Field Notes on the Clutch Disc 30100-AA640: Real-World Fit, Specs, and Sourcing Tips

If you wrench for a living (or that friend everyone calls on a Sunday), you know clutch discs live in the messy space between spec sheets and human driving habits. The Clutch Disc 30100-AA640 is one of those references that pops up in cross-lists—often linked with MB937354 and the MITSUBISHI CARISMA DA2A. To be honest, part numbers can be fussy; always confirm by VIN and spline data, because real-world fit depends on submodels and production runs.

Origin and Industry Context

This model is produced around Julu industrial zone, Xingtai city, Hebei province—a cluster that’s quietly become a friction-materials stronghold in North China. Many customers say the supply from this region has tightened tolerances over the past five years, and, surprisingly, finish quality has kept pace with bigger-name suppliers.

Materials and Manufacturing Flow (Short Version)

• Facings: organic woven mix with copper/aramid fibers and graphite for stable µ; resin-bonded, heat-cured.
• Core: tempered spring steel plate with marcel wave; riveted construction.
• Hub: splined alloy steel, induction-hardened; anti-corrosion coating.
• Damper: multi-spring pack with progressive rates; shot-peened springs.
• Methods: CNC stamping, automated riveting, dynamic balancing (≈ G16 per ISO 21940), runout check, and burst test.

Product Snapshot and Specs

These values reflect typical production for compact sedans; real-world use may vary slightly by batch and hub spline spec. Always verify before ordering.

Testing, Standards, and Certifications

• Friction stability: dyno tested against FF band; Chase-type references per SAE J661.
• Dynamic balance: up to G16 class (ISO 21940 guidance).
• Quality system: plants commonly audited to IATF 16949 and ISO 9001 frameworks.
• Salt spray (hub): up to 24–48 h per ISO 9227, around typical aftermarket practice.

Where It’s Used

Typical fitment notes associate the Clutch Disc 30100-AA640 with MB937354 references and MITSUBISHI CARISMA DA2A configurations. Also seen in independent catalogs for similar compact platforms. Again—check spline and diameter; I guess that’s the unglamorous but important bit.

Vendor Landscape (Quick Compare)

Customization and Ordering Tips

• Confirm dimensions and spline count before PO; ask for a drawing.
• Pick friction recipe: comfort-focused organic vs. higher µ (slightly more chatter).
• Request COC, balance report, and burst test note; it helps with warranty audits.

Mini Case Study

One taxi cooperative (mixed compact sedans) trialed the Clutch Disc 30100-AA640 against a mid-tier aftermarket unit. Over 40,000 km, drivers reported smoother take-up in hot traffic and fewer shudders on hill starts. Teardown showed even wear and intact damper springs. It’s just one data point, but it tracks with the lab friction stability we’ve seen.

Customer Feedback (Anecdotal)

• “Pedal feel is predictable; no burnt smell under moderate slip.”
• “Balancing seems good—reduced vibration after install.”
• “Packaging could be sturdier, but disc arrived true.”

Citations:

1. Official product information – Clutch Disc 30100-AA640
2. IATF 16949 overview – International Automotive Task Force
3. SAE J866 – Friction Material Quality and Classification
4. ISO 21940 – Mechanical vibration, rotor balancing