Cometech Series G Grips | Compression Platens, Self-Aligning & Spring Platens | GR-G010 to GR-G060 | 500N–20kN | Can, Brittle Material, Spring, Foam & Concrete
- Series G grips are compression platens and specialized compression fixtures for axial load testing of cans, brittle materials, springs, foam, and concrete — 14 models across 5 families: standard compression (GR-G010/G01A/G01B/G01C/G01D), self-aligning (GR-G02B/G020/G02C), self-aligning concrete platens (GR-G03C/G03D), spring platens (GR-G040/G04A/G04B), and return-to-zero jig (GR-G050).
- Capacity range: 500N–20kN; max. platen diameter: Ø50–Ø150mm; temperature range: −70 to +200°C (model dependent); min. load cell: 50N–500N.
- Suitable for compression testing of cans, brittle and rigid materials, springs, foam pads, concrete cylinders, and return-to-zero calibration.
- Compatible with Cometech universal testing machines as standard compression fixtures.
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Overview
Cometech Series G compression platens provide flat, self-aligning, and spring-loaded contact surfaces for axial compression testing of materials and components that cannot be tested with standard tensile grips — including metal cans, brittle ceramic and plastic blocks, springs, foam pads, and concrete cylinders.
The five families address distinct test requirements: the GR-G01 standard platens cover the widest capacity range (10–20kN) in four diameter sizes for general rigid material compression; the GR-G02 self-aligning platens allow automatic angular correction under eccentric loading; GR-G03 self-aligning platens are optimized for concrete cylinder compression; GR-G04 spring platens apply a constant preload for spring and foam testing; and GR-G050 is a return-to-zero calibration jig for zero-setting the test machine before compression tests.
Temperature ratings extend down to −70°C (GR-G01 and GR-G02 families) for cryogenic compression testing, with upper limits of 100–200°C depending on model.
Grip Models & Specifications
GR-G010 Compression Platens
Suitable for can and brittle material compression testing.
| Model | GR-G010 |
|---|---|
| Type | Compression Platens |
| Capacity | 10 kN |
| Max. diameter | Ø50 mm |
| Min. load cell | 50 N |
| Temperature limits | −70 to +200°C |
| Weight | 400 g |
GR-G01A Compression Platens
Suitable for can and brittle material compression testing.
| Model | GR-G01A |
|---|---|
| Type | Compression Platens |
| Capacity | 20 kN |
| Max. diameter | Ø130 mm |
| Min. load cell | 200 N |
| Temperature limits | −70 to +200°C |
| Weight | 1825 g |
GR-G01B Compression Platens
Suitable for can and brittle material compression testing.
| Model | GR-G01B |
|---|---|
| Type | Compression Platens |
| Capacity | 20 kN |
| Max. diameter | Ø75 mm |
| Min. load cell | 100 N |
| Temperature limits | −70 to +200°C |
| Weight | 717 g |
GR-G01C Compression Platens
Suitable for can and brittle material compression testing.
| Model | GR-G01C |
|---|---|
| Type | Compression Platens |
| Capacity | 20 kN |
| Max. diameter | Ø100 mm |
| Min. load cell | 200 N |
| Temperature limits | −70 to +200°C |
| Weight | 1182 g |
GR-G01D Compression Platens
Suitable for can and brittle material compression testing.
| Model | GR-G01D |
|---|---|
| Type | Compression Platens |
| Capacity | 20 kN |
| Max. diameter | Ø150 mm |
| Min. load cell | 500 N |
| Temperature limits | −70 to +200°C |
| Weight | 2403 g |
GR-G020 Self-Aligning Compression Platen
Suitable for spring and foam compression testing.
| Model | GR-G020 |
|---|---|
| Type | Self-Aligning Compression Platen |
| Capacity | 5 kN |
| Max. diameter | Ø50 mm |
| Min. load cell | 500 N |
| Temperature limits | −70 to +100°C |
| Weight | 1096 g |
GR-G02B Self-Aligning Compression Platen
Suitable for spring and foam compression testing.
| Model | GR-G02B |
|---|---|
| Type | Self-Aligning Compression Platen |
| Capacity | 5 kN |
| Max. diameter | Ø75 mm |
| Min. load cell | 500 N |
| Temperature limits | −70 to +200°C |
| Weight | 1772 g |
GR-G02C Self-Aligning Compression Platen
Suitable for spring and foam compression testing.
| Model | GR-G02C |
|---|---|
| Type | Self-Aligning Compression Platen |
| Capacity | 10 kN |
| Max. diameter | Ø100 mm |
| Min. load cell | — |
| Temperature limits | −70 to +200°C |
| Weight | 2685 g |
GR-G03C Self-Aligning Compressed Platen
Suitable for concrete cylinder compression testing.
| Model | GR-G03C |
|---|---|
| Type | Self-Aligning Compressed Platen |
| Capacity | 20 kN |
| Max. diameter | Ø100 mm |
| Min. load cell | 500 N |
| Temperature limits | −10 to +200°C |
| Weight | 3269 g |
GR-G03D Self-Aligning Compressed Platen
Suitable for concrete cylinder compression testing.
| Model | GR-G03D |
|---|---|
| Type | Self-Aligning Compressed Platen |
| Capacity | 20 kN |
| Max. diameter | Ø150 mm |
| Min. load cell | 500 N |
| Temperature limits | −10 to +100°C |
| Weight | 3269 g |
GR-G040 Spring Platen
Suitable for spring and foam compression testing.
| Model | GR-G040 |
|---|---|
| Type | Spring Platen |
| Capacity | 500 N |
| Max. diameter | Ø50 mm |
| Min. load cell | — |
| Temperature limits | −10 to +200°C |
| Weight | 1060 g |
GR-G04A Spring Platen
Suitable for small spring compression testing.
| Model | GR-G04A |
|---|---|
| Type | Spring Platen |
| Capacity | 500 N |
| Max. diameter | Ø50 mm |
| Min. load cell | — |
| Temperature limits | −10 to +200°C |
| Weight | 1060 g |
GR-G04B Spring Platen
Suitable for small spring compression testing.
GR-G060 Compression PlatensSuitable for spring and foam compression testing.
Quick Comparison
| Model | Type | Capacity | Max. Diameter | Min. Load Cell | Temp. Range | Weight | Best For |
|---|---|---|---|---|---|---|---|
| GR-G010 | Compression Platen | 10kN | Ø50mm | 50N | −70~+200°C | 400g | Can, brittle material |
| GR-G01A | Compression Platen | 20kN | Ø130mm | 200N | −70~+200°C | 1825g | Can, brittle material |
| GR-G01B | Compression Platen | 20kN | Ø75mm | 100N | −70~+200°C | 717g | Can, brittle material |
| GR-G01C | Compression Platen | 20kN | Ø100mm | 200N | −70~+200°C | 1182g | Can, brittle material |
| GR-G01D | Compression Platen | 20kN | Ø150mm | 500N | −70~+200°C | 2403g | Can, brittle material |
| GR-G020 | Self-Aligning Platen | 5kN | Ø50mm | 500N | −70~+100°C | 1096g | Spring, foam |
| GR-G02B | Self-Aligning Platen | 5kN | Ø75mm | 500N | −70~+200°C | 1772g | Spring, foam |
| GR-G02C | Self-Aligning Platen | 10kN | Ø100mm | — | −70~+200°C | 2685g | Spring, foam |
| GR-G03C | Self-Aligning Platen | 20kN | Ø100mm | 500N | −10~+200°C | 3269g | Concrete |
| GR-G03D | Self-Aligning Platen | 20kN | Ø150mm | 500N | −10~+100°C | 3269g | Concrete |
| GR-G040 | Spring Platen | 500N | Ø50mm | — | −10~+200°C | 1060g | Spring, foam |
| GR-G04A | Spring Platen | 500N | Ø50mm | — | −10~+200°C | 1060g | Small spring |
| GR-G04B | Spring Platen | 5kN | Ø75mm | — | 0~+100°C | 4466g | Small spring |
| GR-G060 | Compression Platen | 5kN | Ø130mm (use Ø100mm) | — | −10~+100°C | 4435.5g | Spring, foam |