Noise Abatement Laminated Shims: SILENTLINE®

‣ Metallic Laminated Shims ‣ Noise Abatement Laminated Shims

Any mechanical assembly in working order generates vibrations that are source of harmful frequencies. As a solution to this critical drawback, LAMÉCO offers an innovative laminated product called SILENTLINE®.
SILENTLINE® is a composite of metal and synthetic material, which has the key advantage of spreading the vibrational energy over a dramatically wider band (lower Q factor) - therefore dampening the transmission of potentially destructive harmful frequencies.
Advantages Performances Thicknesses Conclusion

Letter - Inch A4 - Metric Motion System Design article

Benefits of SILENTLINE® laminated shims

Improved mechanical characteristics

The mechanical characteristics of laminated shims are improved with this material. CETIM tested two probes, both in 0.08 inch / 2 mm thickness:

The first one, of conventional form, entirely consisting of peelable metal foils: achieved Vickers value = 440 MPA.
The second one manufactured in the new material: achieved Vickers value = 510 MPA.

Reduced wear and tear

SILENTLINE® laminated shims which thus require less maintenance being less subject to wear.

Competitive price

The cost of SILENTLINE® laminated shims is virtually equivalent to that of shims made of other laminated Materials. So there is no economic obstacle to their use.

Green product

Other asset of this product and reasons why it was designed:

It contributes to improvements of the working environment, of benefit to all users.
It makes it easier to achieve the demands of noise abatement legislation.

Performances of SILENTLINE® laminated shims

Tests carried out by CETIM on this new materiel show its capacity to tone down − in a spectacular way − the two consequences of a harmful frequency emission:

Absorption or dampening and dispersion of 45 to 50 % of the amplitude;
Reduction by 50 to 55 % of the emission duration.

This is therefore a high performance material.

Test results diagram on SILENTLINE® shims

Available thicknesses for laminated shims in SILENTLINE®

Standard / Materials						Thicknesses of laminations in mm / inches Standard
Standard / Materials						0,01 .0004	0,025 .001	0,05 .002	0,075 .003	0,1 .004
STD	AISI SAE	UNS	EN	BS	ISO	2	6	7	8	9
Stainless Steel
SLS4	302	304S31	1.4300	S30200				√	√	√
SLS5	304	S30400	1.4301 1.4350	304S15 304S16		√	√	√	√	√
SLS6	304L	S30403	1.4306	304S11				√	√	√
SLS7	316	S31600	1.4401 1.4036	316S16 316S33			√	√	√
SLS8	316L	S31603	1.4404 1.4435	316S12 316S13				√	√	√
Steel
SLS9	1010	G10100	1.1121	040A10	1010		√	√	√	√

As a conclusion

SILENTLINE® shims can be substituted for any other wedging process:

They do not have any cost or use inconvenience
They offer several additional services (notably silence and life duration) which are of paramount importance today.

For more information: .

SILENTLINE®: Trademark Registered, Europe: Patent No. EP 0 667 233 B1

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