South Eastern Coalfields Limited

South Eastern Coalfields Limited has published Supply Of Hexagonal Drill Rods Size 22Mm X 1800Mm With 6Mm Central Hole And With Water Manifold , Hexagonal Drill Rods Size 22Mm X 1800Mm With 6Mm Central Hole And With Water Manifold . Technical Specification:- Scope :- A ) Use Of Drill Rod : In Coal Mines . B ) The Rods Shall Be Manufactured From Solid Hexagonal Type Section . C ) Material: - The Drill Rods Shall Be Manufactured From High Tensile Steel Special Steel Of Grade 55 Simncrnimo With Surface Hardness 50-55 Hrc . D ) The Length Of Drill Rod As Measured Excluding Water Manifold & Shank For Drill Chuck Shall Be 1800Mm . E ) Diameter Of Hexagonal Rods Shall Be 22Mm With Central Hole Of 6Mm . F ) Diameter Of Shank Shall Be 19Mm & Length 70Mm . G ) Accommodation Of Drill Bit:- M-16 Thread Shall Be Provided At The End To Accommodate 27Mm Diameter Drill Bits With Threaded End . H ) Adopter Of 39 . 7Mm Diameter X 22Mm Long Shall Be Provided For Holding The Rod In Drill Chuck Of 25Mm Square X 22Mm Long Adapter . I ) Drill Rods Shall Be Suitably Electroplated To Provide A Surface Hardness Of 65-86 Hrc . J ) Hexagonal Drill Rods For Resin Capsule Bolting Shall Be Supplied With Water Manifold As Below:- I ) Water Manifolds Shall Be Made From High Grade Seamless Tubes . Ii ) Water Pressure Of Water Outlet From Drill Rods Shall Be Minimum Of 30 Kg/M2 . Iii ) High Quality Bearings And Oil Seals Shall Be Provided In The Manifold So That There Shall Not Be Any Water Leakage From Water Manifold During Drilling Operation . K ) Each Rod Shall Be Marked On The Shank With The Diameter Of The Rod And Manufacturers Name , Make/Trade Mark . . Last date of submission for this tender is 2021-01-14. This is a Drilling And Exploration Equipment tender in Baikunthpur, Chhattisgarh