rubber buffer waist / outer thread

description	article number	D(mm)	H(mm)	d x I(mm)	ta	shorehardness+/-5
type AT 10x10	5652	10	10	M4x10	8	57
type AT 10x10	5822	10	10	M4x13	8	57
type AT 15x15	5823	15	15	M4x13	12	57
type AT 20x15	5503	20	15	M6x18	14	57
type AT 20x30	5824	20	30	M6x18	12	57
type AT 25x20	5825	25	20	M6x15	18	57
type AT 25x22	5826	25	22	M8x14	18	57
type AT 30x20	5519	30	20	M8x23	25	57
type AT 30x25	5827	30	25	M8x20	18	57
type AT 40x30	5830	40	30	M8x20	25	57
type AT 40x40	5828	40	40	M10x20	24	57
type AT 40x48	5529	40	48	M8x23	30	57
type AT 40x50	5829	40	50	M8x23	20	57
type AT 50x30	5427	50	30	M10x33	42	57
type AT 60x60	5831	60	60	M10x20	45	57
type AT 60x60	5832	60	60	M10x28	45	57
type AT 75x40	5429	75	40	M12x37	55	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 waist-shaped 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.