Production Steps
The Powder Metallurgy 4-Step Process
From raw elemental powder to fully oil-impregnated precision bushes, every stage is controlled under ISO 9001 quality management protocols.
Forming
Elemental or alloy metal powders are mixed and pressed in precision dies within sophisticated presses, consolidating the mixture into a shape strong enough to handle prior to sintering.
Sintering
Formed compacts are transferred to a sintering furnace to metallurgically bind the particles under controlled atmosphere and temperature, producing the desired shape, porosity and strength.
Sizing
The sintered component is sized or coined to achieve very close final dimensions and high strength.
Oiling
Final components are impregnated with oil, especially for self-lubricating bearings.
Why Powder Metallurgy
Key Advantages of Our Process
Delivering structural strength, cost efficiency and self-lubricating properties unattainable through standard subtractive machining.
97%+ Material Utilisation
Powder metallurgy generates virtually zero chip waste compared to traditional machining, driving down material cost.
Controlled Porosity & Self-Lubrication
Engineered pore structures retain up to 18–25% oil by volume, eliminating external lubrication requirements.
Precision & Repeatability
High-accuracy compaction and coining deliver tight dimensional consistency across high-volume production runs.
Superior Surface Finish
Sintered components achieve smooth bearing surfaces without expensive grinding or polishing operations.
Complex Geometry in One Pass
Form complex internal features, flanges and splines directly during compacting without multi-axis machining.
Tailored Alloy Compositions
Custom elemental blending allows precise tuning of strength, hardness, conductivity and wear properties.
Raw material utilisation- one of the highest efficiency rates achievable in powder metallurgy
Years of powder metallurgy engineering expertise
Skilled workforce across production & quality control
Post-Sintering
Secondary Operations
Complementing our primary sintering line with comprehensive secondary finishing to satisfy exact OEM engineering drawings.
Heat Treatment
Thermal hardening and case hardening to achieve required surface hardness and wear resistance.
Precision Machining
Secondary CNC turning, grooving, facing and drilling where complex geometry requires post-sintering work.
Deburring & Barrelling
Vibratory finishing and centrifugal barrelling to remove sharp edges and refine surface finish.
Steam Treatment
High-temperature steam treatment forming a protective iron oxide (Fe3O4) layer for rust prevention and pressure tightness.
Surface Plating
Electroplating (zinc, nickel, copper) and anti-corrosion chemical passivation based on OEM specs.
Custom Sizing & Coining
Closed-die sizing press operations ensuring ultra-tight IT6 to IT8 dimensional tolerances.
Quality Assurance
In-House Quality Inspection Stages
Continuous testing from raw material receipt through final packaging to guarantee flawless physical and dimensional properties.
Raw Material Testing
Sieve analysis, flow rate, apparent density and green density testing on all incoming raw material.
Compacting Checks
Dimensional control of die dimensions, plus apparent and green density measurement during compacting.
Sintering Checks
Percentage growth and RCL (Radial Crushing Load) testing after sintering.
Oil Impregnation Checks
Density and porosity verification following oil impregnation.
Packing & Transport
Final-stage checks covering packing and transport quality ahead of dispatch.
Manufacturing Base
Facility & Production Infrastructure
Our fully integrated powder metallurgy facility at MIDC Hingna Industrial Estate, Nagpur, Maharashtra houses high-precision compacting presses, continuous mesh-belt sintering furnaces, sizing & coining machinery, vacuum oil impregnation chambers, and an in-house quality testing laboratory.
Compacting Presses
High-tonnage mechanical & hydraulic compacting presses for uniform green density.
Atmosphere Furnaces
Continuous mesh-belt sintering furnaces with multi-zone temperature & protective gas controls.
Vacuum Impregnation
Automated vacuum oil impregnation setup for self-lubricating bronze and iron bushes.
Testing Lab
RCL (Radial Crushing Load) tester, sieve shaker, green density meter, and optical comparators.