rubber-metal bearings type A

description	article number	d(mm)	h(mm)	g x l(mm)	shorehardness+/-5
type A 4x6	5001	4	6	M2x6	57
type A 6x7	5004	6	7	M3x6	57
type A 8x8	5007	8	8	M3x6	57
type A 10x10	5010	10	10	M4x10	57
type A 15x8	5014	15	8	M4x10	57
type A 15x15	5018	15	15	M4x13	57
type A 15x20	5020	15	20	M4x13	57
type A 18x18,5	5023	18	8,5	M6x16	57
type A 20x15	5026	20	15	M6x15	57
type A 20x20	5029	20	20	M6x15	57
type A 20x25	5032	20	25	M6x15	57
type A 25x10	5034	25	10	M6x18	57
type A 25x15	5037	25	15	M6x18	57
type A 25x20	5039	25	20	M6x18	57
type A 25x30	5042	25	30	M6x18	57
type A 30x15	5045	30	15	M8x20	57
type A 30x20	5048	30	20	M8x20	57
type A 30x30	5051	30	30	M8x20	57
type A 40x30	5054	40	30	M8x23	57
type A 40x40	5057	40	40	M8x23	57
type A 50x20	5060	50	20	M10x28	57
type A 50x30	5063	50	30	M10x28	57
type A 50x40	5066	40	60	M10x28	57
type A 50x45	5069	50	45	M10x28	57
type A 50x50	5072	50	50	M10x28	57
type A 70x45	5074	70	45	M10x30	57
type A 75x25	5076	75	25	M12x37	57
type A 75x40	5079	75	40	M12x37	57
type A 75x50	5082	75	50	M12x37	57
type A 75x55	5085	75	55	M12x37	57
type A 100x55	5090	100	55	M16x41	57
type A 100x60	5093	100	60	M16x36	57
type A 100x75	5094	100	75	M16x45	57
type A 125x55	5095	125	55	M16x46	57
type A 125x75	5099	125	75	M16x45	57
type A 150x60	5100	150	60	M16x41	57
type A 150x75	5101	150	75	M16x46	57

exemplary table in 57 shore with zinc-galvanized metal components - data on pressure- and thrust strain on request

schematic drawing of a rubber-metal bearing with outer threads on both sides and in between a cylindrical elastomer corpus

generic data on storage time and duration of operation of elastomers and rubber-metal components

the prescribed storage time of our products is in accordance to DIN 95360:

storage time
from initial delivery				max. 10 quarter years (storage prior to installation)
from initial installation				max. 20 quarter years (storage prior to installation)

as maximum storage time, we adhere to the guidelines of ISO 2230:

group classification	initial storage time	extended storage time (after checking the elements)
group A material (NR, SBR,BR,…)	5 years	2 years
group B material (NBR, CR, IIR,…)	7 years	3 years
group C material (EPDM, silicones,…)	10 years	5 years
To be noted: a deviation from the storage temperature of 25° C results in altered storage times - a storage temperature of +10 ° C ( from 25° C ) reduces the storage time by 50%, a storage temperature of -10 ° C ( from 25° C ) extends the storage time by 50%

the duration of operation - in accordance to DIN 95360 - is specified as below:

duration of operation
operating temperature [ °C ]				allowed duration of operation in years with up to 3000 operating hours ⁴
-30 to 55				10
-30 to 80				5
⁴ with excess of 3000 operating hours per year and/or the influence of aggressive media such as e.g. ozone, oil mist, salt water or salt-containing air, the possible duration of operation may reduce significantly

In general, if applied within the allowed load range and owing to the natural ageing process of rubber, a recommended duration of operation of max. 6 years must be assumed. Latest after this period, an inspection and assessment of a representative number of components should be executed.

Rubber-metal components and form-based rubber parts are maintenance-free during the operational period.

Replacement is due, if:
- by means of setting and creeping towards the direction of pressure only 70% of the initial rubber thickness is achieved
- by means of the influence of weathering several clearly visible cracks per cm² rubber surface have formed
- the items have swelled significantly under exposure of non-permissible oil wetting
- a loss of the rubber-metal adhesion has occured ( e.g. due to corrosion of the metal components )
- mechanical damage can be observed, which can lead to a further destruction of the product due to the notch sensitivity of the caoutchouc

The above information is provided in all conscience and to the best of knowledge, however, the former recommendation can only serve as a theoretical guideline, and does not absolve the user from the neccessity of own assessments and test procedures. bwz® Schwingungstechnik GmbH expressedly excludes any and all liability for damages or disadvantages whatsoever, even in regard to third party protective rights.