On Amazon.co.jp, the search query 1 21 1 1mm 50mm typically surfaces cylindrical components, precision rods, or hardware items with exact dimensional specifications. Buyers use this keyword to find products that match a shaft size of 1 mm, a length of 21 mm, a diameter of 1 mm, and a secondary length of 50 mm, often for mechanical, electronic, or prototyping applications.
Understanding how these dimensional parameters appear in product listings, technical sheets, and search filters helps procurement teams and engineers compare options quickly and avoid specification mismatches in assembly or repair workflows.
| Keyword Part | Typical Meaning | Common Product Types | Use Case Example |
|---|---|---|---|
| 1 | Diameter or primary size in mm | Shaft, rod, pin | Spindle for miniature motor |
| 21 | Length in mm | Stylus, guide sleeve | Travel length of actuator |
| 1 | Secondary diameter or tip size | Bolt head, connector pin | Contact point for connector |
| 50 | Extended length in mm | Probe, mounting stem | Depth measurement probe |
Product Specifications for 1 21 1 1mm 50mm on Amazon.co.jp
When shoppers filter by exact dimensions on Amazon.co.jp, listings matching 1 21 1 1mm 50mm often show items with structured specifications. Engineers rely on these numeric patterns to verify compatibility with housings, printed circuit boards, or mechanical linkages.
Each number in the query corresponds to a measurable attribute such as outer diameter, length, thread pitch, or total extension. Cross referencing these values with tolerance grades and material data ensures the selected component meets functional and safety requirements.
Material and Construction Types
Components described by 1 21 1 1mm 50mm on Amazon.co.jp may use stainless steel, brass, aluminum, or engineered plastics depending on the intended environment. Material choice affects corrosion resistance, electrical conductivity, weight, and compatibility with lubricants or cleaning agents.
Surface treatments such as passivation, anodizing, or coating are often listed in the product details. These finishes influence friction, wear resistance, and suitability for medical, food processing, or outdoor applications where chemical exposure is a concern.
Dimensional Accuracy and Tolerances
For precision uses, the listed dimensional tolerance becomes a critical factor when interpreting 1 21 1 1mm 50mm searches on Amazon.co.jp. Tight tolerances support smooth motion in linear assemblies and reduce the need for post installation adjustments.
Metrology methods like optical scanning or slip gauge calibration are typically noted in the technical description. Buyers in regulated sectors often request conformance documentation to confirm that the supplier adheres to recognized quality standards.
Mounting and Integration Methods
Items matching 1 21 1 1mm 50mm on Amazon.co.jp frequently include features such as tapped holes, set screws, snap rings grooves, or interference fit shoulders. Clear documentation of these features helps designers avoid over tightening, misalignment, or damage to adjacent components.
Integration guidance in manuals or listing images shows recommended torque ranges, insertion angles, and tool types. Following these instructions supports reliable assembly and long term performance in dynamic mechanisms.
Key Takeaways for Selecting 1 21 1 1mm 50mm Products
- Verify dimensional tolerances against your mechanical clearance and interference requirements.
- Confirm material and surface treatment compatibility with the operating environment.
- Review mounting details, torque limits, and integration instructions before assembly.
- Check for traceability data, test reports, and regulatory markings when used in regulated applications.
- Compare multiple listings using a structured specification table to avoid errors in selection.
FAQ
Reader questions
Is this item suitable for use in cleanroom or semiconductor processes?
Check the material, surface finish, and particle emission data in the product details; components marketed for electronics often meet specific cleanliness and outgassing criteria.
What are the recommended torque limits for securing this component?
Refer to the technical drawing or specification sheet provided by the seller; generic guidance is available only if the material, coating, and interface geometry are clearly documented.
Can this part withstand repeated thermal cycling without deformation?
Review the thermal expansion coefficient, annealing state, and dimensional stability data; items designed for optomechanical or sensor assemblies usually list these values.
Does the listing include compliance information for export controlled regions?
Look for regulatory markings, restriction notes, or certification logos in the product images and description, and verify with the seller if your application requires specific compliance documentation.