Vertical Impact Rebound Tester | ASTM D2632 Standard (KR-132)
RT-134 Rubber Rebound Elasticity Tester
Product Details：
Product Overview
Core Product Strengths
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Low-friction Vertical Guide Structure
Precision polished stainless steel guide rod eliminates lateral offset during plunger falling; the plunger moves vertically with minimal contact friction, ensuring consistent impact force for every test and greatly improving data repeatability.
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Integrated Stable Cast Base with Level Calibration
Thickened black cast iron base equipped with four fine-tuning leveling knobs and built-in bubble level gauge. Users can quickly calibrate horizontal state before testing to avoid tilt-induced test deviation. Heavy base effectively absorbs impact vibration without shifting during continuous batch testing.
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Clear Calibrated Height Scale
Custom engraved full-range vertical ruler marked with clear millimeter scale, covering complete rebound observation range. Operators can directly read bounce height without auxiliary measuring tools, lowering human reading error.
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Standard Matching Impact Plunger & Fixed Drop Height
Comes with standard 28g test plunger, fixed 400mm drop height fully complying with ASTM D2632 dimensional requirements; matched sample positioning base ensures impact point stays 14mm away from specimen edge as specified in the standard.
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Compact All-Mechanical Design, Low Maintenance
No motor, electrical circuit or hydraulic components, completely free of power supply restriction. Only regular light lubrication for guide rods is needed, suitable for small test stations, field sampling inspection and budget-limited labs. Small footprint saves valuable bench space.
Specification:
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Drop height:
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400mm
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Falling weight:
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28g
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Test thickness:
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12.5mm
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Test Dimension:
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〉30mm
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Volume(W*D*H):
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250*150*520.5mm
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Weight:
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9kg
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Standard Test Operation Steps
- Horizontal Calibration: Place the tester on a flat rigid table, adjust four bottom knobs until the bubble level sits at center position.
- Specimen Preparation: Cut samples to standard 12.5mm thickness and condition them under standard temperature & humidity environment as required by ASTM D2632.
- Sample Positioning: Put the test piece on the base platform, align the plunger impact point 14mm away from any edge of the specimen.
- Pre-impact Stabilization: Lift the plunger to the 400mm fixed position and release freely; repeat impact three times to stabilize the rubber surface, discard these three groups of data.
- Formal Data Recording: Perform impact for 3 more consecutive times, record rebound height reading for the 4th, 5th and 6th bounce, then calculate average value as final resilience index.
- Test Completion: Remove specimen, wipe guide rod and base to store the instrument.
Applicable Test Materials & Scenarios
- Vulcanized rubber: natural rubber, SBR, NBR, EPDM, silicone rubber, rubber sole materials, shock-absorbing rubber pads
- Flexible polymer sheets: TPE, TPU soft elastomer sheets
- Testing purposes: raw material incoming QC, new rubber formula screening, finished product elasticity inspection, dynamic energy loss research, compliance testing against ASTM D2632
Comply Standard: ASTM D2632
Supporting Standard Accessories
- Standard 28g alloy impact plunger
- Bubble level gauge integrated on base
- Complete set of positioning base for 12.5mm specimens
- Operation manual with ASTM D2632 test procedure
- Storage protective dust cover (optional)
Global Sales & Technical Support
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