Cap, Bronze Bearings | Iron bearings

SELFOIL Self-lubricated Sintered Bearings

Available formats: Type A Cylindrical, Type B with Walloon, Type C Spherical and Machining Bars.

Applications

The SELFOIL Self-lubricated Sintered Bearings® they are porous metal components of bronze or iron, impregnated with lubricating oil. The oil contained within the bearing constantly provides lubrication between the bearing and the shaft, thereby The system does not need additional lubricant.

 

SELFOIL Self-lubricated Sintered Bearings® that Broncesval SL sells are used in a wide range of applications, the most common being the following:

  • Electrical or mechanical equipment for cars: starter motors, windows, pedals, windshield wipers, fuel supply, cooling, EGR, brakes, transmission, mirrors, sunroof, seats, etc.
  • Appliances: washing machines, fans, extractors, shavers, epilators, blenders, grills, air conditioning, portable tools, coffee makers, blenders, vacuum cleaners, lawnmowers, boilers, etc.
  • Industrial: bottling machinery, woodworking machinery, anemometers, gardening, automatisms, key duplicators, sewing machines, industrial vehicles, electrical equipment.
  • Other markets: mobility, medicine, hospitality, agriculture, toys, etc.
  • Linear and rotary actuators, pneumatic, hydraulic and electromagnetic.
  • Home: locks, garage doors, shutters, sliding windows, swivel seats, luggage wheels, hinges, furniture.
  • Electric motors and gearboxes of medium or low power.
  • Other markets: mobility, medicine, hospitality, agriculture, toys, etc.

Recommendations for use

Keep SELFOIL® bearings in their original packaging until assembly.

 

  • Avoid putting the bearings in contact with absorbent materials (cardboard, paper, cloth, etc.).
  • Handle the bearings preventing them from hitting.
  • The reuse of disassembled bearings is strongly discouraged
  • Ask us if the bearing should work in contact with oxidizing liquids or gases.
  • SELFOIL® is a product designed for direct use. If it is strictly necessary to mechanize, please contact us to recommend it properly. Contact us by clicking here.

features

SELFOIL® SELFOIL® High performance
Bronze Iron Bronze Iron
Material Sintered bronze Ames-A4 @, type C-T8Z4-K140 according to UNE 96002: 2006 Sintered steel, type FOOC2-K200 according to ISO 5755: 2012 Sintered bronze Ames-A4 @, type C-T8Z4G-K120 according to UNE 96002: 2006 Sintered steel, type FOOC2-K200 according to ISO 5755: 2012
Oil Ames-01 paraffinic mineral with ISO VG 68 viscosity Ames-02 paraffinic mineral, with greater load capacity at high pressures or low speeds, and better start-stop behavior
Permissible load (MPa) Shaft Speed (m / s) Shaft Speed (m / s) Shaft Speed (m / s) Shaft Speed (m / s)
<0.25 or oscillating movement 0.25-0.50 0.50 - 5.00 <0.25 or oscillating movement 0.25-0.50 0.50 - 5.00 <0.25 or oscillating movement 0.25-0.50 0.50 - 5.00 <0.25 or oscillating movement 0.25-0.50 0.50 - 5.00
10 3,5 2,5 8 3 2 12 4 2,5 12 3,5 2
Operating Temperature (ºC) -20 to +120
Dimensional tolerances Tolerances according to ISO 2795 (see measurement tables)
Properties Typical Minimum Maximum Typical Minimum Maximum Typical Minimum Maximum Typical Minimum Maximum
Density (g / cm3) - 6,4 6,8 - 5,6 6,0 - 6,3 6,7 - 5,6 6,0
Oil content (%) - 19 - - 19 - - 19 - - 19 -
Total porosity (%) 22 - - 22 - - 22 - - 22 - -
Resistance to radial crushing (MPa) 170 140 - 200 160 - 150 120 - 200 160 -
Durability (HB) 35 - - 40 - - 30 - - 40 - - 

NOTE: SELFOIL® High Performance corresponds to bearings with an inner diameter greater than 30 mm.

Available forms

Bearing Type SELFOIL®

Utility

Mounting example

Available sizes

Type A Cylindrical

Suitable when the bearing works under radial load, without axial load or with very low axial load.

631 standard measures:
- Inner diameter from 2 mm to 100 mm
- Outside diameter from 5 mm to 120 mm
- Length from 2 mm to 120 mm

Type B Cylindrical with Walloon

Suitable when the bearing works under axial load, with or without radial load. The wall is used to absorb the axial load.

137 standard measures:
- Inner diameter from 3 mm to 60 mm
- Outside diameter from 6 mm to 70 mm
- Length from 4 mm to 60 mm

Spherical type C

Suitable when the bearing is running, or when the bearing must absorb shaft misalignments.

8 standard measures:
- Inner diameter from 4 mm to 12 mm
- Dial diameter from 10 mm to 23 mm
- Length from 8 mm to 16 mm

Type T hollow and solid bars

Suitable when the bearing size does not fit any of the standard sizes of SELFOIL bearings®. The bar must be machined to final measure, and reprinted

See previous examples

59 standard measures:
- Inner diameter from 0 mm to 150 mm
- Outside diameter from 15 mm to 202 mm
- Length from 25 mm to 140 mm

SELFOIL® bearing calculation

With the pressure and speed data, it is a matter of placing both parameters in the following abacus that we show in the image, and verifying that SELFOIL® is a valid option for your system.

 

This operation is explained in more detail in the following two examples:

Example 1

Calculation of the maximum permissible load of a SELFOIL bearing®

 

Data: A shaft-bearing system works at a shaft rotation speed of 800 rpm. What is the maximum load that a SELFOll-n bearing with an inner diameter of 20 mm and a length of 25 mm supports?

 

Solution: The shaft diameter is considered to be the same as the inner diameter of the bearing. In the abacus pressure / speed, we place the speed of 800 rpm and the shaft diameter of 20 mm. A maximum working pressure of 3.0 MPa is obtained. Then the projected area S? L? 20 mm 25 mm 500 mrn². Finally, since the pressure is P z F / S, transforming the formula, is the FPS 3.0 MPa load obtained? 500 mrry z 1,500 N. The maximum permissible load will therefore be 1,500 N (approximately 150 Kg).

Load / speed abacus for SELFOIL® bearings

Example 2

Calculation of the minimum length of a SELFOlL bearing®

 

Data: A shaft-bearing system works with a 20 mm diameter shaft that rotates at a speed of 600 rpm, and under a load of 1,500 N. What should be the minimum length of a SELFOIL bearing?® to work properly in these conditions?

 

Solution: In the abacus pressure / speed, we place the speed of 600 rpm and the diameter of the axis of 20 mm. A maximum working pressure of 4.0 MPa is obtained. Since the pressure is P = F / S, transforming the formula, the projected area S = F / P = 1,500 N / 4.0 MPa = 375 mm² is calculated. Considering that the diameter of the shaft is the same as the inner diameter of the bearing, the projected surface being S = Øint · L, the bearing length is calculated as L = S / Øint = 375 mm² / 20 mm = 18.75 mm. The minimum necessary length will therefore be 18.75 mm.

Formats

  • SELFOlL Bearing / Bronze Bearings® Type A Cylindrical
  • SELFOlL Bearing / Bronze Bearings® Type B with Walloon
  • SELFOlL Bearing / Bronze Bearings® Type C Spherical
  • Solid and hollow bars for machining Bronze bearing SELFOlL®
  • SELFOlL bearing bushings / bearings® Type A Cylindrical
  • SELFOlL Iron Bushings / Bearings® Type B with Walloon
  • Solid and hollow bars for machining SELFOlL iron bearing®

Specialized Technical Advice

We have specialized staff with extensive experience in the sector for any specific advice they need.

Get your quote or Contact us:
(+34) 961 340 776

Contact our specialists for more information.

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