Vibration Mounts Products: Farrat Rubber Metal Isolators

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Anti Vibration Mounts - Rubber Metal Isolators

Below you will find information on specific products within our range. To ensure that you purchase the correct products to suit your requirements we recommend that, you contact one of our qualified customer focused advisors, who will be only too pleased to help. Please call 08451 306 269 or email us for a quote or advice.

Rubber Metal Isolators

These versatile rubber-to-metal bonded vibration and shock isolators are available in a broad range and variety of fixing configurations.

Farrat RUBBER METAL ISOLATORS RM are used widely for the reduction of transmitted vibration, shock and noise generated by such machinery as Compressors, Power Generating Sets, Motors Pumps and Mechanical Handling Plant and the Isolation of vibration sensitive equipment such as electronic and electrical equipment.


Load in Compression	Load in Compression	Arrangement for optimum effect	DO NOT Load in Tension

The RM Isolators are manufactured in two alternative elastomeric materials.

Natural Rubber NR for maximum resilience and isolation performance.

Nitrile Rubber NBR having excellent oil & chemical resistance with increased damping properties but with a higher dynamic stiffness.

The RM ISOLATORS are designated by:

Size Diameter D & Height H
Form A,B,C D or E
Rubber Type NR or NBR
Shore Hardness 43, 57 or 68
Fixing M x L or Mi

Although stock items are generally available in rubber Shore Hardness 43 for Forms A, B & C, other Forms and Hardnesses can be supplied subject to special order.

For stock items of Forms D & E refer to the current Farrat Price List, or alternatively discuss your requirements with our Technical Sales Department.

Selection can be made by refering to the table which gives the Maximum Load (n), the Spring Rate K (N/mm) and the Static Deflection mm for Forms A, B & C when the static load is applied to deflect the rubber in Compression or Shear.

Care should be taken with the application of the RM ISOLATORS to ensure that they are not subjected to tensile loads.

If the distribution of load on a group of isolators is not uniform then it may be necessary to make a selection of different sizes.

Form A

Form B

Form C

Form D

Form E

ISOLATOR RM						Load applied in Compression							Load applied in Shear
ISOLATOR RM							Form A		Form B		Form C			Form A		Form B		Form C
Type		Fixing			Shore Hardness	Max Load N	K N/mm	Defl mm	K N/mm	Defl mm	K N/mm	Defl mm	Max Load N	K N/mm	Defl N/mm	K N/mm	Defl. mm	K N/mm	Defl. mm
D	H	M	L	Mi	Shore Hardness	Max Load N	K N/mm	Defl mm	K N/mm	Defl mm	K N/mm	Defl mm	Max Load N	K N/mm	Defl N/mm	K N/mm	Defl. mm	K N/mm	Defl. mm
10	10	4	10	4	43	20	26	0.8	31	0.7	34	0.6	9	5	1.9	6	1.6	6	1.5
					57	40	59	0.7	71	0.6	77	0.6	17	9	1.9	11	1.6	12	1.5
					68	65	101	0.6	121	0.6	131	0.5	23	14	1.6	17	1.3	19	1.2
15	15	4	13	4	43	40	33	1.2	40	1.3	43	0.9	20	6	3.2	9	2.7	8	2.5
					57	90	78	1.2	94	1.3	101	0.9	37	12	3.1	14	2.6	16	2.4
					68	150	135	1.1	162	1.3	176	0.9	53	19	2.8	23	2.3	25	2.2
20	20	6	15	6	43	80	48	1.7	58	1.3	62	1.3	37	9	4	11	3.3	12	3.1
					57	170	111	1.5	133	1.3	144	1.2	68	17	4	20	3.3	22	3.1
					68	260	189	1.4	227	1.3	246	1.1	95	27	3.5	33	2.9	35	2.7
20	25	6	18	6	43	70	34	2.1	41	1.8	44	1.6	30	6	5.2	7	4.3	8	4.0
					57	160	80	2.0	96	1.7	104	1.5	55	11	5.2	13	4.3	14	4.0
					68	240	137	1.8	164	1.5	178	1.3	90	17	5.2	21	4.3	23	4.0
25	30	61	8	6	43	110	43	3.2	41	1.4	56	2	47	7	6.5	9	5.4	9	5
					57	250	101	3.1	96	1.4	131	1.9	87	13	6.5	16	5.4	17	5
					68	380	173	2.8	164	1.2	225	1.7	140	22	6.5	26	5.4	28	5
30	30	8	20	8	43	170	64	4	52	2.3	83	2	80	12	6.5	15	5.4	16	5
					57	370	151	3.7	121	2.2	196	1.9	148	23	6.5	27	5.4	30	5
					68	570	257	3.3	208	1.9	334	1.7	210	37	5.7	44	4.8	48	4.4
40	30	8	23	8	43	340	128	5.3	77	2.3	166	2	157	24	6.5	29	5.4	31	5
					57	700	290	4.6	181	2.2	377	1.9	288	44	6.5	53	5.4	58	5
					68	1100	493	4.3	308	1.9	641	1.7	380	73	5.2	88	4.3	95	4
50	45	10	28	10	43	480	123	3.8	154	3.4	160	3.0	230	23	9.8	28	8.2	31	7.5
					57	1000	284	3.4	348	3.2	369	2.7	430	44	9.7	53	8.1	58	7.5
					68	1600	486	3.2	592	2.8	632	2.5	590	71	8.3	85	6.9	92	6.4
75	55	12	37	12	43	1200	238	5.5	148	4.4	309	3.9	550	45	12.2	54	10.2	59	9.4
					57	2500	540	5.0	341	4.2	702	3.6	1000	83	12.1	99	10.1	107	9.3
					68	3900	918	4.5	583	3.7	1193	3.3	1320	135	9.8	162	8.2	175	7.5
100	55	16	45	16	43	2500	533	4.7	640	4.2	693	3.6	1000	85	11.7	103	9.8	111	9.0
					57	5000	1157	4.3	1388	4	1504	3.3	1880	161	11.7	193	9.8	209	9.0
					68	7800	1950	4.0	2340	3.5	2535	3.1	2360	259	9.1	311	7.6	337	7.0
150	55	16	45	16	43	8000	1895	4.2	2274	3.8	2464	3.2	2380	213	11.2	255	9.3	276	8.6
					57	16000	3870	4.1	4644	3.6	5031	3.2	4400	393	11.2	471	9.3	511	8.6
					68	22000	6275	3.5	7530	3.2	8158	2.7	5300	631	8.4	757	7.0	820	6.5

Dimensions in mm

Order examples:
Diameter 20 Height 20, M6x1.5 Male both ends, NBR, 43 Shore hardness D20 H20 A NBR43 M6

Diameter 40 Height 30, M8 Female both ends, NBR, 43 Shore hardness D40 H30 C NBR43 M8

Anti Vibration Products: Rubber Metal Isolators

Anti Vibration Mounts - Rubber Metal Isolators