Plain & Spherical Plain Bearings · ISO 3547-1 / DIN 1494
Bearing Bronze CuSn8 Wrapped Bronze Bushings
Permissible contact pressure and pv limit, temperature range, lubrication, and the full size range.
Bearing Bronze CuSn8 Wrapped Bronze Bushings are made from tin bronze (CuSn12 and related grades, ISO 4382-1) and sintered oil-impregnated bronze (ISO 5755). Corrosion behavior: good in water and general industrial atmospheres; attacked by ammonia and by strong acids. The material is non-magnetic, and the usable service range is solid bronze to about +200 °C; a sintered oil-impregnated bush is limited by its oil, roughly -20 °C to +100 °C. In practice this material is a sliding material: it is rated by a pv limit rather than by a basic dynamic load rating, and it tolerates edge loading, shock and contamination far better than a rolling bearing does.
Material
tin bronze (CuSn12 and related grades, ISO 4382-1) and sintered oil-impregnated bronze (ISO 5755)
Corrosion resistance
Good in water and general industrial atmospheres; attacked by ammonia and by strong acids
Magnetic response
Non-magnetic
Service temperature
solid bronze to about +200 °C; a sintered oil-impregnated bush is limited by its oil, roughly -20 °C to +100 °C
Property figures are typical for the material. In an assembled bearing the lubricant, the seals and the cage frequently reach their limits before the material does, so check all four against the duty. Material certification is available on request for production orders.
Bearing Bronze CuSn8 Wrapped Bronze Bushings: A sliding material: it is rated by a pv limit rather than by a basic dynamic load rating, and it tolerates edge loading, shock and contamination far better than a rolling bearing does. The material decides the corrosion behavior — good in water and general industrial atmospheres; attacked by ammonia and by strong acids and the temperature the part will stand (solid bronze to about +200 °C; a sintered oil-impregnated bush is limited by its oil, roughly -20 °C to +100 °C), and it is the reason the alternatives below exist. Properties, limits and the full size table follow.
Why Bearing Bronze for CuSn8 Wrapped Bronze Bushings
A sliding material: it is rated by a pv limit rather than by a basic dynamic load rating, and it tolerates edge loading, shock and contamination far better than a rolling bearing does. In a cusn8 wrapped bronze bushings it is the sliding surface itself: it carries the load and it is the part that wears.
Bronze slides against steel with a low tendency to seize, embeds the dirt that would otherwise score the shaft, and carries very high loads at low speed. It is the traditional answer for pivots, linkages and slow, heavily loaded shafts where a rolling bearing would be destroyed by shock or contamination.
Material Properties
Grade designation
tin bronze (CuSn12 and related grades, ISO 4382-1) and sintered oil-impregnated bronze (ISO 5755)
Magnetic response
Non-magnetic
Service temperature
Solid bronze to about +200 °C; a sintered oil-impregnated bush is limited by its oil, roughly -20 °C to +100 °C
Corrosion characteristic
Good in water and general industrial atmospheres; attacked by ammonia and by strong acids
Alternatives and When to Switch
A PTFE-composite bushing replaces bronze wherever the joint must run dry and unmaintained; a needle roller bearing replaces it wherever the movement is continuous rotation rather than a slow oscillation; and a spherical plain bearing replaces it wherever the shaft does not stay parallel to the bore.
What the Material Changes About the Bearing
A sliding bearing is not rated in the ISO 281 sense at all. There is no Cr and no L10 life to calculate: the material is specified against a permissible contact pressure and a pv limit, and its life is a wear life. The dimensions still follow the standard envelope, so the part is interchangeable — the calculation behind it is not.
Sizes of CuSn8 Wrapped Bronze Bushings Available in Bearing Bronze
Designation
Bore d (mm)
Outer diameter D (mm)
Length B (mm)
Wall thickness (mm)
WB 08u00d710u00d710
8
10
10
1.0
WB 10u00d712u00d710
10
12
10
1.0
WB 12u00d714u00d712
12
14
12
1.0
WB 14u00d716u00d715
14
16
15
1.0
WB 15u00d717u00d715
15
17
15
1.0
WB 16u00d718u00d715
16
18
15
1.0
WB 18u00d720u00d720
18
20
20
1.0
WB 20u00d723u00d720
20
23
20
1.5
WB 22u00d725u00d720
22
25
20
1.5
WB 25u00d728u00d720
25
28
20
1.5
WB 30u00d734u00d730
30
34
30
2.0
WB 35u00d739u00d730
35
39
30
2.0
WB 40u00d744u00d730
40
44
30
2.0
WB 45u00d750u00d740
45
50
40
2.5
WB 50u00d755u00d740
50
55
40
2.5
WB 60u00d765u00d750
60
65
50
2.5
WB 70u00d775u00d750
70
75
50
2.5
WB 80u00d785u00d760
80
85
60
2.5
Other ways to specify the CuSn8 Wrapped Bronze Bushings
The alternatives worth weighing against it are PTFE Composite, each written to the same headings so the comparison is a like-for-like one.
The same bearing can also be sized from the shaft on the 70 mm bore and 80 mm bore pages.
Customize the parameters below — every spec field is editable, and the drawing redraws to match the values you choose. Changing the designation snaps the other fields to that size's standard values; you can then override any individual value.
Sends the selected values to the quote form below.
Our facility
Where these dimensions are actually made
Ring forging, heat treatment, raceway grinding and superfinishing all happen under one roof, so a bore tolerance and a clearance group are set by processes we control and can evidence, not by whichever supplier had stock.
Request a Quote
The form below follows the current technical drawing configuration. Change the drawing values above and the request details update automatically.
Dimensions & Specifications (ISO 3547-1 / DIN 1494)
Third-party video, selected automatically for this topic. It is not produced by Bushing Bearings and is not a specification source — use the tables on this page for dimensional data.
Frequently Asked Questions
Why is Bearing Bronze used for this part?
Bronze slides against steel with a low tendency to seize, embeds the dirt that would otherwise score the shaft, and carries very high loads at low speed. It is the traditional answer for pivots, linkages and slow, heavily loaded shafts where a rolling bearing would be destroyed by shock or contamination.
What are the limits of Bearing Bronze?
The governing limit is pv — contact pressure multiplied by sliding velocity — not a load rating, and it is heat that enforces it. A sintered oil-impregnated bush has a second limit besides: it carries a finite quantity of oil in its pores, and once heat or a solvent has taken that oil out, the bush is running dry.
What should I use instead of Bearing Bronze?
A PTFE-composite bushing replaces bronze wherever the joint must run dry and unmaintained; a needle roller bearing replaces it wherever the movement is continuous rotation rather than a slow oscillation; and a spherical plain bearing replaces it wherever the shaft does not stay parallel to the bore.
Does Bearing Bronze change the dimensions or the rating?
A sliding bearing is not rated in the ISO 281 sense at all. There is no Cr and no L10 life to calculate: the material is specified against a permissible contact pressure and a pv limit, and its life is a wear life. The dimensions still follow the standard envelope, so the part is interchangeable — the calculation behind it is not.
How do I request a quotation?
Use the technical drawing on this page to pick the exact configuration, then submit it with the quote form. We respond within one business day.
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