South Eastern Coalfields Limited-SECL has published Procurement Of Drill Bit ( Stone ) Size 27 Mm. Submission Date for this Tender is 10-07-2020. Drilling Bits Tenders in BHATGAON Chhattisgarh. Bidders can get complete Tender details and download the document.
Name of Tender/Work: Procurement of drill Bit (Stone) size 27 mm dia. | |||||
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Sl. No. | Item Description | Item Code / Make | Quantity | Units | |
1 | 0 | ITEM DESCRIPTION | |||
2 | 1 | Drill Bit (Stone):27 mm nominal dia, with centre hole of 6mm dia.\nTechnical Parameters:\nA. The rotary Drill Bit shall be required for use in Under Ground Coal Mines for drilling holes for resin capsule roof bolting.\nB. Type of Bit: “A” (One piece bit, Biwing)\nC. Nominal diameter: 27 mm.\nD. Suitable for 22 mm Hexagonal Drill Rod with hole\nE. Bit body should have a hole at Centre & shall allow an unrestricted flow of cuttings away from the Bit\nF. Attachment to the rod shall be streamlined.\nG. Tip shall be firmly brazed to the body of the Bit.\nH. Brazing alloy as per IS:2927-1975\nI. Central hole: 6 mm. Dia.(throughout)\nJ. Threaded length : 18 mm, M16 suitable to fix in drill rods\nK. Shank & Body: High tensile steel 0.55% Carbon ( Minimum)\nL. Hardness : 210 HV (Min.) for bit body\nM. Tip: Tungsten Carbide H grade.\nN. Conforming to IS: 4005-1967\nO. Hardness: 1450 to 1550 HV\nP. Composition: 7% to 8% Cobalt\nQ. Predominating grain size: 1 to 3 um\nR. Free from porosity, Eta-phase, Pitting\nS. Marking on each Bit:\nT. Manufacturer’s name / trademark\nU. Letter ‘H’ for Hardness type\nV. Nominal Size: 27 mm\nW. Weight of drill bit…………. 100 gms.\n | item1 | 2200 | Nos |
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