rubber-metal bearings type C

description	article number	d(mm)	h(mm)	g	t(mm)	shorehardness+/-5
type C 8x8	5498	8	8	M3	3	57
type C 10x10	5184	10	10	M4	4	57
type C 15x10	5187	15	10	M4	4	57
type C 15x15	5189	15	15	M4	5	57
type C 15x20	5192	15	20	M4	5	57
type C 20x15	5195	20	15	M6	5	57
type C 20x20	5198	20	20	M6	5	57
type C 20x25	5201	20	25	M6	5	57
type C 20x30	5484	20	30	M5	5	57
type C 20x30	5572	20	30	M6	5	57
type C 25x15	5203	25	15	M6	5	57
type C 25x20	5209	25	20	M6	5	57
type C 25x25	5554	25	25	M6	5	57
type C 30x15	5215	30	15	M8	7	57
type C 30x20	5217	30	20	M8	7	57
type C 30x30	5220	30	30	M8	7	57
type C 40x30	5224	40	30	M8	7	57
type C 40x40	5227	40	40	M8	7	57
type C 50x20	5229	50	20	M8	7	57
type C 50x30	5231	50	30	M10	8	57
type C 50x40	5234	50	40	M10	8	57
type C 50x45	5237	50	45	M10	8	57
type C 50x50	5240	50	50	M10	8	57
type C 70x45	5243	70	45	M10	8	57
type C 75x30	5245	75	30	M12	10	57
type C 75x40	5247	75	40	M12	10	57
type C 75x50	5250	75	50	M12	10	57
type C 75x55	5253	75	55	M12	10	57
type C 100x40	5256	100	40	M16	14	57
type C 100x55	5259	100	55	M16	14	57
type C 100x60	5262	100	60	M16	14	57
type C 100x75	5265	100	75	M16	14	57
type C 125x55	5268	125	55	M16	14	57
type C 125x75	5271	125	75	M16	14	57
type C 150x60	5278	150	60	M16	14	57
type C 150x75	5278	150	75	M16	14	57
type C 200x100	5280	200	100	M16	18	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 inner 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.