Process & Quality


The Process The process consists of the following :
  • Design Facility : Latest computer aided design facility with 2D and 3D simulations are utilized for the designing of tooling elements. We design all tooling required to produce a part to customer specifications. Our computer aided design system ensures efficiency and accuracy. Our engineering expertises are standing by to answer queries regarding your powder metal requirements.
  • Mixing : Mixing consists of blending of various powders, like iron powder, Copper powder, Tin powder, Carbon, Speciality lubricants & chemicals etc into a uniform non-segregating powder mix. We can blend material to customer specifications. Often a pre-blend is available to reduce cost. We use a wide variety of materials. These include iron, steel, copper steel, low alloy steel, copper infiltrated steel, copper, brass, bronze and other speciality alloys. There are also other materials that are available that can be blended to your specifications.
  • Pressing : Our mechanical and hydraulic press equipment can make a wide range of part sizes and shapes. We currently produce bushings and bearings, Sintered Rings, Inserts etc. Our presses have a range upto 500 T enabling us to efficiently produce small, medium and large size parts. We have adopted the best possible toll design, tool rigs and tooling system for the production at higher densities.
  • Sizing : We have heavy duty lathe machines for close tolerance sizing of materials. By the use of Hard Metal tool elements in most cases we have established a highly productive and economical sizing practice.
  • Oil Impregnation : In-house facilities are provided for impregnating parts with oil and carrying out steam treatment as and when required.
Secondary Operations :
  • Machining Operations like drilling, tapping, groove cutting, grinding is done in house. We have involved Speciality jigs and fixtures for the above.
  • Finishing operations include dry & wet barreling, deburring and burnishing operations.
Oilite/Sintered Bush Lubricantion :
  • Standard Oilite bush are impregnated with a highly refined mineral oil to ISO VG (SAE 30) having a high viscosity index and containing anti-oxidant, anti-rust and defoamant additives.
  • Any particular application thought to be outside standard conditions should be referred to our Technical Department.
However, here are some basic rules :
  • Low viscosity oil for low temperatures, high speeds or light loads
  • High viscosity oil for high temperatures, low speeds or heavy loads
  • High viscosity index oil for wide variations in operating temperatures
  • Oxidation stable oils for long-period usage
  • Oil with 'oiliness' additives for boundary conditions
  • Oil of lesser 'oiliness' for full film (hydrodynamic) conditions
  • Oil with Extreme Pressure (E.P.) additives for very heavy or shock loads
Machined Oilite bushes and washers are supplied fully impregnated after machining. A wide range of lubricants are available to meet specific requirements within a temperature range of -60°C to 200°C, lubricant additives are also available to impart anti-wear properties in marginal lubrication conditions. Special additives are also available for use with various shaft materials and finishes. Please contact our technical department for advice on specific applications. Oilite/Sintered Bush Fitting :
  • Before fitting make sure that all sharp edges are removed from the housing and mating shaft. The bush must be free from grit and dust.
  • Always use a fitting pin and steady pressure to insert the bush. Never use hammer blows. Shafts should ideally be hardened to approximately HRC 60 and ground to a surface roughness of Ra = 0.25 m.
  • Note : In extreme circumstances a combination of tolerances can make insertion of the fitting pin difficult. For advice on the recommended course of action in such cases contact our Technical Department.
Oilite/Sintered Bush Storage : Oilite bush can be stored for considerable periods without deterioration or loss of oil if kept in a metal or other non-absorbent container, at room temperature. Proximity to heat could cause oil loss by sweating, in which case reoiling is necessary before fitting. Wash in oil if storage conditions are in doubt.