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High-Quality MQ-090 Bronze Wrapped Bushing Suppliers in China - Durable, Low Friction Factory Products
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 / ISO 3547)
| 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
| Parameter | Condition | Value |
|---|---|---|
| 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 bushings store oil or grease, extending the lubrication interval to over 5 times longer than standard copper sleeves. This significantly reduces maintenance frequency and operating costs.
Q
What operating temperature range can MQ-090/092 bushings withstand?
These bushings are rated for a temperature range of −100℃ to +200℃, making them suitable for both extreme cold and high-heat industrial environments.
Q
What shaft surface hardness and roughness are required for proper matching?
The mating shaft should have a minimum hardness of ≥50 HRC and a surface roughness of Ra = 0.4~1.0 to ensure optimal bushing performance and longevity.
Q
What dimensional standard do MQ-090/092 bushings conform to?
The standard tolerances for MQ-090 and MQ-092 series bushings are manufactured in accordance with DIN 1494 / ISO 3547, covering outer diameter, housing bore (H7), inner diameter after mounting (H9), and shaft fit (f7 to f8).
Q
Are these bushings suitable for use in chemically aggressive environments?
Yes. MQ-090/092 Bronze Wrapped Bushings offer chemical resistance, making them appropriate for applications where exposure to oils, mild acids, or other industrial chemicals is expected.
Q
What is the maximum load capacity and PV limit of these bushings?
The static load capacity is 120 N/mm² and dynamic load capacity is 40 N/mm². Under grease lubrication, the maximum PV limit is 2.8 N/mm²·m/s with a maximum speed of 2.5 m/s.