LAMECO Group

Noise Abatement Laminated Shims

Laminated shims in SILENTLINE®

SILENTLINE® laminated shim

Any mechanical assembly in working order generates vibrations that are source of harmful frequencies. As a solution to this critical drawback, LAMECO 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.

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

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