Ameera Exports

Rajkot, Gujarat

We manufacture the Valve guide from the size range of 1" to 24".We manufacture valve guide for almost all size of Engine. Valve Guides are grounded to a surface finish of 0.80 Micro Ra on its Outer Dia and with in a tolerance of 13 Microns. Valve Guides are also provided with Thread and Spiral in its Inner Dia to retain oil for long time. Thus increases the life of both Valve Guide and the Valve.

Ameera Exports manufacture Valve TappetLifters from Chilled Casting and Forgings of SAE 8620 Material as the requirement be. Tappets are manufactured on Special Purpose Machines Imported from Schufflers GMBH (GERMANY) which gives us the best result in terms of reliability and Dimensional Tolerance. We are giving the crowning on the wear face of the Tappet for 10 microns which is just a dream for our competitors who follow the crowning of 50 microns.

Intake and Exhaust Valves are offered from a wide range of materials, such as: EN24(BS817M40), EN52(BS401s45), 21-4N(BS349S52) etc., made by metal gathering upset forging process and Bimetallic Valves are Friction welded. Various process like Chrome flash on stem, Stellite on seat and tip area, Nitriding/Tuftriding, are also offered. Focusing briefly upon our production unit, we have a plant equipped with state-of-the-art machines with the latest and advanced CNC technology. We have our own forging plant giving us wide range of Valve manufactured from 4 to 20 mm stem dia and 25 to 250 mm head dia and up to 500 mm length. We have a Research & Development Department, process control and 100% inspection of each and every product we produce.

Ameera Exports manufactures Automobile Gears like Spur, Helical, Straight Bevel, Sprockets along with Transmission Spine Shafts, Couplings and Power Takeoff Clutches which are used for Transmission, Engine and Differential Gear Boxes. Computerization in every facet of operations is the key to our manufacturing success. The manufacturing process are: Turning on CNC turning centers, Gear cutting on Hobbling, Shaping & Bevel Generating machines, Gear Shaving, Broaching ( Horizontal & Vertical ), Tooth Rounding/Chamfering, Gear cleaning ( Shot blasting ), Milling & Grinding: Internal, External, Surface & Root with in process gauging system.

Heat Treatment Plant

Company is also equipped for Heat treatment process like: Gas Barbarizing, Induction Hardening, Salt bath HT, Nitriding, Annealing & Normalizing. We have a special department for manufacture of Jigs, fixtures Etc.

Measuring Enhancements

Our range of testing machines includes computerized Gear helix & profile tester and Gear roll tester with the graph recorder ( Both of David Brown make ), Helix measuring and hob testing machine, Material hardness testers ( BHN & HRC ) & other standard instruments.

The Rockers Arms are manufacture from Investment castings , Forging , Spheriodical Graphite Ductile Casting ( S G IRON CASTING ) , High 30 Graded Casting , Aluminum Forgings. The Bushing of the Rocker Arms are made from High Graded Brass.

Ameera Exports is the leading manufacturer of Rockers Arms for Most of the Automotive Applications. The Rockers Arms are manufacture from Investment castings , Forging , Spheriodical Graphite Ductile Casting ( S G IRON CASTING ) , High 30 Graded Casting , Aluminum Forgings. The Bushing of the Rocker Arms are made from High Graded Brass.

Push rods are made from various material Forged.Steel rod.Aluminum.Tubes. For competitors required to run mechanical fuel pumps. Push rods are inlaid at each end with the same diamond hard material used successfully for lifters. They will not wear the cam or the rod. Our push rods for lifting the valves are made of .080 wall molly steel and are swaged at both ends for a precision fit into the rocker and lifters.

Ameera Exports is the leading manufacturer of Cast Valve Seat Inserts. While studying Valve Seat Inserts technically and mechanically we understand the aspects of Service Life of inserts. Working closely with our customers it is our duty to suggest which type of alloys is to be used in manufacturing of Valve Seat Inserts so as to ensure the durability and cost effectiveness of the valve seat inserts. Ameera Exports, is equipped with full in house capability of Mixing of Alloys, Casting, Spectrometer for Evaluation of Material and Degree Machine to attain the maximum accuracy in the degree of the Valve Seat Inserts.

The Inspection and Quality maintenance program of Valve Seat Inserts

O.D. Roundness The roundness of the outside diameter should be held to 0.013mm maximum

O. D. to Bottom Face PerpendicularityThis specification should be held to 0.002mm per mm of width.

Seat Surface Gauge HeightThe gauge height tolerance for the seat surface is typically 0.04mm.

Seat Surface FinishA finish specification of 0.8 Ra is typical of many manufacturers.

Seat Surface Run-out to Bottom Face and O DRun-out of the seat to bottom face/O D is maintained to 0.04mm maximum.

Seat Surface AngleThe tolerance for seat surface angle is typically 0.25. The exact interference angle must also be used and not the nominal seat angle most near net shaped VSIs have.

Line Profile for Seat SurfaceSome manufacturers have a line profile (or roundness) specification for the seat surface. This specification is the most critical in ensuring a good seal between the valve and VSI. A typical specification for this feature is 0.02mm.

.

Some design considerations for the counter bore are as follows:

RoundnessA maximum counter bore roundness specification must be given. A typical specification is 0.013 mm. Any out-of-roundness on the counter bore can be transmitted to the valve seat surface.

Counter bore to Valve Guide PerpendicularityThe counter bore must be perpendicular with the valve guide. The specification of .002mm per mm should work well. These tolerances are intended as general guidelines. There are designs in existence that have tighter tolerance schemes and some with looser tolerance schemes.