Engine connecting rod bushes made from high tin aluminum alloys
offer superior performance and durability in demanding automotive
applications. These bushes, also known as big-end bearings or
crankpin bearings, play a crucial role in the efficient and
reliable operation of internal combustion engines.
High tin aluminum alloys, typically containing a significant
percentage of tin (Sn) along with aluminum (Al) and other alloying
elements, are chosen for their excellent wear resistance, fatigue
strength, and thermal conductivity. These properties ensure that
the connecting rod bushes can withstand the high temperatures,
pressures, and dynamic loads generated by the reciprocating motion
of the piston and connecting rod.
In addition to their material properties, the precision
manufacturing process ensures that the connecting rod bushes fit
precisely into the connecting rod and crankshaft journals. This
precise fit reduces friction and wear, improving engine efficiency
and durability.
The use of high tin aluminum alloys in engine connecting rod bushes
has become increasingly common in modern automotive engines,
particularly in high-performance and racing applications. These
bushes are able to meet the demanding requirements of these
engines, providing superior reliability and durability under
extreme operating conditions.
Overall, engine connecting rod bushes made from high tin aluminum
alloys are an essential component for ensuring the smooth and
efficient operation of internal combustion engines. They provide
superior wear resistance, fatigue strength, and thermal
conductivity, making them a reliable choice for a wide range of
automotive applications.
Engine Connecting Rod Bush High Tin Aluminum
The development trend of sliding bearing materials was pointed out,
which was to develop the unleaded bearing materials and speed up
research and development in new materials and technologies.
Internal combustion engine connecting rod bush bushing, bimetallic
tin aluminum alloy bearing, JF-20 high tin aluminum axle bush
bearing
JF-20 443946 aluminium base bearing alloy |
The inner diameter
39 (mm)
Outer diameter
44 (mm)
The thickness of the
46 (mm)
Product Introduction
Aluminum bushing, steel bronze bimetal bushes, composite bush has a
combination of high strength, load-bearing capacity, and the
advantages of good wear resistance. Particularly suited to
medium-speed and low-speed high-contained set and so on.
High tin aluminum bearing, is based on steel matrix, the surface of roller AISn20Cu material
products. This product has secondary fatigue strength and bearing capacity, good corrosion
resistance, good sliding properties, etc. This product is used for medium and small power of internal
combustion engine bearing shell machine collar axis, the train
engine bearings, air, is replacing novel products.
Technical Data
| Maximum dynamic load | 90P N/mm² | The highest temperature(°C) | Grease lubrication | 150°C |
| Maximum linear velocity | Grease lubrication | —— | Fluid lubrication | 250°C |
| High PV value | —— | Match the diameter of the axle | hardness HRC | ≥270 |
| The coefficient of friction(μ) | —— | roughness Ra | 0.16~0.63 |
| Maximum linear velocity | Fluid lubrication | 15 | Alloy layer hardness | 30~40 |
| High PV value | 8 | Coefficient of thermal conductivity | 47W/mk |
| The coefficient of friction(μ) | 0.04~0.12 | Linear expansion coefficient (axial) | 18×10-6/K |
Thickness Tolerance Between Inner Hole Machining And Non-machining
Normal Thickness |
Tolerances of Series B (non-machinable) |
Tolerances of Series C (non-machinable) |
| 1.0 | -0.025 | +0.25
+0.15 |
| 2.0 | -0.030 | +0.25
+0.15 |
| 2.5 | -0.035 | +0.25
+0.15 |
| 3.0 | -0.040 | +0.30
+0.15 |
| 3.5 | -0.045 | +0.30
+0.15 |
| 3.5 | -0.050 | +0.30
+0.15 |
Application Field
Engineering machinery: end of popular institutions supporting wheel
shaft sleeve, towing axle sleeve, tensioning shaft sleeve; Auto
industry: the balance shaft lining, steel pin bushing, steering
knuckle main shaft sleeve shaw, connecting rod bushings, valve
rocker arm shaft sleeve, CAM shaft collar, differential bushings,
transmission shaft sleeve, the internal combustion engine spindle
watts, thrust washers, And plunger pump side piece, such as a piece
of gear pump side.
Oil Holes Form
Buckles Form
| Size | Customizable |
| Certification | ISO9001, TS16949 |
| Processing methods | Cold-extrusion |
| Operating temperature | 150℃(Grease lubrication),250℃(Oil lubrication) |
| Material | Steel+AlSn20Cu |
| Surface treatment | Copper Plating/Tin Plating |
| Typical Application | High speed, heavy load engine main shaft, and air compressor,
cooling machine, etc. |
Bimetal bushings Standard dimensions Chart
| Bushing | Nominal dimensions | Finished dimensions |
| Steel backed aluminum bimetal bushing | Bushing inner diameter | Housing inner diameter | Housing inner diameter H7 | Axle diameter f7, e7 | Housing inner diameter H7 after assembly | Bushing outer diameter | Bushing length | Thickness (alloy thickness 0.3 mm) |
| Steel backed aluminum bimetal bushing | 10 | 12 | 12 +0.018 0 | 10 f7 -0.013 -0.028 | 10 +0.015 0 | 12 +0.068 +0.043 | 5. 10. 15 |
1.0 0 -0.015 |
| Steel backed aluminum bimetal bushing | 12 | 14 | 14 +0.018 0 | 12 f7 -0.016 -0.034 | 12 +0.018 0 | 14 +0.068 +0.043 | 5. 15. 20 |
| Steel backed aluminum bimetal bushing | 15 | 17 | 17 +0.018 0 | 15 -0.016 -0.034 | 15 +0.018 0 | 17 +0.068 +0.043 | 10. 15. 20 |
| Steel backed aluminum bimetal bushing | 18 | 20 | 20 +0.021 0 | 18 -0.016 -0.034 | 18 +0.018 0 | 20 +0.086 +0.056 | 10. 20. 30 |
| Steel backed aluminum bimetal bushing | 20 | 23 | 23 +0.021 0 | 20 f7 -0.020 -0.041 | 20 +0.021 0 | 23 +0.086 +0.056 | 10. 20. 30 |
1.5 0 -0.015 |
| Steel backed aluminum bimetal bushing | 22 | 25 | 25 +0.021 0 | 22 -0.020 -0.041 | 22 +0.021 0 | 25 +0.086 +0.056 | 15. 25. 40 |
| Steel backed aluminum bimetal bushing | 25 | 28 | 28 +0.021 0 | 25 -0.020 -0.041 | 25 +0.021 0 | 28 +0.086 +0.056 | 15. 30. 40 |
| Steel backed aluminum bimetal bushing | 28 | 32 | 32 +0.025 0 | 28 -0.020 -0.041 | 28 +0.021 0 | 32 +0.115 +0.075 | 15. 30. 50 |
2.0 0 -0.02 |
| Steel backed aluminum bimetal bushing | 30 | 34 | 34 +0.025 0 | 30 -0.020 -0.041 | 30 +0.021 0 | 34 +0.115 +0.075 | 15. 30. 50 |
| Steel backed aluminum bimetal bushing | 32 | 36 | 36 +0.025 0 | 32 f7 -0.025 -0.050 | 32 +0.025 0 | 36 +0.115 +0.075 | 20. 40. 50 |
| Steel backed aluminum bimetal bushing | 35 | 39 | 39 +0.025 0 | 35 -0.025 -0.050 | 35 +0.025 0 | 39 +0.115 +0.075 | 20. 40. 60 |
| Steel backed aluminum bimetal bushing | 38 | 42 | 42 +0.025 0 | 38 -0.025 -0.050 | 38 +0.025 0 | 42 +0.115 +0.075 | 20. 40. 60 |
| Steel backed aluminum bimetal bushing | 40 | 44 | 44 +0.025 0 | 40 -0.025 -0.050 | 40 +0.025 0 | 44 +0.115 +0.075 | 20. 40. 60 |
| Steel backed aluminum bimetal bushing | 42 | 46 | 46 +0.025 0 | 42 -0.025 -0.050 | 42 +0.025 0 | 46 +0.115 +0.075 | 20. 40. 60 |
| Steel backed aluminum bimetal bushing | 45 | 50 | 50 +0.025 0 | 45 -0.025 -0.050 | 45 +0.025 0 | 50 +0.115 +0.075 | 30. 50. 80 |
2.5 0 -0.025 |
| Steel backed aluminum bimetal bushing | 48 | 53 | 53 +0.030 0 | 48 -0.025 -0.050 | 48 +0.025 0 | 53 +0.145 +0.095 | 30. 50. 80 |
| Steel backed aluminum bimetal bushing | 50 | 55 | 55 +0.030 0 | 50 -0.025 -0.050 | 50 +0.025 0 | 55 +0.145 +0.095 | 30. 50. 80 |
| Steel backed aluminum bimetal bushing | 52 | 57 | 57 +0.030 0 | 52 e7 -0.060 -0.090 | 52 +0.030 0 | 57 +0.145 +0.095 | 30. 60. 80 |
| Steel backed aluminum bimetal bushing | 55 | 60 | 60 +0.030 0 | 55 -0.060 -0.090 | 55 +0.030 0 | 60 +0.145 +0.095 | 30. 60. 90 |
| Steel backed aluminum bimetal bushing | 60 | 65 | 65 +0.030 0 | 60 -0.060 -0.090 | 60 +0.030 0 | 65 +0.145 +0.095 | 30. 60. 90 |
| Steel backed aluminum bimetal bushing | 65 | 70 | 70 +0.030 0 | 65 -0.060 -0.090 | 65 +0.030 0 | 70 +0.145 +0.095 | 30. 70. 100 |
| Steel backed aluminum bimetal bushing | 70 | 76 | 76 +0.030 0 | 70 -0.060 -0.090 | 70 +0.030 0 | 76 +0.160 +0.095 | 40. 70. 100 |
3.0 0 -0.03 |
| Steel backed aluminum bimetal bushing | 75 | 81 | 81 +0.035 0 | 75 -0.060 -0.090 | 75 +0.030 0 | 81 +0.165 +0.100 | 40. 80. 100 |
| Steel backed aluminum bimetal bushing | 80 | 86 | 86 +0.035 0 | 80 -0.060 -0.090 | 80 +0.030 0 | 86 +0.165 +0.100 | 40. 80. 100 |
| Steel backed aluminum bimetal bushing | 85 | 91 | 91 +0.035 0 | 85 e7 -0.072 -0.107 | 85 +0.035 0 | 91 +0.165 +0.100 | 40. 90. 100 |
| Steel backed aluminum bimetal bushing | 90 | 96 | 96 +0.035 0 | 90 -0.072 -0.107 | 90 +0.035 0 | 96 +0.165 +0.100 | 50. 100 |
| Steel backed aluminum bimetal bushing | 100 | 106 | 106 +0.035 0 | 100 -0.072 -0.107 | 100 +0.035 0 | 106 +0.180 +0.115 | 50. 100 |
| Steel backed aluminum bimetal bushing | 110 | 117 | 117 +0.035 0 | 110 -0.072 -0.107 | 110 +0.035 0 | 117 +0.180 +0.115 | 60. 100 |
3.5 0 -0.035 |
| Steel backed aluminum bimetal bushing | 120 | 127 | 127 +0.040 0 | 120 -0.072 -0.107 | 120 +0.035 0 | 127 +0.185 +0.120 | 60. 100 |
This is a made-to-order product that we do not keep inventory for.
Additional construction work for oil grooves and lubrication
channels may be required depending on the actual conditions of use.
