RonamFlon RG+PTFE+INOX bearings (Type D)

RonamFlon RG+PTFE+INOX bearings (Type D)

These bearings are made by vulcanizing a layer of rubber (or rubber reinforced with a sheet of steel), to a smooth or molded layer of PTFE, then an AISI 304 stainless steel is applied over the top of the bearing.

They are available in various shapes (circular, square or rectangular), and in thicknesses and dimensions that clients require.

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

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