12018 bearing dimensions:What are the basic dimensions of a 12018 bearing?
Q: What are the basic dimensions of a 12018 bearing?
A: A 12018 bearing is a double-row self-aligning ball bearing. Its basic dimensions are: bore diameter 90 mm, outer diameter 140 mm, and width 32 mm. These dimensions follow ISO standards. The bearing typically has a dynamic load rating of around 64 kN and a static load rating of about 27 kN. It is designed for applications where misalignment may occur, as it can accommodate angular misalignment of up to 3 degrees. The 12018 bearing is commonly used in industrial machinery, conveyors, and agricultural equipment.
Q: What is the bore diameter of a 12018 bearing?
A: The bore diameter of a 12018 bearing is 90 mm. This is the inner diameter of the bearing, which fits onto a 90 mm shaft. The '18' in the bearing number indicates a bore size code, where the actual bore diameter is calculated by multiplying the last two digits by 5. So 18 × 5 = 90 mm. This bore size is standard for self-aligning ball bearings in the 12000 series. It is important to verify the bore diameter when selecting a bearing, as it must match the shaft size for proper fit and function.
Q: What is the outer diameter of a 12018 bearing?
A: The outer diameter of a 12018 bearing is 140 mm. This dimension is critical for ensuring the bearing fits properly into the housing. The outer diameter is measured across the outer ring. For a 12018 self-aligning ball bearing, the outer diameter of 140 mm corresponds to its standard size. When designing a housing, the bore should be machined to this diameter with appropriate tolerances. The outer diameter also affects the bearing's load-carrying capacity and speed limits. Always refer to the manufacturer's catalog for exact specifications.
Q: What is the width of a 12018 bearing?
A: The width of a 12018 bearing is 32 mm. This is the axial dimension from one side of the bearing to the other. The width is important for determining the space required in the axial direction and for calculating the bearing's load distribution. In a self-aligning ball bearing, the width along with other dimensions ensures the proper internal clearance and alignment capability. When mounting, the width must be considered to ensure there is enough space and that the bearing is properly seated against shoulders on the shaft and housing.
Q: What are the load ratings for a 12018 bearing?
A: The load ratings for a 12018 bearing vary slightly by manufacturer, but typical values are: dynamic load rating (Cr) around 64 kN and static load rating (C0r) around 27 kN. These ratings indicate the bearing's ability to withstand radial loads. The dynamic rating is used for calculating fatigue life, while the static rating is for maximum load without permanent deformation. The 12018 bearing is designed primarily for radial loads but can also accommodate moderate axial loads in both directions due to its double-row design. Always consult the specific manufacturer's data for precise ratings.
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Common scenarios of "12018 bearing dimensions"
【Engineer】 Hi, I'm working on a project and need the dimensions for a 12018 bearing. Can you help?
【Supplier】 Of course! The 12018 bearing is a self-aligning ball bearing. Its dimensions are: inner diameter 90 mm, outer diameter 140 mm, and width 24 mm.
【Engineer】 Thanks! Just to confirm, is that inner diameter 90 mm? I've seen some sources list it as 90 mm, but others say 90 mm. I want to be sure.
【Supplier】 Yes, the inner diameter is definitely 90 mm. The 12018 bearing follows the standard metric series, so the bore is 90 mm.
【Engineer】 Great. What about the outer diameter? Is it 140 mm exactly?
【Supplier】 Correct, the outer diameter is 140 mm. This is consistent across major manufacturers like SKF, NSK, and FAG.
【Engineer】 And the width? I've heard it might be 24 mm, but I've also seen 30 mm for some self-aligning bearings.
【Supplier】 For the 12018, the width is 24 mm. The 30 mm width you're thinking of might be for a different series, like the 13018, which has a wider design.
【Engineer】 Ah, that makes sense. So 12018: 90x140x24 mm. What about the chamfer dimensions or fillet radius?
【Supplier】 The minimum chamfer dimension for the 12018 is typically 1.5 mm for both the inner and outer rings. This is important for proper mounting and to avoid stress concentrations.
【Engineer】 Good to know. Are there any other critical dimensions I should be aware of, like the shoulder diameter?
【Supplier】 Yes, the recommended shoulder diameter for the shaft (da) is about 99 mm, and for the housing (Da) it's about 131 mm. These ensure proper support and clearance.
【Engineer】 Thanks. What about the basic load ratings? That might affect my design.
【Supplier】 The dynamic load rating (Cr) is around 39.0 kN, and the static load rating (C0r) is about 15.6 kN. These values can vary slightly by manufacturer, so always check the specific catalog.
【Engineer】 I'll keep that in mind. Is the 12018 bearing available with a tapered bore? I might need that for an adapter sleeve.
【Supplier】 Yes, the 12018 K is the version with a tapered bore (1:12). The dimensions remain the same, but the bore is tapered. The adapter sleeve would be H218, for example.
【Engineer】 Perfect. I think I have all the info I need. Thanks for your help!
【Supplier】 You're welcome! If you need a quote or more details, feel free to reach out. Good luck with your project!
【Engineer】 Will do. Have a great day!
【Supplier】 You too! Goodbye.
