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Cometech QC-640 Impact Specimen Angle Cutting Device | V-Notcher for Izod & Charpy Specimens
- Impact specimen V‑notcher used to cut standard V‑shaped notches on plastic impact test specimens.
- Supports notch geometries for Izod and Charpy tests according to ASTM D256, ASTM D6110, ISO 179, ISO 180, ISO 148 and related standards.
- Adjustable cutting speed (approx. 30–700 m/min) with 5–99 step dial setting to match different materials and standards.
- Handles specimens 3–13 mm thick, up to 14 cm length, with ISO 8.0 ±0.2 mm and ASTM 10.16 ±0.05 mm notch depths.
- Produces more stable, accurate impact test results by generating consistent, standard-compliant notches.
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Overview
The Cometech QC-640 Impact Specimen Angle Cutting Device (impact specimen V‑notcher) is designed to cut standard V‑shaped notches on plastic impact test specimens.
By preparing specimens with precise notch geometry according to Izod and Charpy standards, the tester helps make subsequent pendulum impact tests more stable and accurate.
Users can choose different cutter types and adjust notch depth and cutting speed to suit specific standards and specimen requirements.
Technical Specifications
Standards & methods
| Primary standards | ASTM D256, ASTM D6110, ASTM E23, ISO 179, ISO 180, ISO 148, ISO 13802, EN 10045‑1 (used for Izod/Charpy impact specimens). |
|---|---|
| Test purpose | Cut V‑shaped notches for Izod and Charpy impact testing of plastic specimens. |
| Industry | Plastic. |
Specimen & notch capacity
| Specimen thickness | 3–13 mm. |
|---|---|
| Cutting height (notch region) | 10–13 mm. |
| Maximum specimen length | 14 cm. |
| ISO notch depth | 8.0 ±0.2 mm. |
| ASTM notch depth | 10.16 ±0.05 mm. |
Cutting speed & control
| Speed range | Approx. 30–700 m/min (adjustable). |
|---|---|
| Speed setting | Finger‑flicking switch / dial with 5–99 adjustable speed segments (multi‑segment reference). |
Key features & options
- Machine is used to impact/drive the cutter through the specimen to form a standard V‑notch, improving stability and accuracy of impact test results.
- Notch type and depth depend on different standards; users can select various cutter types to match ISO or ASTM geometry.
- Adjustable cutting speed helps reduce the effect of cutting on the specimen, especially for more brittle plastics.
- Often used together with Cometech pendulum impact testers (e.g., QC‑639 series) as the dedicated notch‑preparation device.
Documents & Downloads
- If you obtain the official Cometech QC‑640A / QC‑640 brochure PDF, you can link it here for customers to download detailed notch and setup information.