Rubber-metal elements / cylindrical, stepped / external thread on both sides / eye plate, steel, stainless steel / NR, CR, / A45, A60 (BGOMAC40250)

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MISUMI

Product Details:

Manufacturer part number: BGOMAC40250

Brand: MISUMI

Price: 8.06 €

Delivery time: 5 Days

Technical Data:

Maximum Operating Load: 930 N

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

Connection Type: Both Ends Threaded Studs

Connecting Screw M: -

Height H: 25 mm

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BGOMAC40250

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Back to the Category Antivibration Materials

Technical Drawing - Rubber-Metal Elements

Antivibration Rubber Mounts/Both Ends Threaded: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

■Both Ends Threaded Studs

Type	Material		Hardness	Accessory
	Main Body	Metal Fitting
BGOMA	Natural Rubber	Steel (Trivalent Chromate)	Shore A60	Nut, Spring Washer 2 pcs. each
BGOMAC	Chloroprene Rubber
BGOMAS	Natural Rubber	EN 1.4301 Equiv.
BGOMAL		Steel (Trivalent Chromate)	Shore A45

■Threaded Stud, Plate Mount

Type	Material		Hardness	Accessory
	Main Body	Metal Fitting
BGOMP	Natural Rubber	Steel (Trivalent Chromate)	Shore A60	Nut, Spring Washer 1 pc. each
BGOMPC	Chloroprene Rubber
BGOMPL	Natural Rubber		Shore A45

Further specifications can be found under the tab More information.

Composition of a Product Code - Rubber-Metal Elements

Part Number

BGOMA15150

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

3D printer industry

Automotive industry

Pharmaceutical industry

Packaging industry

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Data to be displayed: 30; 45; 60

Part Number
BGOMAC40250

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)	Hardness (Shore A)	Material	Operating Temperature Range (°C)	Applied Load (N)	O.D. D (Ø)
	8.06 €	1	Available	5 Days	10	930	Durability / Weather Resistance / Water Resistance / Oil Resistance / Ozone Resistance	Both Ends Threaded Studs	-	25	340	60	[Chloroprene] Chloroprene Rubber	-20～70	363～930	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	S	M (Coarse)	W₁xW₂	h	P	Unit Price
Type	No.												BGOMA	BGOMAC	BGOMAS	BGOMP	BGOMPC	BGOMAL	BGOMPL
(Shore A60) Both Ends Threaded Studs BGOMA BGOMAC BGOMAS Threaded Stud, Plate Mount BGOMP BGOMPC (Shore A45) Both Ends Threaded Studs BGOMAL Threaded Stud, Plate Mount BGOMPL	12160	12	10	16	12.0	2.0	12	11	5	-	-	-				-	-		-
	15150	15	12	15	11.0		15	12
	20150	20	15					13	6	49x20	7	36
	20200			20	16.0
	25180	25	20	18	13.4	2.3	18	16		56x25		42
	25270			27	22.4
	30180	30	25	18	13.4		24	20	8	62x30		48
	30260			26	21.4
	35260	35	30							69x35	9	53
	40250	40	34	25	20.4		30	25		76x40		60

No.	Shore A60 BGOMA BGOMAC BGOMAS BGOMP BGOMPC									Shore A45 BGOMAL BGOMPL
	Z Direction						X Direction Allowable Load N {kgf}		Rigidity Ratio kx/kz	Z Direction					X Direction Allowable Load N {kgf}		Rigidity Ratio kx/kz
	Allowable Load N {kgf}		Standard Load N {kgf}		Spring Constant N/mm {kgf/cm}		X Direction Allowable Load N {kgf}		Rigidity Ratio kx/kz	Allowable Load N {kgf}		Standard Load N {kgf}		Spring Constant N/mm {kgf/cm}	X Direction Allowable Load N {kgf}		Rigidity Ratio kx/kz
12160	110	{11}	30~78	{3~8}	41	{42}	25	{2.5}	0.20	66	{7}	18~47	{1.8~5}	25 {25}	15	{1.5}	0.20
15150	160	{16}	59~130	{6~13}	74	{75}	34	{3.5}	0.20	96	{10}	35~78	{3.5~8}	44 {45}	20	{2.1}	0.20
20150	280	{29}	98~160	{10~16}	130	{130}	69	{7}	0.15	170	{17}	59~96	{6~10}	78 {78}	41	{4.2}	0.15
20200	180	{18}	59~98	{6~10}	78	{80}	49	{5}	0.19	110	{11}	35~59	{3.5~6}	47 {48}	29	{3}	0.19
25180	490	{50}	128~250	{13~25}	200	{200}	98	{10}	0.16	290	{30}	76~150	{7.7~15}	120 {120}	59	{6}	0.16
25270	310	{32}	88~160	{9~16}	93	{95}	59	{6}	0.20	190	{19}	53~96	{5.4~10}	56 {57}	35	{3.6}	0.20
30180	890	{91}	226~450	{23~46}	310	{320}	170	{17}	0.16	530	{55}	138~270	{14~28}	190 {192}	100	{10}	0.16
30260	610	{62}	147~300	{15~31}	140	{145}	120	{12}	0.19	370	{37}	93~180	{9.5~19}	84 {87}	72	{7.2}	0.19
35260	980	{100}	245~490	{25~50}	240	{240}	250	{25}	0.17	590	{60}	147~290	{15~30}	140 {144}	150	{15}	0.17
40250	1810	{185}	363~930	{37~95}	340	{350}	360	{37}	0.17	1090	{111}	218~560	{22~57}	200 {210}	220	{22}	0.17

Spring constant in X direction is calculated by (Spring Constant in Z Direction x Rigidity Ratio).
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	Antivibration Rubber Type	Round Type
Body Color	Black

This page is Rubber-metal elements / cylindrical, stepped / external thread on both sides / eye plate, steel, stainless steel / NR, CR, / A45, A60, part number BGOMAC40250.
You can find the detail information about specifications and dimensions on part number BGOMAC40250.

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Basic Attributes

Properties
- Durability
- Weather Resistance
- Water Resistance
- Oil Resistance
- Ozone Resistance
Clear
Connecting Screw M
- 5
- 6
Clear
Type
- BGOMA
- BGOMAC
- BGOMAL
- BGOMAS
- BGOMP
- BGOMPC
- BGOMPL
Clear
Maximum Operating Load(N)
47

59

76

78

94

98

130

150

160

183

250

270

290

300

450

490

560

930
Clear
Connection Type
- Both Ends Threaded Studs
- Threadeds, Plate Stopper Type
Clear
Height H(mm)
15

16

18

20

25

26

27
Clear
Spring Constant(N/mm)
25

41

44

47

56

74

76

78

86

93

120

130

140

190

200

210

240

310

340
Clear
Hardness(Shore A)
45

60
Clear
Material
- Natural Rubber
- Chloroprene
  - Chloroprene Rubber
Clear
O.D. D(Ø)
- 12
- 15
- 20
- 25
- 30
- 35
- 40
Clear
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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
BGOMA20200
BGOMA25180
BGOMA25270
BGOMAL12160
BGOMAL15150
BGOMAL20150

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)	Hardness (Shore A)	Material	Operating Temperature Range (°C)	Applied Load (N)	O.D. D (Ø)
4.16 €	1	Available	5 Days	10	98	Water Resistance / Weather Resistance	Both Ends Threaded Studs	6	20	78	60	Natural Rubber	-30～60	59～98	20
4.27 €	1	Available	Same day Stock	10	250	Water Resistance / Weather Resistance	Both Ends Threaded Studs	6	18	200	60	Natural Rubber	-30～60	128～250	25
4.78 €	1	Available	5 Days	10	160	Water Resistance / Weather Resistance	Both Ends Threaded Studs	6	27	93	60	Natural Rubber	-30～60	88～160	25
3.02 €	1	Available	Same day Stock	10	47	Water Resistance / Weather Resistance	Both Ends Threaded Studs	5	16	25	45	Natural Rubber	-30～60	18～47	12
3.40 €	1	Available	5 Days	10	76	Water Resistance / Weather Resistance	Both Ends Threaded Studs	5	15	44	45	Natural Rubber	-30～60	35～76	15
4.41 €	1	Available	5 Days	10	94	Water Resistance / Weather Resistance	Both Ends Threaded Studs	6	15	76	45	Natural Rubber	-30～60	59～94	20