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China Suppliers Factory MQ-090 Bronze Wrapped Bushing - High Load Low Speed Bearing with CuSn Alloy
Application Characteristics
- 1 The advantages of light weight and low cost, for compact application, easy fitting.
- 2 Oil pockets stored oil or grease, then the time for apply oil is extended over 5 times than the ones of general copper sleeve.
- 3 Extremely high bearing capacity, especially can match the shafts with rough surfaces.
- 4 High heat dissipation, small expansion coefficient, stable use, long service life.
- 5 Excellent wear resistance with lower friction.
- 6 Chemical resistance.
Material Structure
Use high density bronze strips to roll the spherical oil pockets, in order to reduce wear, prolong the use time, good corrosion and protection function.
Jiashan Minqin Oilless Bearing Co., Ltd. a China Bronze Wrapped Bushings Manufacturers, set up May.2007. As professional wholesale Bronze Wrapped Bushings suppliers, Minqin has high-precision equipment, a high level of management team, and a high-quality workforce, and constantly improves the production process and refinement management platform, in strict accordance with the global quality certification system to do every detail for the industry to provide quality MQ-090 MQ-092 Bronze Wrapped Bushing products.
Standard Tolerance for MQ-090/092 Series Bushing (As per DIN 1494 / ISO3547)
| Standard Dia. | O.D. Size | Housing Bore (H7) | I.D. Size after Mounting (H9) | Matching Shaft Diameter (f7 to f8) |
|---|---|---|---|---|
| 10~18 | +0.065 +0.030 |
+0.018 0 |
+0.046 0 |
−0.016 −0.043 |
| 18~30 | +0.075 +0.035 |
+0.021 0 |
+0.052 0 |
−0.020 −0.020 |
| 30~50 | +0.085 +0.045 |
+0.025 0 |
+0.062 0 |
−0.025 −0.064 |
| 50~80 | +0.100 +0.055 |
+0.030 0 |
+0.074 0 |
−0.030 −0.076 |
| 80~120 | +0.120 +0.070 |
+0.035 0 |
+0.087 0 |
−0.036 −0.090 |
| 120~180 | +0.170 +0.100 |
+0.400 0 |
+0.100 0 |
−0.043 −0.106 |
| 180~250 | +0.210 +0.130 |
+0.046 0 |
+0.115 0 |
−0.050 −0.122 |
| 250~315 | +0.260 +0.170 |
+0.052 0 |
+0.130 0 |
−0.056 −0.137 |
Technical Data
| Max. Loading | Static | 120 N/mm² |
| Dynamic Load | 40 N/mm² | |
| Max. PV Limit | Grease Lubrication | 2.8 N/mm²·m/s |
| Max. Speed | 2.5 m/s | |
| Match the Axis | Hardness | ≥50 HRC |
| Roughness | Ra = 0.4~1.0 | |
| Friction Coefficient | 0.05~0.25 | |
| Tensile Strength | 470 N/mm² | |
| Yield Strength | 280 N/mm² | |
| Hardness | 100~120 HB | |
| Density | 8.8 g/cm³ | |
| Temperature Range | −100℃ ~ +200℃ | |
| Thermal Conductivity | 58 W(m·k)⁻¹ | |
| Coefficient of Thermal Expansion | 18.5×10⁻⁶·K⁻¹ |
Frequently Asked Questions
Q
What is the main advantage of MQ-090/092 Bronze Wrapped Bushings over general copper sleeves?
The oil pockets in MQ-090/092 Bronze Wrapped Bushings store oil or grease, extending the lubrication interval to over 5 times that of general copper sleeves. This significantly reduces maintenance frequency and downtime.
Q
What temperature range can the MQ-090/092 Bronze Wrapped Bushing withstand?
These bushings operate reliably across a wide temperature range of −100℃ to +200℃, making them suitable for both cold storage environments and high-temperature industrial applications.
Q
What shaft surface requirements are needed when matching the MQ-090/092 bushing?
The matching shaft should have a hardness of ≥50 HRC and a surface roughness of Ra = 0.4~1.0. Notably, these bushings can match shafts even with relatively rough surfaces, providing high bearing capacity.
Q
What standards do the MQ-090/092 series bushings comply with?
The standard tolerances for MQ-090/092 series bushings are specified as per DIN 1494 / ISO3547, covering outer diameter sizes from 10mm up to 315mm with corresponding housing bore and shaft diameter tolerances.
Q
Are MQ-090/092 Bronze Wrapped Bushings suitable for chemical environments?
Yes. These bushings offer chemical resistance, making them a reliable choice in environments exposed to lubricants, oils, and mild chemical substances. The high-density bronze construction also provides good corrosion protection.
Q
What is the maximum load capacity of the MQ-090/092 Bronze Wrapped Bushing?
The bushing supports a static load of up to 120 N/mm² and a dynamic load of up to 40 N/mm². The maximum PV limit under grease lubrication is 2.8 N/mm²·m/s, with a maximum operating speed of 2.5 m/s.