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Integral Proving Ring
The Proving Rings are made up of special steel, carefully forged to give maximum strength and machined to give high sensitivity commensurate with stability, ensuring long life and accuracy. All proving rings are integral type viz. the loading (outside) bosses are forged integral with the ring body. This ensures that there is no possibility of abutment shift and consequent loss of accuracy in reading that always exists with bolted abutments. Repeatability in these Proving Rings is as stipulated in IS:4169.The rings are supplied complete with dial gauge and Works Calibration Chart, individually packed in polished wooden boxes. National Physical Laboratory (NPL), (India)/ National Council for Cement & Building Material (NCCBM )Calibration can also be arranged for any proving ring at an additional cost. Proving rings to meet special requirements are also available on request.Separate polished and ground pair of Loading Pads for Compression Proving Rings and pair of Shackles for Tension Proving Rings are provided to suit each proving ring.