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BlogThe products involve multiple fields such as plastics, composite materials, and functional materials, and are applied in areas such as rail transit, special equipment, new energy vehicles, and machinery manufacturing.
MC901 (Blue) vs MC907 (Natural): Are You Really Choosing the Right Cast Nylon?
2026-01-19
Conclusion First: Color Is Not “Better or Worse” — It’s an Identification & Selection Entry
Many buyers instinctively think “blue nylon must be better.”
In engineering plastics, however, color is mainly used for grade identification, batch control, and warehouse management—not as a direct indicator of performance.
What truly determines whether a part will wear well, stay dimensionally stable, or deform under load is the material formulation matched with the actual working conditions.
Within your product system, MC901 and MC907 are available as rods and sheets, with blue, natural, and custom colors, while emphasizing:
Stable surface finish
Dimensional consistency
Reduced risk of bubbles and internal defects during machining
These factors directly reduce machining risk and rework for distributors and CNC shops.
MC901 (Blue) vs MC907 (Natural): Direct Comparison Table
Note:
Definitions of “MC901” and “MC907” may vary slightly between manufacturers.
The table below follows an engineering selection perspective, translating hardness, heat resistance, and application focus into practical selection guidance. Final selection should be confirmed with datasheets, test data, or sample validation under real working conditions.
| Comparison Item | MC907 (Natural) | MC901 (Blue) |
|---|---|---|
| Typical Positioning | More general-purpose: wide adaptability for most wear, sliding, and support parts | More high-load / wear-focused: commonly used for heavy-duty transmission and wear components |
| Hardness (Selection Logic) | Balanced rigidity and hardness for most structural and wear applications | Many market versions emphasize toughness, wear resistance, and fatigue performance, suitable for high-load parts |
| Heat Resistance (Selection Logic) | Both belong to cast nylon (MC) systems; heat performance depends more on formulation and working conditions (load, speed, friction heat, cooling) | Same as left; datasheet confirmation or sample testing is recommended |
| Machinability & Stability | Suitable for standard turning, milling, drilling; dimensional control is manageable for most tolerances | For high-load parts, extra attention should be paid to thermal deformation, moisture-related dimensional change, and fit design |
| Typical Applications (non-food) | Sliders, guide rails, bushings, wear pads, rollers, liners, general mechanical structural parts | High-load gears, racks, sprockets/star wheels, heavy-duty guide wheels, wear transmission parts, impact and fatigue-loaded components |
| Purchasing Recommendation | If unsure, start with MC907 for general validation—better cost efficiency and wider applicability | For confirmed high-load transmission or heavy wear conditions, prioritize MC901 (blue) and confirm the specific performance grade |
Understanding “Hardness” and “Heat Resistance”: Don’t Focus on a Single Number
Many failures are not caused by “insufficient material strength”, but by unclear working-condition combinations:
High load + high speed + dry friction → rapid friction heat buildup
Increased temperature → higher risk of thermal deformation and accelerated wear
Combined with moisture absorption → dimensional drift and fit problems
Your standard MC nylon performance indicators (e.g. Shore D hardness, load heat-deflection temperature) are useful for initial screening, but they should not be the final decision criteria.
Recommended approach:
Use basic material properties to judge “can it work or not”
Finalize the grade and design based on load, speed, temperature, and friction conditions
Datasheets, test data, or sample validation under real conditions are strongly recommended for critical applications.
Application-Based Recommendations (Non-Food Use)
Typical Cases for Choosing MC907 (Natural)
General wear parts, sliding parts, or support components
Moderate load and speed, without extreme friction heat
Need a universal grade to quickly verify structure and dimensions while controlling cost
Typical Cases for Choosing MC901 (Blue)
High-load gears, racks, sprockets, heavy-duty guide wheels
Applications involving impact, vibration, or fatigue cycles
Priority on wear life and overall toughness, with willingness to confirm grade version or validate samples
One-Stop Supply: Reduce Trial-and-Error Costs
We supply MC901 and MC907 cast nylon rods and sheets, available in blue, natural, and custom colors, with emphasis on:
Stable dimensions
Smooth surface finish
Reduced risk of bubbles and internal defects
This helps distributors and machining customers source, stock, and machine with fewer iterations and less rework.
For Fast Quotation & Correct Selection: Please Provide These 6 Items
Preferred grade: MC901 (Blue) / MC907 (Natural) / Not sure (recommendation needed)
Dimensions: Diameter or thickness, length, quantity
Working conditions: Load (or pressure), speed (or cycle frequency), operating temperature
Friction conditions: Dry / lubricated / mating material (steel, aluminum, stainless steel, etc.)
Tolerance requirements: Key tolerances and fit design
Application type: Gear, bushing, slider, guide wheel, wear strip, etc.
Contact for quotation & datasheets:
WhatsApp / Phone: +86 19131914795
Email: hebeimcnylon@gmail.com
Website: https://www.hbhrhbkj.com/
FAQ
Is blue cast nylon always better than natural?
Not necessarily. Color is mainly for identification and management. Performance depends on formulation and working-condition matching, not color alone.
What if I’m not sure which grade to choose?
Start with MC907 for general validation—it offers higher adaptability and cost efficiency. Once the application is confirmed as high-load or heavy wear, switch to MC901 (blue) and validate the specific grade.
Why emphasize “no bubbles / no white core”?
Internal defects such as bubbles or white core increase machining uncertainty and can negatively affect strength and dimensional stability—leading to higher rework risk. For distributors and machining shops, consistency often matters more than a single headline property.
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