Bearer Springs (Hourglass)
Features
Designed and developed to provide an idealised interface between rail vehicle bodies and bogies,‘Hourglass’ Bearer Springs allow all the relative displacements required by secondary suspensions, but with all the advantages of rubber springing, i.e. simplicity,reduced maintenance costs, improved ride characteristics and long service life.
Metalastik® ‘Hourglass’ Bearer Springs offer rail vehicle designers the solution of a high load capacity spring which exhibits excellent all round flexibility (vertical frequencies of 1.8 – 2.5 Hz). The spring has a progressive load/displacement characteristic which achieves quasi-constant periodicity and at the same time minimises vehicle body height change, tare to laden.
Further ranges of springs, i.e. Hourglass and Half-Hourglass Bearer Springs with unique performance characteristics are also detailed in this publication.
Application
Metalastik® ‘Hourglass’ Bearer Springs are in successful operation worldwide in a diversity of service applications including suspensions for LRV, metro, freight wagon and locomotives.
Bearer Springs(Hourglass)
 
42 - 100 mm  Shear Deflection
 
 Product No
 
17-2252
17-1653
17-1980
17-2173
17-1863
 Vertical Load Pz
kN
43
63
130
38
56
 Vertical Deflection dz
mm
52
105
100
119
119
 Horizontal Deflection dx
mm
42
95
95
100
100
 Dimension A
mm
240
432
400
320
320
                      B
mm
240
370
370
320
320
                      C
mm
154
384
368
312
311
 Unit mass
kg
8.6
46
46
19
19
Bearer Springs(Hourglass)
 
100 - 120 mm  Shear Deflection
 
 Product No
 
17-1869
17-2171
17-1946
17-1658
 Vertical Load Pz
kN
90
75
200
250
 Vertical Deflection dz
mm
118
142
164
128
 Horizontal Deflection dx
mm
100
120
120
120
 Dimension A
mm
362
432
470
570
                      B
mm
340
384
470
570
                      C
mm
332
376
460
370
 Unit mass
kg
22
42
42.6
92

Bearer Springs(Half-Hourglass)
 
20 - 60 mm  Shear Deflection
 
 Product No
 
17-2134
17-1948
12-1822
17-1818
17-1950
 Vertical Load Pz
kN
43
75
99
100
200
 Vertical Deflection dz
mm
26
71
50
72
82
 Horizontal Deflection dx
mm
20
40
40
55
60
 Dimension A
mm
240
370
284
370
495
 A1
mm
240
432
360
420
470
 B
mm
240
384
330
420
470
 C
mm
77
188
182
192
230
 Unit mass
kg
4.3
19.2
12
20.4
43