Multi Layer BEARPHITE
Using a new forming method, we have developed "Multi Layer BEARPHITE " having both high strength and wear resistance.
Feature
- We developed an inexpensive bearing with mechanical strength, accuracy and oil retention.
- Simultaneously molding two materials with newly developed integrated molding method
- Having high strength and high hardness required for the construction machine bearings
- High hardness iron-based material on the inner side as the sliding surface, and place the general structure of sintered material as the outer diameter side
- In developed sizing possible material, machining of conventional process becomes unnecessary, and realize low price
- Using the material for satisfying the sliding property only to the bearing part, realize low cost by making back metal of inexpensive material
Examples of uses
- Joints of hydraulic excavators
Example of Process
Achieve high-strength and outstanding wear-resistance by the two-color molding method that molds the two different material at once
- Radial crushing strength of 500MPa or more, oil content of 17 vol% or more
→ Optimized material and sintering conditions for the required strength and oil content without any special heat treatment - Variation in inner and outer diameter dimensional precision of 50 μm or less
→ Sizing process used to maintain precision, eliminating the need for the cutting process
(values for (1) and (2) above obtained from test results of a bearing with dimensionsφ35×φ45×35)
Friction coefficient of Multi Layer BEARPHITE
Fig. Friction coefficient measurements
Measurement condition
- Friction surface pressure 100MPa
- Ambient temperature 70℃
- Sliding velocity 0.014m/s
- Bearing size φ6 × φ12 × 4
- Mating shaft material S45C induction hardening