one of the high-performance rubbers that has little pressure deformation and can withstand high impact forces. In addition, Vulkollan has a high tear strength. However, over time Vulkollan may change its colour, but without losing its mechanical properties.
Question:
Which rubber is resistant?: Answer:
Vulkollan is an abrasion-resistant material. It has an approx. six-fold higher abrasion resistance than conventional polyurethane materials. Vulkollan is particularly suitable for applications where high abrasion is expected.
Question:
Which rubber washer is oil-resistant?: Answer:
A rubber disc made of nitrile rubber (NBR) is highly resistant to various oils. This material is often used as a seal due to its good heat resistance and abrasion resistance.
Question:
Can a rubber sleeve be glued?: Answer:
A rubber sleeve or rubber disc can be stuck in or glued in. However, it must be ensured that the correct adhesive is selected in relation to the material of the elastomer. If this is not taken into account, the adhesive does not have the desired effect or even attack and degrade the elastomer. In addition, the adhesive should support the respective property of the material, e.g., antistatic or temperature resistance.