The shot peening is a cold working process in which the surface of a part is bombarded with small spherical media called shot. Each piece of shot striking the material acts as a tiny peening hammer, imparting to the surface a small indentation of dimple. In order for the dimple to be created, the surface fibers or the material must be yielded in tension. Below the surface, the fibers try to restore the surface to its original shape, thereby producing below the dimple, a hemisphere of cold-worked material highly stressed in compression. Overlapping dimples develop an even layer of metal in residual compressive stress. It is well known that cracks will not initiate or propagate in a compressively stressed zone since nearly all fatigue and stress corrosion failures originate at the surface of a part, compressive stresses induced by shot peening provide considerable increases in part life. The maximum compressive residual stress produced at or under the surface of a part, by shot peening is at least as great as half the yield strength of the being peened. Many materials will also increase in surface hardness due to the cold working effect of shot peening. 

Benefits obtained by shot peening are the result of the effect of the compressive stress and the cold working induced. Compressive stresses are beneficial in increasing resistance to fatigue failures, corrosion fatigue, stress corrosion cracking, hydrogen assisted cracking, fretting, galling and erosion caused by cavitation. Benefits obtained due to cold working include work hardening, intergranular corrosion resistance, surface texturing, closing of porosity and testing the bond of coatings. Both compressive stresses and cold working effects are used in the application of shot peening in forming metal parts. 

We make shot peening machines for various application specially designed for particular type of components. which are subjected to cyclic load hence prone to failure by fatigue in long usage. We can satisfy the technical specification to all standards like SAE JIS DIN etc. 

All conditions for Shot peening process in the component drawing will be fully met with and practically demonstrated at our works to the entire satisfaction of quality engineers. We also train people on site for operation and maintenance of machines. We design & supply suitable fixtures for Almen strip holders to simulate the practical working conditions of components we also supply accessories like Almen Gauge, Almen strips holder fixtures etc along with the machines. Some of our installations in India for different components. are shown in the photographs. 

In these machine the jobs get tumbled while blasting cleaning hence cleaning from all sides, breaking of all sharp edges is excellent. The loading/ unloading is very easy. However delicate thin walled jobs, or jobs with fins or machined components are not advisable to be blast cleaned in these type of machines. We make Presently two models, with Rubber Belt in this type. 

Tumblast - 20” x 27” 
Tumblast - 27” x 36” 

Both models are available with Auto Loader as extra optional

D) TUMBLING BARREL TYPE 

These machines are economical, occupies less floor space and suitable for small parts. 
Small foundries, and forging industries investment castings prefer this design. 
The Barrel size can be varied as per customer requirement .

These machine are universal type shot blasting machine wherein any variety of components can be loaded on the table either manually or with lifting mechanism. The shot firing being only from top side jobs are required to be turned to expose all sides to the shot flow. The jobs which otherwise can not be hang or tumbled and very heavy are most suitable for this type of machine. We make following standard table sizes Any other size can also be made on request. 

Glint- T- 30 With single /double /door table dia 30” 
Glint- T- 48 with single /double /door table dia 48” 
Glint- T- 72 with single / double /door table dia 72” 
Glint- T- 96 with single / double / door table dia 96” 
These swing can be increased in smaller models to suit some typical jobs which otherwise will need higher size machine. 

These machines are most suitable for small and medium size of jobs like Gears castings Forgings, Fabricated jobs etc. since the shots are impinged form top and bottom side and the hanger with components rotate about its own axis, the componets are cleaned from all sides at a time. The productivity of these machines is very high and it can be further enhanced by incorporating monorail type conveying system, so that components can be loaded and unloaded at exact destination points. We make 3 model in this design. 

GLINT- 350 Hanger size dia. 600 x 900 mm height. 
GLINT- 450 Hanger size dia. 1000 x 1500 mm Height. 
GLINT – 800 Hanger size dia. 1000 x 1500 mm Height. 

All machine are double door type with pit foundation or platform for ease of loading / unloading. Material handling system to suit heavy jobs can also be offered at extra optional. 

We can design and supply shot peening machine suitable for many application, which will enhance productivity ease of job handling less manpower requirement and for jobs which are otherwise difficult to blast clean in standard machines. 
These include.

•  Plate and section cleaning machine. 
•  LPG / Gas Cylinder. 
•  Brake shoes. 
•  Pipes / Bars. 
•  Strip /wire descaling machine. Being in special purpose machine design & manufacture field we shall be pleased to offer our service for custom built machines for various applications. you can offer your designs or just ideas to put it into practical use.