Rubber-metal elements / cylindrical, stepped / internal thread, external thread / eye plate, stainless steel / CR, NBR conductive / A60 (EBGONP40250)

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MISUMI

Product Details:

Manufacturer part number: EBGONP40250

Brand: MISUMI

Price: 17.39 €

Delivery time: Same day

Technical Data:

Maximum Operating Load: 700 N

Properties: Durability / Weather Resistance / Water Resistance / Oil Resistance / Ozone Resistance

Connection Type: Tappeds, Plate Stopper Type

Connecting Screw M: 8

Height H: 25 mm

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EBGONP40250

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Back to the Category Antivibration Materials

Technical Drawing - Rubber-Metal Elements

Electroconductive Antivibration Rubber Mounts/One End Threaded/One End Tapped:Related Image

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

Basic Properties (e.g., material, hardness, coating, tolerance) - Rubber-Metal Elements

■Tapped and Threaded Studs

Type	Material		Hardness	Accessory
	Main Body	Metal Fitting
DBGONA	Conductive Nitrile Rubber	EN 1.4301 Equiv.	Shore A60	Nut, Spring Washer 1 pc. each
EBGONA	Chloroprene Rubber

■ Tapped Stud, Plate Mount

Type	Material		Hardness
	Main Body	Metal Fitting
DBGONP	Conductive Nitrile Rubber	EN 1.4301 Equiv.	Shore A60
EBGONP	Chloroprene Rubber

Further specifications can be found under the tab More information.

Composition of a Product Code - Rubber-Metal Elements

Part Number

DBGONA15150

General Information - Rubber-Metal Elements

Oscillation damper - stop buffer - vibration damper - rubber metal buffer - rubber metal elements - rubber discs - product assortment

Oscillation Damper/Stop Buffer/Vibration Damper Selection Details

- Material: natural rubber (NR), chloroprene rubber (CR), nitrile rubber (NBR), silicone (SI)

- Mounting plate: steel, stainless steel

- Hardness: Shore A45, A60, C19.7, C25.3, C29.8, C30, C38.0, C44, C44.3, C44.5, C50, C52.5

- Properties: weather resistant, water resistant, oil resistant, ozone resistant, electrically conductive

- Height: 3 to 34 mm

- Thread: M4 to M8

- Load: 1.77 N to 1225 N

Description/Basics

Rubber metal elements, or also called rubber metal buffers, are generally used for oscillation and vibration damping. They are not only used to reduce structure-borne noise (transmitting vibrations), but also demonstrably reduce noise generation. This property plays an increasingly important role in the industry and mechanical engineering, as noise reduction plays an increasingly important role.

The vulcanized rubber buffers are generally fitted with mounting plates on one side or both sides. The mounting plates are provided with internal threads, external threads or through holes. Depending on the installation requirements, MISUMI offers the appropriate vibration damper.
MISUMI offers vibration-damping rubber in various materials, with different advantages and properties. Not only the respective loads and vibration frequencies must be observed when selecting rubber buffers, but depending on the application the resistance to environmental influences (e.g., oil resistance) also plays an important role. The design of the damping material also influences the damper characteristic, which can develop a degressive or progressive damping effect. It should be noted that vibration dampers do not allow complete isolation and decoupling of vibrations, but this is greatly reduced. You can find further details under the tab More information.

An overview of the different vibration dampers and materials can be found in the selection process as a PDF .

Rubber metal elements are often used to reduce vibration and noise in a wide variety of applications in almost all industries. Motors, pumps, and other vibration generating units are often elastically supported with vibration dampers.

Natural Rubber (NR)
Rubber metal elements made of natural rubber offer the advantage that they form a low heat development (low "heat-build-up" values) during internal creep. However, a vibrating damper made of natural rubber should not come into contact with oil, as this will cause the rubber buffer to swell and become porous, which can reduce its damping properties.

Chloroprene Rubber (CR)
Vibration dampers made of chloroprene rubber have an excellent weather resistance and good oil and ozone resistance. However, rubber buffers made of chloroprene rubber have only limited resistance to water.

Nitrile Rubber (NBR)
Rubber buffers made of nitrile rubber have the advantage of high tear resistance and abrasion resistance. In addition, rubber buffers made of nitrile rubber have good resistance to hydrocarbons, fats and oils. As a result, this material is often used for seals because it also has good temperature resistance. Furthermore, vibration dampers made of nitrile rubber are electrically conductive.

Silicone and Silicone Gel (SI)
Rubber, silicone metal bearings are very temperature-resistant, water-resistant and durable in response to the other materials. Vibration dampers made of silicone rubber also have very good chemical resistance. Silicone is a soft material that has very good damping properties, but can absorb only a small amount of supporting force.
Further information on the hardness of the various rubbers can be found under Rubber Properties as a PDF.

Application Examples - Rubber-Metal Elements

Application example - rubber metal buffer with [Aug] plate and internal threads - vibration dampers on base plates

Application example: vibration damper internal thread and eye plate
(1) Screw , (2) mounting plate , (3) screw

Application example - rubber metal buffer with [Aug] plate and external thread - vibration damper on base plates

Application example: vibration damper external thread and eye plate
(1) Nut , (2) mounting plate , (3) screw

Application example - rubber metal buffer with external thread and internal thread

Application example: threaded vibration absorber
(1) Screw , (2) mounting plate , (3) base plate (meviy), (4) nut

Application example - rubber metal buffer with two-sided internal thread

Application example: vibration absorber with external thread
(1) Nut , (2) mounting plate , (3) base plate (meviy)

Industrial Applications

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Pharmaceutical industry

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Part Number
EBGONP40250

Part Number	Standard Unit Price	Minimum order quantity	Volume Discount	Standard Shipping Days ?	RoHS	Maximum Operating Load (N)	Properties	Connection Type	Connecting Screw M	Height H (mm)	Spring Constant (N/mm)	Material	Operating Temperature Range (°C)	Applied Load (N)	O.D. D (Ø)
	17.39 €	1	Available	Same day Stock	10	700	Durability / Weather Resistance / Water Resistance / Oil Resistance / Ozone Resistance	Tappeds, Plate Stopper Type	8	25	340	[Chloroprene] Chloroprene Rubber	-20～70	363～700	40

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Technical Drawing - Rubber-Metal Elements

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Specification Tables - Rubber-Metal Elements

Part Number		D₁	D₂	H₁	H₂	t	ℓ ₁	S	M (Coarse Thread)	ℓ ₂	W₁xW₂	h	P	Allowable Load N {kgf}	Standard Load N {kgf}	Spring Constant N/mm {kgf/cm}	X Direction Allowable Load N {kgf}	Rigidity Ratio kx/kz
Type	No.
Tapped and Threaded Studs DBGONA EBGONA Tapped Stud, Plate Mount DBGONP EBGONP	12160	12	10	16	12.0	2.0	13	11	5	4.5	-	-	-	110 {11}	30~78 {3~8}	62 {63}	25 {2.5}	0.2
	15150	15	12	15	11.0		16	12						160 {16}	59~130 {6~13}	110 {110}	34 {3.5}	0.24
	20150	20	15					13	6	5	49x20	6.5x8.5 Slotted Hole	36	280 {29}	98~160 {10~16}	180 {180}	69 {7}	0.18
	20200			20	16.0									180 {18}	59~98 {6~10}	88 {90}	49 {5}	0.22
	25180	25	20	18	13.4	2.3	20	16		6	56x25		42	580 {59}	147~280 {15~29}	220 {220}	98 {10}	0.19
	30180	30	25	18	13.4		23	20	8	7.2	62x30		48	1700 {170}	415~830 {43~85}	610 {620}	250 {25}	0.16
	40250	40	34	25	20.4		33	25			76x40	9x11 Slotted Hole	60	1420 {145}	363~700 {37~71}	340 {350}	340 {35}	0.23

Selection Methods, Mounting Methods, Properties, Cautions >> P.460

More Information - Rubber-Metal Elements

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Basic information

Type	Antivibration Rubbers	Application	Vibration Control	Hardness(Shore A)	60
Antivibration Rubber Type	Round Type	Body Color	Black

This page is Rubber-metal elements / cylindrical, stepped / internal thread, external thread / eye plate, stainless steel / CR, NBR conductive / A60, part number EBGONP40250.
You can find the detail information about specifications and dimensions on part number EBGONP40250.

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Basic Attributes

Properties
- Durability
- Weather Resistance
- Water Resistance
- Oil Resistance
- Ozone Resistance
- Electrical Conductivity
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Type
- DBGONA
- DBGONP
- EBGONA
- EBGONP
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Maximum Operating Load(N)
78

98

130

160

280

700

830
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Connection Type
- Tappeds, Threaded Stopper Type
- Tappeds, Plate Stopper Type
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Connecting Screw M
- 5
- 6
- 8
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Height H(mm)
15

16

18

20

25
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Spring Constant(N/mm)
62

88

110

180

220

340

610
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Material
- Chloroprene
  - Chloroprene Rubber
- Nitrile Rubber
  - Conductive Nitrile Rubber
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O.D. D(Ø)
- 12
- 15
- 20
- 25
- 30
- 40
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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:
Can the rubber buffers be subjected to tension?: Answer:
Rubber buffer or rubber metal elements should not be subjected to pull. In this case, the vulcanized holding plate may be separated from the damping material. Therefore, vibration dampers should only be used in designs that subject it to pressure. This ensures that the vibration damper does not suffer a fatigue fracture.
Question:
Do you have oil-resistant rubber buffers?: Answer:
In an environment with oil-containing substances, a rubber metal buffer made of nitrile rubber (NBR) can be used. Since this material is oil-resistant, it is quite often used for seals. Other materials can swell up in contact with greases or oils, which will cause the rubber buffer to fail and cause it to lose its damping properties.
Question:
Which rubber buffer can be used in water vapour?: Answer:
A rubber metal buffer made of silicone rubber or silicone gel can be used here. It is highly resistant to water and offers very good damping properties. Similar to sanitary systems, this material is very resistant to aging, chemicals and temperature.
Question:
What is the permissible operating temperature of rubber metal silicone buffers?: Answer:
The maximum temperature resistance of silicone rubber buffers is at approx. 200°C. It is recommended to check the temperature resistance of the respective product. This can be found under the More Information tab.

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Variation of this product

Part Number
DBGONA12160
DBGONA15150
DBGONA20150
DBGONA20200
DBGONA25180
DBGONA30180

Standard Unit Price	Minimum order quantity	Volume Discount	Standard Shipping Days ?	RoHS	Maximum Operating Load (N)	Properties	Connection Type	Connecting Screw M	Height H (mm)	Spring Constant (N/mm)	Material	Operating Temperature Range (°C)	Applied Load (N)	O.D. D (Ø)
9.70 €	1	Available	Same day Stock	-	78	Electrical Conductivity	Tappeds, Threaded Stopper Type	5	16	62	[Nitrile Rubber] Conductive Nitrile Rubber	-	30～78	12
9.83 €	1	Available	Same day Stock	-	130	Electrical Conductivity	Tappeds, Threaded Stopper Type	5	15	110	[Nitrile Rubber] Conductive Nitrile Rubber	-	59～130	15
10.07 €	1	Available	Same day Stock	-	160	Electrical Conductivity	Tappeds, Threaded Stopper Type	6	15	180	[Nitrile Rubber] Conductive Nitrile Rubber	-	98～160	20
10.45 €	1	Available	Same day Stock	-	98	Electrical Conductivity	Tappeds, Threaded Stopper Type	6	20	88	[Nitrile Rubber] Conductive Nitrile Rubber	-	59～98	20
11.46 €	1	Available	5 Days	-	280	Electrical Conductivity	Tappeds, Threaded Stopper Type	6	18	220	[Nitrile Rubber] Conductive Nitrile Rubber	-	147～280	25
12.46 €	1	Available	5 Days	-	830	Electrical Conductivity	Tappeds, Threaded Stopper Type	8	18	610	[Nitrile Rubber] Conductive Nitrile Rubber	-	415～830	30