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China Suppliers Factory MQ-090 Bronze Wrapped Bushing - High Load Low Speed Applications
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. (mm) | 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 |
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Frequently Asked Questions
Q1: What is the MQ-090/092 Bronze Wrapped Bushing?
The MQ-090/092 is a self-lubricating bronze wrapped bushing manufactured from high-density bronze strips with spherical oil pockets. It is designed for compact, maintenance-friendly applications requiring high bearing capacity and wear resistance.
Q2: How does the oil pocket design extend lubrication intervals?
The spherical oil pockets embedded in the bronze strip store oil or grease and release it gradually during operation. This self-lubricating mechanism extends lubrication intervals more than 5 times compared to standard copper sleeves.
Q3: What temperature range can MQ-090/092 bushings handle?
These bushings operate reliably across a wide temperature range of −100℃ to +200℃, making them suitable for both low-temperature and elevated-temperature industrial environments.
Q4: What shaft surface conditions are compatible with this bushing?
The MQ-090/092 bushing can accommodate shafts with relatively rough surfaces. The matching shaft should have a hardness of ≥50 HRC and a roughness of Ra = 0.4 ~ 1.0 for optimal performance.
Q5: What dimensional standards does the MQ-090/092 series comply with?
The standard tolerances for MQ-090/092 series bushings conform to DIN 1494 / ISO 3547, covering bore diameter ranges from 10 mm up to 315 mm with defined housing bore (H7) and shaft fit (f7 to f8) tolerances.
Q6: Is the MQ-090/092 bushing suitable for chemical environments?
Yes. The bronze material used in MQ-090/092 bushings offers good chemical resistance, making them appropriate for use in environments where exposure to oils, mild acids, or other industrial chemicals may occur.