Polyurethane Rubber Pushers, Tapped Type

Brand :

MISUMI

Caution

Product Description

Product Overview

Mainly used for flexible workpiece fixation scenarios. The polyurethane section at the front end provides a flexible clamping force. At the same time, it is also widely used as a stopper.

Dimensional Drawing

■ Flat Shape	■ Round

Material Table

■ Specifications Overview Table

Type		Pressing block		Metal core	Outer Diameter D
Flat head type	Round	Hardness	Material	Material	Outer Diameter D
E-URLH	E-URSH	Shore A90	Ester-based Polyurethane	Stainless Steel	8 to 40
E-URLM	E-URSM	Shore A70	Ester-based Polyurethane
E-URLL	E-URSL	Shore A50	Ester-based Polyurethane

Polyurethane is thermally bonded to the metal core.

Polyurethane may discolor over time but there is no effect on properties.

Features of ether-based polyurethane: It excels in repeat use and shock-absorbing properties, andcan be used for applications such as mechanical stoppers.

Ester-based polyurethane: Its features are similar to those of ether-based polyurethane, but with better abrasionresistance. However, do not use it in high humidity or in water. This will cause hydrolysis of Polyurethane.

Specification Table

Part Number			L	M x pitch	(SR₁)	(R₂)	ℓ₁	ℓ₂	W
Type		D
Flat Head Type E-URLH E-URLM E-URLL	Round E-URSH E-URSM E-URSL	8	12	M3×0.5	8	1	5	4	7
		10	15	M4×0.7	10				8
		12	16	M5×0.8	12	2			10
		16	20	M6×1.0	16		6	5	14
		20	25	M8×1.25	20	3	8	6	17
		25	30	M10×1.5	25		10	8	22
Polyurethane rubber is thermally bonded to the metal core. Polyurethane rubber may discolor over time, but this does not affect the material's properties or characteristics.

■Product Weight Table

Type	D	Weight (g) Reference Value
Flat Head Type E-URLH E-URLL E-URLM	8	3
	10	4
	12	7
	16	14
	20	27
	25	52
Arc Type E-URSH E-URSL E-URSM	8	3
	10	4
	12	7
	16	15
	20	27
	25	51

Product Features

Feature 1: Polyurethane maintains excellent mechanical strength while providing elasticity. When clamping workpieces with relatively soft surfaces, it is less likely to leave indentations or even damage the surface of the workpiece.
Feature 2: Polyurethane is sintered onto the surface of the metal core, which provides higher polyurethane adhesion compared to press-fit or bonded products, making it more suitable for applications with complex force directions.
Feature 3: Urethane sintered products are less likely to transmit vibration and sound.
Feature 4: Polyurethane has low dust generation, and since it does not contain carbon, it is a material that is not prone to color transfer. (*Natural color only)
Feature 5: Multiple hardness options available depending on the application scenario.

Hardness	Equivalent to
Shore A95	Golf Ball
Shore A90	Baseball
Shore A70	Softball
Shore A50	Eraser
Shore A30	Bicycle Inner Tube
Shore A15	Konjac Jelly

Permissible hardness range: ±5

This series only includes Shore A hardness 30, 50, 70, 90

■ Polyurethane Shock Absorbing Material Color Chart

Natural

Polyurethane Color Difference and Yellowing Changes

Polyurethane is subject to color variation; the above colors are for reference only.

■ Reference: Bending Test for Products of Various Hardness
Description of Different Polyurethane Hardness Levels

■ Test Conditions

Material	Standard urethane
Thickness	5 mm
Width	30 mm
Length	40 mm

Apply a 5N load (tension) using a force gauge

Precautions

(1) When using ester-based polyurethane, please do not use it in high humidity or in water. This results in hydrolysis of urethane.
(2) 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

(3) 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.

(4) Changes in Product Condition After Hydrolysis
· Polyurethane surface becomes sticky
· Irreversible marks are left when pressed lightly with a fingernail
· Polyurethane hardness decreases
· Polyurethane dries and cracks, easily disintegrating into powder

Hydrolyzed urethane

(5) 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.

Example of Use

Detailed example of MISUMI urethane block compression damage prevention detection mechanism

Organization Name: Pallet Position Confirmation Process
Organization Function:
Confirm the positioning of the non-metal tray using the workpiece inspection component.
Role of urethane pressing block:
Install at the front end of the contact sensor to prevent pressure damage to the contact surface of the workpiece (non-metal tray).

For more information, please click

No.000051 Pallet Position Confirmation Process

Application Industries

Electronic		Automotive

Smart phone		Semiconductor

Resin Collar Standard	Stopper bolt with urethane Straight type	Urethane molded bearing Inner wheel protruded For heavy load

Representative Model: E-CLJJ10-16-20.0	Representative Model: E-UST8-40	Representative Model: E-UMRHW40
Advantages: Optional inner and outer diameter and height, better price	Suitable for conveying heavy load workpieces, compact tip, usable in narrow spaces	Suitable for conveying heavy load workpieces