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ASTM D1646 ISO 289 Digital Mooney Viscometer ±0.3°C Accuracy for Rubber Viscosity Scorch and Stress Relaxation Testing

ASTM D1646 ISO 289 Digital Mooney Viscometer ±0.3°C Accuracy for Rubber Viscosity Scorch and Stress Relaxation Testing
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ASTM D1646 digital Mooney viscometer

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ISO 289 rubber viscosity tester

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digital Mooney viscometer for rubber testing
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Product Description

CF8558 Digital Mooney Viscometer — The Gold Standard for Rubber Viscosity Testing Since ASTM D1646

Mooney viscosity is the #1 QC parameter in the rubber industry. Your incoming raw rubber, mixed compounds, and final products all depend on consistent, accurate viscosity measurement. The CF8558 delivers lab-grade precision with ±0.3°C temperature control and 0.01 Mooney Unit resolution—because every tenth of a Mooney unit matters in your process.

🔥 What Sets the CF8558 Apart

✓ ±0.3°C Temperature Stability — PID-controlled die cavity ensures results you can replicate across shifts, operators, and labs.
✓ Both L & S Rotors Included — Large rotor for standard compounds, small rotor for high-viscosity materials. Switch in seconds.
✓ Three Test Modes in One — Mooney Viscosity (ML 1+4), Mooney Scorch (t5, t35), and Stress Relaxation. Complete rubber characterization.
✓ Real-Time Mooney Curve Display — Watch the viscosity profile develop on the 7-inch touch screen. Spot anomalies instantly.
✓ 0.01 MU Torque Resolution — Capture subtle viscosity differences that coarser instruments miss. Critical for high-spec compounds.
✓ Automatic Die Operation — Pneumatic die opening/closing with safety interlock. Operator-friendly and safe for 24/7 production labs.

🎯 Production Problems — Eliminated

  • "Today's compound batch feels different." → Quantitative Mooney value replaces subjective feel. 1-minute test gives definitive answer.
  • "We're getting scorch in the extruder." → Mooney scorch test at processing temperature predicts exactly when premature vulcanization will occur.
  • "Our supplier claims consistent quality." → Incoming Mooney viscosity test verifies every batch. Hold suppliers accountable with data.
  • "Our QC lab is the bottleneck." → One-button operation with automatic result calculation. Technician training in < 1 hour.

📊 Performance Specifications

Temperature RangeAmbient ~ 200°C, preheats to 100°C in ≤ 10 min
Temperature Accuracy±0.3°C with 0.01°C display resolution
Rotor Speed2 ± 0.02 rpm (ASTM/ISO standard)
Mooney Range0 ~ 200 Mooney Units
Test ModesViscosity (ML 1+4, 1+8, etc.) · Scorch (t5, t35) · Stress Relaxation
Die CavityClosed, serrated surface per ASTM D1646 spec
StandardsASTM D1646, ISO 289-1/2, GB/T 1232, GB/T 1233

🏭 Essential For

Tire compound mixing rooms · Technical rubber goods manufacturers · Natural rubber (TSR, SMR, SIR) processors · Synthetic rubber (SBR, NBR, EPDM, CR, IIR, BR) producers · Custom compounders · Rubber research institutes · Automotive supplier QC labs

📦 What's in the Box

CF8558 main unit · Large rotor (L, ø38.10mm) · Small rotor (S, ø30.48mm) · Rotor removal tool · Calibration reference compound · Thermal printer with paper · USB cable · Pneumatic fittings · English operation manual · Factory calibration certificate · 12-month warranty

💬 Top Customer Questions

Q: What's the difference between ML 1+4 and ML 1+8?
A: ML 1+4 = 1 min preheat + 4 min test (most common). ML 1+8 = 1 min preheat + 8 min test (used when longer shearing is needed). Both are pre-programmed.

Q: Can I test silicone rubber?
A: Yes, the CF8558 handles all rubber types from soft silicone (ML < 10) to stiff tire compounds (ML > 100).

Q: How often does it need calibration?
A: Annual calibration is recommended. We provide a reference compound for routine verification. Recalibration service available.

Q: What maintenance is required?
A: Clean die surfaces after each test, lubricate the rotor shaft monthly, and verify with reference compound weekly. Full maintenance guide included.

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