MR-5 Self-Lubricated Bearings

<< MR-5 Sliding Bearings Family

MR-5 Technymon self-lubricated flange bearing with high conductive sliding layer

MR-5 Technymon self-lubricated flange bearing with high conductive sliding layer preview — MR-5 Flange E version

MR-5 Technymo Ball self-lubricated bearing — MR-5 Ball E version

MR-5 Technymo Flange Dimples self-lubricated bearing — MR-5 Flange D version

The MR-5 trademark identifies a range of bearings composed material of compounded polytetrafluoroethylene tape on a supporting shell of low-carbon steel. The tape of PTFE contains carbon and graphite, that give at the material self lubricating, isolates noise and is designed for obtain self lubricated bearings without play.

The MR-5 bearing series comes in two versions:

Version E: with a high surface conductivity PTFE sliding layer
Version D: with a non-conductive PTFE sliding layer

MR-5 bearings are characterized by the use of low-carbon steel (DC04) as the supporting shell.

The available products are cylindrical and flanged bearings, washers, belts and cast-to-size parts with thickness standard is from 0,500 / 0,750 and 1,000 mm.

Operating Conditions

DRY Very Good
OIL Good
GREASE Good
WATER Fair
PROCESS
FLUID Fair

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composite layers of MR-5 bearing preview — composite layers of MR-5 bearing

Structure of the composite material

Layer	Average analyses of the material	Thickness of layer
Sliding layer	PTFE Modified	0,150 ÷ 0,170 mm
Supporting shell	DC 04 (EN 10139) Cu = 0,060 Max Mn = 0,15 ÷ 0,32 P = 0,025 Max S = 0,030 Max Al = 0,028 ÷ 0,070	0,250 ÷ 0,750 mm (Depending on final thickness required)
Protective layer	Sn or Zn (as per customer requirement)	> 1 μm

Characteristics

Thick sliding layer with uniformly distributed solid lubricants
Good calibration/sizing assembly (zero-clearance)
High surface conductivity with E version PTFE, not-conductive D version PTFE available with notches/dimples, to prevent paint bridge issues, 1Ω volume conductance can be achieved with proper surface contact
With right fit, uniform torque can be achieved at the required value
Thick PTFE layer helps in edge loading

Technical Data

Maximum Specific Load Static	60-200 N/mm² (8700-29000 psi)
Maximum Specific Load Dynamic	45-120 N/mm² (6540-17400 psi)
Service Temperature Minimum	-200°C (-328°F)
Service Temperature Maximum	+180°C (+356°F)
Service Temperature Intermittent	+260°C (+500°F)
Maximum Speed Dry	1.5 m/s (300 fpm)
Coefficient of Friction Dry	0.06 - 0.3
Maximum Dry Load Factor Continuous	1.8 N/mm² · m/s
Surface Resistivity E version PTFE	~10⁵Ω
Surface Resistivity D version PTFE	~10¹⁴Ω

#Structure of the composite material #Characteristics #Technical Data