Metrology Division - Cast Iron Products: Cast Iron Products are manufactured at our well equipped 30,000 sq. ft. foundry located at SIPCOT, Hosur. A machine shop and laboratory spread over a 10,000 sq. ft. area are also available at this facility. The Cast Iron products are made of close grain Cast Iron with hardness from 190 to 210 BHN. Two grades (finish) available: Grade I - Hand Scraped; and Grade II - Machined.

GMT is one of the leading manufacturers and suppliers of cast iron surface plates and tables.

CI SURFACE PLATE – The plates are ribbed to minimize deflection under load to conform to deflection limits as per IS2285:1963 standard. Grade 1 plates are artificially seasoned. Accuracies as per IS2285:1963 Standard

GMT Cast iron Surface plates are the products of years of manufacturing experience.

These plates are of close-grained cast iron.They are amply ribbed to minimize deflection under load.The composition of the metal,the depth and cross-section of the ribs and the thickness of the plate are designed to conform to the deflection limits specified in IS-2285-1991.

GMT Surface plates are manufactured to three Grades namely Grade 0,Grade-I & Grade-II,as per the standard stated above.

Grade"0" & Grade-I plates are artificially seasoned.They are hand scraped to achieve maximum local deviation from flatness as per standard at any point on the working surface.A special scrapping technique is used to achieve a uniform distribution of load bearing point and oil pockets.An average of 15-20 load bearing points after finish scraping is standard.This finished scraping technique ensures that the area of the load bearing points increases after the initial dulling of the high points.This guarantees a long working life,at the required accuracies.Grade-II plates are accurately machined to get the requisite flatness.

STANDARD ACCESSORIES:

Plates of size 1000 x 630 mm and smaller,are provided with handle. A wooden cover is provided to protect the working surfaces.

OPTIONAL ACCESSORIES:

Fabricated heavy angle iron stands,with required leveling screws,are offered for  all plates to provide convenient working height.

Cast iron column floor stands each with a leveling screw and nut are also offered as an option as under.

• A set of five,three for leveling and two for support  for    2000 x 1000mm plate.
• A set of seven, five for leveling and two for support ,for  3000 x 1000mm & 3000 x 1200mm.

 plate, with fabricated heavy angle iron stands.Bed Plates with special cast iron floor stands.

ANGLE PLATE – The plates are well ribbed to minimize distortion. Suitable number of T-Slots are provided on surface. Divided clamping holes are provided on other working face. Accuracy as per IS2554:1971 Standard.

GMT Angle plates are made of high duty close-grained cast iron to IS:210 Grade 20.They are well ribbed to minimize distortion and are artificially seasoned as recommended in IS:2554:1971.

GMT Cast Iron Angle plates conform to IS:2554:1971 and are offered in two grades,Grade-I and Grade-II.They are manufactured in different sizes to meet a wide range of requirements.

Grade-I plates are very carefully hand scraped on all working surfaces to accuracies conforming to Grade-I limits as per IS:2554:1971.

Grade-II Plates are finish machined on all the working surfaces to accuracies conforming to Grade-II limits as per IS:2554:1971.

Plates sizes 1 to 5 provided with suitable number of T-Slots on one work face.

Divided clamping holes are provided on the other working surface.T-Slots dimensions conform to IS:2013:1962.Sizes 6 and 7 are provide with elongated slots on both the working faces to facilitate clamping.

To meet special requirements,we offer precision matched angle blocks suitable to provide a convenient means for mounting and clamping work for boring and milling operations. 

• They are made from heavy section castings.
• The working surfaces are hand scraped.
• The LBH dimensions are maintained to close tolerances.
• T-Slots are provided on the working surfaces to facilitate clamping. 

BOX ANGLE PLATE – T-Slots are provided on working surface. T-Slot dimensions as per IS2013:1962 Standard. Accuracy as per IS6232:1971 Standard.

GMT Cast Iron Box Angle Plates conform to IS 6232:1971 and are offered in two grades, Grade-I and Grade-II.They are manufactured in different sizes to meet a wide range of requirements.

GMT Box Angle Plates are made of heavy duty close grained cast iron IS 210,Grade 20 and hardness is guaranteed to be above 180-BHN.They are artificially seasoned as recommended in IS 6232:1971.

To meet varied job requirements,the plates are offered  in two grades,Grade-I and Grade-II.

Grade-I plates are very carefully hand scraped on all the working surfaces to accuracies conforming to Grade-I limits as per IS 6232:1971.

Grade-II plates are finish machined on all working surfaces to accuracies conforming to Grade-II limits as per IS 6232:1971.

GMT Box Angle Plates are provided with suitable number of T-slots on working surfaces to facilitate clamping.T-slot dimensions conform to IS 2013:1962.

Matched pairs:Matched Pairs  Angle Plates can be supplied at extra cost.The tolerance on dimension L,B & H between the two matched units will be,

• Matched Pairs Grade-10.03mm.
• Matched Pairs Grade-110.08mm.

STRAIGHT EDGE – I- Section straight edges are designed for maximum stability. Weight is optimized.

A Straight Edge is a Machine Tool Accessory,essentially used in reconditioning shops and for certain specific applications in tool rooms.

GMT Cast Iron I section Straight Edges are manufactured in different sizes to meet a wide range of applications.I section straight edges are designed to give maximum stability with minimum weight.Adequate number of holes are provided for sizes 80 x 80 x 500 mm.,100 x 100 x 1000mm. and 70 x 200 x 1500mm.to reduce weight of the straight edge.The straight edges are made of close-grained cast iron,conforming to IS 210 grade 20 and are artificially seasoned.

GMT Straight Edges are hand scraped on the two working surfaces as well as on the edges to very close accuracies.

A wooden cover to protect the working surface and the side is supplied for sizes:

1.  80  x   80    x     500 mm.
2. 100  x  100  x    1000 mm.
3.  70  x   200  x    1500 mm. 
   

Sizes 25 x 40 x 300 mm and 30 x 60 x 500 mm are supplied with a box made of wood so that the straight edges can be preserved ,free from damage when not in use.

GMT  also manufactures the following: 

1. Camel back Straight Edge.
2. Angular Straight Edge.  

BENCH CENTRE – The base is made of close grained Cast Iron, heavily ribbed and stress relieved. The checking centres consist of head stock and tail stock. Head stock spindle is made up of Nickel-Chromium Steel, case hardened and ground. Centres are made up of tool steel and ground.

Cast Iron Products

Cast Iron Surface PlateCast Iron Angle Plate
Cast Iron Box Angle Plate
Cast Iron Straight Edge
Cast Iron Bench Centre