Business
Sintered components
Valve seat insert
What are the valve seat inserts functioning?
NPR -Riken valve seats insert, featuring world-class wear resistance and compatibility with multiple fuels, support internal combustion engines worldwide.
The "Valve seat insert", which is press-fitted into valve seating face part with cylinder head, is made of sintered alloy. This is important parts, which require durability that there is no deterioration by hitting at high temperature and which require high gas tightness that combustion gas is sealed certainly. NPR-Riken has offered the superior valve seat insert which meets high level of requirements of engines, making use of abundant material variation and material development power.
Required Items and Corresponding Tecnologies
P/M camshaft
What are the P/M camshafts functioning?
Contributing to engines with surface high-pressure resistance, high strength, and lightweight design P/M camshaft
The P/M camshaft, boasting many features such as light weight, high contact pressure resistance, and narrow cam spacing, is a unique, patented product available only from NPR-Riken.It is manufactured by sintering the alloy steel cam lobes onto a steel tube. Journal parts are made by diffusion bonding sintered materials into one piece, bonding steel materials with copper brazing, or using a part of tube as a journal, processes that are customizable to meet the individual design specifications of the engines.
We cater to diverse valve system needs.
material to strengthen bearing
What are the material to strengthen bearing functioning?
During aluminum die casting, it can be directly set into the mold and cast.
Component parts to strengthen aluminum body (material to strengthen bearing)
To provide a sintered alloy having excellent strength and damping performance
For reinforcement purposes
・Thermal Expansion Control
・Strengthening Measures
・Noise and Vibration Countermeasures
