Self Lubricating Bushes with solid Lubricants

Applications : 

*   Where labor - Saving by Non - lubrication is required :-  Lathes, milling machines, saws, grinders, transfer machines, machining centers, drills and other industrial machines.

* Where Squeak Prevention or Smooth Operation is Desired :- Brakes, steering suspensions, clutches and transmissions, all for automobiles, forklifts and motorcycles; automatic doors for train coaches and department stores; car doors and conveyors.

* Where Starting and Stopping for Reciprocating motion, Rocking and Revolutions are performed frequently :- Robots, table lifters, generators, planters, mowers, sprayers, combined agrimotors, rice polishers, thrashers, manure feeders, bulldozers.

* Where Prevention of Oil pollution or Contamination is Required :- Sewing machines, textile machines, food processing machines, cleaning machines, printing machines, autometic packers, automatic fillers, meat choppers, leather working machine, automatic sorters.

* Where Lubricating is Difficult or Impossible :- Fans, automatic vending machines, drainage pumps, computer peripherals, terminal equipment, copiers, recorders, projectors, washing machines, knitting machines.

FEATURE 
*  Maintenance-free.
*  Excellent wear resistance in such places where an oil film is difficult to be formed due to reciprocating.     Oscillating motions and frequently intermittent operations.
*  Remarkable Resistance To Corrosion And Resistance To Chemical Attack.
*  Exhibits In Comparable Performance Under A High Load, Low Speed Operation.
*  No Imparity Through Discharge Of Lubrication.

LUBRICANT
To obtain the best possible lubrication the solid lubricant should be arranged in an overlapping pattern in slide direction. The amount of solid lubricant in proportion to the sliding area is between 25 to 35% of the total sliding area. Graphite with additive is use as a solid lubricant. For extreme application, sliding speeds >0.2m/s, additional lubrication is recommended.

INSTALLATION AND ASSMBLY
For optimum performance it is important that bearings are installed into their housings with and interference fit. This is best achieved by shrink fitting (freeze fitting) to prevent damage of the bearing outside or housing bore. All bearings are supplied with lead in chamfers unless otherwise specified when ordering.

SHRINK FITTING (freeze fitting)
Shrink fitting ensures the surface roughness of the bearing and its housing are maintained to provide an excellent mechanical keybetween the components. The theoretical interference and the precalculated close-down of the inner diameter of the bearing are
maintained.
Recommended interference fit :   - With normal load (less than 20N/mm2 ) : H7/s6
                                             - With high load (more than 20N/mm2) : H7/s6
                                             - For diameters more than 120 mm: H7/s6
                                             - For diameters less than 120 mm: H7/s6
With the above interference fits the bearing bore will close down to approximately H8 after installation from an initial bore diameter tolerance of E8. The shaft diameter will depend on the operating conditions but is usually e7 or g7.
The most efficient and economical method of shrink fitting is supercooling with dry ice (CO2) or liquid nitrogen. The bearing temperature should not fall below -50℃. With bearing diameters less than 30mm, additional pressure must be applied since the supercooling shrinking (calculated at -50℃) is less than the interference fit. When using dry ice as the cooling medium, approximately 60g of dry ice is needed per kg of bearing bronze per 10℃ supercooling providing the dry ice is packed around the bearing in an insulated container.

PRESS FITTING
Installation of bearings by press fitting should only be used for bearings that will support loads of less than 20N/mm2. 
Correct alignment under the press is essential to avoid damage to the bearing outside diameter or housing. For thin walled bearings press-in guide mandrel is also recommended.

MACHINED BUSHING
The Machined bushing is applied and produced for various material like steel and the high strength brass, specially it is suitable for some parts which need high-intensity, durability, abrasion resistance.
Also it displays the efficiency of optimum even from the condition where the foreign material.
Although foreign material is mixed, lubricating action keeps the efficiency of optimum from application equipment since the oil groove of various and beautiful structure has been produced.
Installation of bearings by press fitting should only be used for bearings that will support loads of less than 20N/mm2. 
Correct alignment under the press is essential to avoid damage to the bearing outside diameter or housing. For thin walled bearings press-in guide mandrel is also recommended.