Cometech Series N Grips | Glass Compression & Ring Crush Grips | GR-N010 / GR-N01A / GR-N020 | 1kN–2kN | Glass Specimen Testing | TAPPI / Angle Bending & Flat Compression
- Series N grips are specialized glass testing fixtures for compression, ring crush, angle bending, and flat compression testing — 3 models: GR-N010 Glass Compression (1kN, 18×18mm), GR-N01A Ring Crush for Glass Bending (1kN, 55×55mm), and GR-N020 Ring Crush for Glass Compression (2kN, 400×200mm, TAPPI T826).
- GR-N010: 1kN, Ø9.5mm upper / Ø15.5mm lower ring crush, 100N min. load cell, 0–100°C, 2235g; GR-N01A: 1kN, Ø22.86mm upper / Ø52.07mm lower ring crush, 200N min. load cell, 0–100°C, 5420.5g; GR-N020: 2kN, 400×200mm jaw, 0.6mm thickness, 100N min. load cell, 0–100°C, 7202g.
- Upper and lower ring crush pin sets sized per specimen geometry for glass compression, bending, and angle bending tests; GR-N020 supports large-format flat glass compression (400×200mm platen).
- Compatible with Cometech universal testing machines; all N-series grips are rated 0–100°C for standard laboratory conditions.
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Overview
Cometech Series N grips are purpose-built glass testing fixtures that replace standard flat-jaw grips with ring crush pin geometry — concentrating the applied compressive load through precisely sized upper and lower ring pins to generate a standardized stress distribution across glass specimens without edge contact or lateral slip.
GR-N010 uses small-diameter rings (Ø9.5mm upper / Ø15.5mm lower) for standard glass compression tests on 18×18mm specimens, while GR-N01A scales up to Ø22.86mm / Ø52.07mm rings for a 55×55mm specimen area for glass bending tests per established ring-on-ring protocols.
GR-N020 shifts to a large 400×200mm flat platen design for glass angle bending and flat compression testing, accommodating very thin glass sheets (0.6mm) at up to 2kN — the highest capacity in the N series.
Grip Models & Specifications
GR-N010 Grip for Glass Compression
Applicable for glass specimen compression test.
| Model | GR-N010 |
|---|---|
| Type | Grip for Glass Compression |
| Capacity | 1 kN |
| Specimen thickness | 18 × 18 mm |
| Upper ring crush | Ø9.5 mm |
| Lower ring crush | Ø15.5 mm |
| Min. load cell | 100 N |
| Temperature limits | 0 to +100°C |
| Weight | 2235 g |
GR-N01A Ring Crush Grip for Glass Bending
Applicable for glass specimen bending test.
| Model | GR-N01A |
|---|---|
| Type | Ring Crush Grip for Glass Bending |
| Capacity | 1 kN |
| Specimen thickness | 55 × 55 mm |
| Upper ring crush | Ø22.86 mm |
| Lower ring crush | Ø52.07 mm |
| Min. load cell | 200 N |
| Temperature limits | 0 to +100°C |
| Weight | 5420.5 g |
GR-N020 Ring Crush Grip for Glass Compression
Applicable for glass angle bending and flat compression test.
| Model | GR-N020 |
|---|---|
| Type | Ring Crush Grip for Glass Compression |
| Capacity | 2 kN |
| Jaw face width | 400 × 200 mm |
| Specimen thickness | 0.6 mm |
| Min. load cell | 100 N |
| Temperature limits | 0 to +100°C |
| Weight | 7202 g |
Quick Comparison
| Model | Type | Capacity | Specimen Area | Upper Ring | Lower Ring | Min. Load Cell | Temp. Range | Weight |
|---|---|---|---|---|---|---|---|---|
| GR-N010 | Glass Compression | 1kN | 18×18mm | Ø9.5mm | Ø15.5mm | 100N | 0~+100°C | 2235g |
| GR-N01A | Ring Crush — Glass Bending | 1kN | 55×55mm | Ø22.86mm | Ø52.07mm | 200N | 0~+100°C | 5420.5g |
| GR-N020 | Ring Crush — Glass Compression | 2kN | 400×200mm platen | — | — | 100N | 0~+100°C | 7202g |