PTEF Wrapped Bearings​

Product ID: 303430
Category: ,

Technical Information:

With low carbon steel as the backing, sintered bronze as medial layer,mixed PTFE with fibers as self- lubricating layer.
Suitable for dry running with low coefficient of friction, low wear rate,good sliding characteristics,the transfer film created will protect the mating metal Surface.

They offer good wear and low friction performance over a wide range of loads, speeds and temperatures in dry running conditions Suitable for linear, oscillating and rotating movements, Very good performance in lubricated applications and Good performance in greased applications

Application characteristics

  1. Suitable for oilless or few grease working conditions
  2.  Long maintenance-free
  3. Long operating life due to low friction
  4. low vibration, low noise and non-pollution in operation
  5. Thin wall thickness & low weight for the machine with compact design
  6. low hardness of mating shaft can be mated, so the shafts processing is easy
  7. Lower heat dissiption
  8.  lower absorption of water heat dissipation, and reduced swelling,to keep the exact sizes
  9. Cu or Tin plated in outer Surface, for good anit-corrosion

Technical Data:

Steel back + Porous Bronze Sinter + PTFE + Fillers Steel back + Porous Bronze Sinter + PTFE + Lead
Max.Loading Static 250 N/mm² 250 N/mm²
Low Speed 140 N/mm² 140 N/mm²
Rotating Oscillation 60 N/mm² 60 N/mm²
Max.PV limit Short Term Operation (Dry) 3.6 N/mm² . m/s 3.6 N/mm² . m/s
Continuous Operation (Dry) 1 N/mm² . m/s 1.8 N/mm² . m/s
Hydrodynamic 10.0 N/mm² × m/s 5.0 N/mm² × m/s
Temperature Range -195˚C~ + 280˚C -195˚C~ + 280˚C
Max.Speed V Dry Running 2.5 2.5
Hydrodynamic 2.5 2.5
Coefficient of friction Dry Running 0.04 – 0.25 0.02 – 0.25
Hydrodynamic 0.02 – 0.08 0.12 – 0.02
Thermal conductivity 42 42
Coefficient of thermal expansion 11×10-6 W(m.k)-1 11×10-6 W(m.k)-1
Shaft surface roughness, Ra Dry 0.3 – 0.5 µm   0.3 – 0.5 µm  
Lubricated

≤ 0.05 – 0.4 * µm

 ≤ 0.05 – 0.4 * µm
Shaft surface hardness Unhardened Acceptable, Improved Bearing Life

> 200HB

 > 200HB
Depending on operating conditions

Main Features:

Sliding ★★★★★
Abrasion Resistance ★★★★
Anti-bite Shaft ★★★★
Corrosion-resistant ★★★★
High loading ★★★
Environmental protection ★★

Operating Performance:

Dry ★★★★
Oil Lubricates ★★★★★
Grease Lubricated ★★★★
Water Lubricated ★★★