RG/DISC bearings
RG/DISC bearings
RG/DISC-SERIES DISC-SHAPED PTFE STEEL SUPPORT EQUIPMENT SEALED IN RUBBER
This type of support equipment consists of a steel plinth that forms the seating for a rubber disc held in place by a steel component. Rotation occurs through deformation of the rubber disc while translation occurs through the connection of two flat panels (PTFE - STAINLESS STEEL).
| Rubber properties | M.U. | Requirements | Test methodology |
|---|---|---|---|
| Hardness | IRHD | 60 | ISO 4894 |
| Hardness range | IRHD | ± 3 | ISO 4894 |
| Resistance at break | MPa | ≥ 16,00 | ISO 37/94 |
| Elongation at break | % | ≥ 425 | ISO 37/94 |
| 25% Compression set 24h 70° | % | ≤ 30 | ISO 815/914 |
| Tear resistance | N/mm | ≥ 8 | ISO 34-1/04 |
| After 7 days at 70°C ageing in air thermostat | ISO 188/98 | ||
| Hardness variation | IRDN | -5/+10 | |
| Resistance at break variation | % | ± 15 | |
| Elongation at break variation | % | ± 25 | |
| Ozone resistance (25 p.p.c.m. 30% 96 h 40°C) | No cracks at sight | ISO 1431-1/04 | |
| Fragility limit variation | °C | ≤ 40 | ISO 812/91 |
| Rubber-metal attack | N/mm | ≥ 7 | ISO 813/97 |
| G modulus | MPa | 0,90 | E 1337-3/05 |
| PTFE G400 properties | M.U. | Requirements | ASTM test methodology |
| Specific weight | G/cm³ | 2,14 - 2,18 | D792 |
| Hardness | Shore D | 51 – 60 | D2240 |
| Tensile strenght | N/mm² | > 20 | D4745 |
| Elongation at break | % | > 200 | D4745 |
| Compression resistance with 1 % deformation | N/mm² | 4 - 5 | D695 |
| Under load deformation at ambient temperature after 24 hours at 13,7 N/mm² | % | 14 – 17 | D621 |
| Permanent deformation as above and after 24 hours of rest | % | 7 – 8 | D621 |
| Dynamic friction coefficient | 0,06 | D1894 | |
| Exercise temperature (min – max) | °C | -200 / +200 | |
| Expansion linear thermic coefficient 25 – 100 °C | 10 / °C | 12 – 13 | D696 |
| INOX STEEL AISI 304 L mechanics properties at 20°C | Requirements | ||
| Brinell Hardness | 130 ± 150 | ||
| Load at break | 500 ± 680 | ||
| Removal U load | 175 ± 300 | ||
| Minimum resistance | 160 |
