The Different Types Of Bearing Materials

Finding the right bearing for industrial applications is vital to ensuring high-level production, low-level downtime, secure maintenance programs, and a long-factory life.

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The benefits of oilless bronze bearings

Find Your Bronze Bushings’ Material

  • C95400 (CuAl11Fe4)  Aluminum Bronze, It Can Be Strengthened By Heat Treatment, Its Strength Is Higher Than Tin Bronze, And Its Resistance To High-Temperature Oxidation Is Better.

  • C93200 (CuSn7ZnPb) Bearing Bronze, The Alloy Has Reasonable Corrosion Resistance To Sea And Salt Water.

  • C86300 (CuZn24Al6Fe3Mn4)  Manganese Bronze, Wear resistance, excellent wear resistance. It’s suitable for high load, low-speed working conditions

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Bronze vs Brass, What is the difference?

Bronze and Brass are alloys of metal and are commonly used in the manufacturing industries today. Both metals are referred to as red metals as a result of their distinct reddish color. Bronze and Brass contain a varying number of other elements and as a result, they exist with varying properties. Being an alloy of copper, brass typically consists of copper and zinc while bronze is typically made of copper and tin.

ALLOY TYPE BS STANDARD EN STANDARD SYMBOL ASTM/UNS (NEAREST EQUIVALENT) OTHER COMPARABLE ALLOYS
Aluminium Bronze CA104 CW307G CuAl10Ni C63200 / C63000 NES833, BSB23(DTD197A)
Aluminium Bronze CA105 CuAl10Fe3Ni7Mn2 C63000
Aluminium Bronze AB1-C CC331G CuAl10Fe2-C C95400 SAE68
Aluminium Bronze AB2-C CC333G CuAl10Fe5Ni5-C C95500 SAE68B
Leaded Bronze LB1-C CC496K CuSn7Pb15-C C93800 SAE67
Leaded Bronze LB2-C CC495K CuSn10Pb10-C C93700 SAE64 / SAE797 / SAE792
Leaded Bronze LB4-C CC494K CuSn5Pb9-C C93500 SAE66
Leaded Bronze LB5-C CC497K CuSn5Pb20-C C94100 SAE94, SAE794 & SAE799.
Leaded Bronze CuSn7ZnPb C93200 SAE660
Leaded Gunmetal LG2-C CC491K CuSn5Zn5Pb5-C C83600 SAE40
Leaded Gunmetal LG4-C CC492K CuSn7Zn2Pb3-C C93400
Leaded phosphor bronze LPB1 CuSn8Pb4Zn1 C93100
Leaded Phosphor Bronze PB4-C CC480K CuSn10-C C92700
Nickel Gunmetal G3 CuSn7Ni5Zn3 B292-56
Phosphor Bronze PB101 CW450K CuSn4 C50900 C51100
Phosphor Bronze PB102 CW451K CuSn5 C51000 NES838
Phosphor Bronze PB103 CW452K CuSn6 C51900
Phosphor Bronze PB104 CW459K CuSn8 C52100 BSB24 DTD265A
Phosphor Bronze DTD265A BSB24, PB104
Tin Phosphor Bronze PB1-C CC481K CuSn11P-C B143 SAE65
Tin Phosphor Bronze PB2-C CC483K CuSn12-C CC483K SAE65
Copper Alloy UNS No. Designation
C83600 Leaded Red Brass
C83800 Leaded Red Brass
C84200 Leaded Red Brass
C84400 Leaded Red Brass
C84800 Leaded Red Brass
C85700 Leaded Red Brass
C86200 Manganese Bronze
C86300 Manganese Bronze
C86500 Manganese Bronze
C87850 Eco Brass
C89320 Bismuth Tin Bronze
C89325 Federalloy
C89831 Federalloy
C89833 Federalloy
C89835 Federalloy
C89844 Federalloy
C90300 High Tin Bronze
C90500 High Tin Bronze
C90700 High Tin Bronze
C90800 High Tin Bronze
C90810 High Tin Bronze
C91000 High Tin Bronze
C91100 High Tin Bronze
C91300 High Tin Bronze
C91600 High Tin Bronze
C91700 High Tin Bronze
C92200 Leaded Tin Bronze
C92300 Leaded Tin Bronze
C92500 Nickel-Phosphor Bronze
C92700 Leaded Tin Bronze
C92800 Leaded Tin Bronze
C92900 Leaded Nickel-Tin Bronze
C93200* Leaded Tin Bronze
C93400 High-Leaded Tin Bronze
C93500 High-Leaded Tin Bronze
C93600 High-Leaded Tin Bronze
C93700 High-Leaded Tin Bronze
C93800 High-Leaded Tin Bronze
C93900 High-Leaded Tin Bronze
C94000 High-Leaded Tin Bronze
C94100 High-Leaded Tin Bronze
C94300 High-Leaded Tin Bronze
C94700 Nickel-Tin Bronze
C94700HT Nickel-Tin Bronze
C94800 Leaded Nickel-Tin Bronze
C95200 Aluminum Bronze
C95300 Aluminum Bronze
C95300HT Aluminum Bronze
C95400 Aluminum Bronze
C95400HT Aluminum Bronze
C95410 Aluminum Bronze
C95410HT Aluminum Bronze
C95500* Nickel-Aluminum Bronze
C95500HT Nickel-Aluminum Bronze
C95510HT Nickel-Aluminum Bronze
C95520HT Nickel-Aluminum Bronze
C95800 Nickel-Aluminum Bronze
C95900* Aluminum Bronze
Concast380* Aluminum Bronze
C97300 Nickel Silver Bronze
C97600 Nickel Silver Bronze
C97800 Nickel Silver Bronze
C99500 Special Alloy

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Bronze Vs Brass

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What is bronze?

Bronze is a metal alloy that is made up of copper and tin primarily. This metal dates back to 3500 BC with the Sumerians and this age was referred to as the Bronze age. It is regarded as a copper alloy and is defined based on its working properties as well as specific alloying elements.

Consequently, bronze properties and characteristics can be improved using different elemental compositions. Such metals include manganese, nickel, silicon, lead, antimony, zinc, and many more. Due to this, designers are presented with a wide array of bronze grades to choose from. Bronze is typically reddish-brown/gold and it’s brittle but less so compared to cast iron.

In comparison, bronze as copper alloy contains copper (Cu) and tin (sn) while its main components depend on its alloy form:

  • Aluminum
  • Lead (Pb)
  • Antimony
  • Nickel (Ni)
  • Phosphorus (P)
  • Silicon (Si)
  • Sulfur (S)
  • Cobalt
  • Chromium
  • Zinc

What is brass?

Brass was discovered by users around 500 BC with much overlap with bronze. Brass is a metal alloy that primarily copper and zinc. Its elemental composition of metals includes tin, iron, aluminum, lead, silicon, and manganese. These elemental composition helps to achieve varying electrical and mechanical properties in brass. Taking zinc content as an example, it helps brass to enhance the ductility and strength of the base copper material. Evidence has proven that the higher the zinc concentration of brass, the more pliable and stronger its alloy.

Brass can exist in a color range including bright gold, silver, and many more depending on the ratio of zinc to copper. It can be said to be more ductile compared to zinc with similarly low friction when machined with other metals. Besides, brass is often known for its decorative application because of its gold resemblance.

On the other hand, brass as a metal is simply an alloy of copper and zinc. In nature, its primary elemental composition includes Copper (Cu) and Zinc (Zn) while it may have the following components depending on the form of alloy:

  • Tin (Sn)
  • Sulfur (S)
  • Silicon (Si)
  • Phosphorus (P)
  • Nickel (Ni)
  • Lead (Pb)
  • Iron (Fe)
  • Antimony (Sb)
  • Aluminum (Al)

Tin Bronze Vs Aluminum Bronze Vs Aluminum Brass

The tin bronze solid inlaid bearing has good friction performance, its friction factor is the smallest among various inlaid bearings, and the change is also small. The inter-surface changed from dry friction state to boundary lubrication state. Sn element in tin bronze is incompatible with Fe element in abrasive parts, which can reduce friction factors and improve friction performance to a certain extent.

The friction factor of the aluminum bronze solid inlaid bearing fluctuates greatly throughout the working process, and the friction performance is relatively poor, because the affinity of the aluminum bronze al element and the Fe element is large, resulting in a large adhesion tendency, on the other hand, the solid lubricant transfer film The weak bonding force with the aluminum bronze matrix makes it easy to break so that there is a dry friction state between the grinding surfaces. In addition, the aluminum bronze easily forms a coarse structure during casting, so the friction performance is unstable.

The friction performance of aluminum-brass inlaid bearings is also not good, and the friction factor is large. Aluminium-brass inlaid bearing surfaces form only a small amount of solids

The lubricant is transferred to the film, and the copper chips ground from the substrate also cover the solid lubricant. This is mainly because the hardness of the aluminum brass is relatively small, and the bonding force between the solid lubricant transfer film and the aluminum brass is small, which makes the transfer The membrane ruptures before it can form. In addition, the Al element contained in the aluminum brass leads to a larger friction factor when the aluminum brass inlaid bearing is ground against the upper sample.

Conclusion

Tin bronze inlaid bearings have excellent friction and wear properties, so tin bronze is suitable for use as a base material for solid lubricant inlaid bearings; aluminum brass and aluminum bronze inlaid bearings have relatively poor friction properties.

In order to make the working performance of the embedded bearing more stable, it is better to coat a lubricating oil film on the surface before it works to avoid dry friction before the solid lubricant transfer film

The wear surface roughness of copper alloy inlaid bearings is related to the change of friction factor.

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Bronze Bushing Material Data

Material Unit SO#50SP2 SO#50SP5 SO#50SP7 SO#50SP8 SO#50SP13 SO#50B Hard bronze Sinter bronze SO#50PB CuSn8 SO#50S45C SO#50F Poly-acetal
Hard brass with graphite
Hard brass with graphite
Aluminum-bronze with graphite
Hard brass with graphite
Bronze with graphite
Red brass with graphite
Tin Bronze
acc. to DIN 17662
Steel with graphite
Grey cast iron with graphite
Plastic
Self-lubricating
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
No
Yes
Yes
No
Lubricant
Graphite
Graphite
Graphite
Graphite
Graphite
Graphite
Oil
Graphite
Graphite
Max. surface pressure
N/mm²
100
100
120
130
120
50
125
50
80
40
30
5
25
35 (with oil)
Max. sliding speed
m/min
30
30
20
30
20
50
30
300
50
120
15
15
50
200 (with oil)
Max. P*v-Value
N/mm² x m/min
200
200
250
250
250
100
1600
100
80
50
100
200 (with oil)
Operating temperature Standard
°C
-50 / +200
-50 / +200
-50 / +200
-50 / +200
-50 / +200
-50 / +200
-12 / +90
-50 / +200
-200 / +200
-50 / +150
-50 / +150
-50 / +80
Max.
+300
+300
+300
+300
+400
+300
+300
Friction coefficient ** initial
0,15
0,15
0,15
0,1
0,2
0,15
0,09
0,15
long term.
0,07
0,07
0,07
0,09
0,15
0,07
0,07
Brinell hardeness
HB
>210
>210
>260
220 ~ 260
>280
>60
>25
>80
>40
160 ~ 220
115 (HRR)
Further information
Elongation
%
>12
>18
>2
>3
>0,5
>15
>5
19
73
Density
kg/dm³
7,9
7,7
7,8
7,8
7,2
8,7
6,5 ~ 7,0
8,2
8,8
7,8
7,1 ~ 7,3
1,4
Tensile strength
N/mm²
>755
>686
>833
>700
>550
>195
>295
>690
>250
69
Yield strength
N/mm²
>412
>372
>509
>105
>161
E-Module
N/mm²
97.000
108.000
123.600
108.000
145.000
96.000
108.000
115.000
Thermal expansion
10^(-5)*grd^(-1)
1,9
1,6
1,6
1,9
1,7
1,8
1,8
1,1
1
7,7

* Bronze Bushing Material used according to  standards

Bronze Bushing Material Data

Material
SO#50SP2
SO#50B
SO#50SP5
SO#50F
SO# the 50S
Poly-acetal
SO#50SP7
SO#50SP8
SO#50SP13
SO#50AlB
High strength brass casting
Bronze casting
Aluminum bronze casting
Iron cast
Austenite type stainless steel

* Bronze Bushing Material used according to  standards

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