The original design comprises a bullet shaped end but numerous alternatives are now available based on single ended versions of other mount types. The plate mounted SP styles e.g. 8050NTP are suited to high shock forces and can be produced in various natural rubber materials. The bobbin mount based versions eg 3225/OEO are also available in various materials. For more information on these variants go to SP Mount or Bobbin Mount These mounts may also be used, if appropriate to loading, as mounting feet.
Bullet shaped bump stops Bullet Shaped Bump Stops. By virtue of its shape, this classic design provides a progressive resistance to compression providing maximum shock protection.
Model
Dia.
Length
Thread
Thread Length
Hardness ShA
BS-2525
25
25
M6
20
55
BS-4030
40
30
M8
25
55
BS-5040
50
40
M10
30
55
BS-5067
50
67
M8
24
55
BS-6050
60
50
M12
40
55
BS-7676
76
76
M12
40
55
BS-10080
96
96
M16
47
55
BS-125100
125
100
M16
45
50
4854*
48
54
M10
25
35,40,50,60,70
All the above are Zinc plated except * which is Sherardized
Plate mounted bump stops (flat ended buffers) These bump stops are derivatives of our standard SP mounts and are available in 3 sizes and, where required different rubber grades. The standard grades are indicated below.
Model
Base Dia.
Height
Dia or width
Max centres
Min Centres
Hardness ShA
8050NTP *
80
50
12.2
106
100
35,40,50,60,70
10080NTP
100
80
17
150
140
15080NTP
150
80
20
200
200
Metal parts are painted with ‘chassis black’ protective finish except * which has a Sherardized plate
Bobbin style bump stops
Bobbin style
Dia
Length
Thread length
Thread
1111
11
11
10
M4
1515
15
15
13
M5
1616
16
16
13
M6
2022
20
22
16
M6
2216
22
16
16
M6
2620
26
20
20
M8
3225
32
25
20
M8
3540
35
40
25
M10
5535
55
35
25
M10
7535
75
35
37
M12
8050
80
50
37
M12
These parts are available in all normal rubber hardness grades (35, 40, 50, 60, 70 ShA) and various materials. All metal studs are Sherardized for maximum corrosion protection.
Installation Bump stops are typically mounted such that the direction of shock is coincident with the mount axis. However a combination of pure compression and shear loads will also be accommodated. This is typically fixed to the equipment being isolated. If being used for shock protection of structures, the mount may be fixed to the structure to minimise collision damage for example.
Typical Applications Sliding door stops, cabinet door stops, closure stops, vehicle bonnet/boot stops, limit stop for oscillating machinery, feet for sensitive equipment, buffer for vehicle collision protection, overtravel protection.
Materials Rubber: Natural rubber (polyisoprene) of different grades. Alternative elastomers available on request. Metal: Zinc plated (Sherardized on 4854 model) or painted steel and zinc plated & passivated nuts & lock washers where provided.
