IS 3375 : 1991 Household sewing machines - Bobbin case - Specification_

1 Scope

This standard covers the requirements for bobbin case forvertical oscillating shuttles for sewing machines for householdpurposes.

2 References

IS 1501 : Part 1 :1984Method for Vickers hardness test formetallic materials:Part 1 HV 5 to HV 100

IS 1570 : Part 2 : Sec 2 :1987 Schedule for wrought steel:Part 2 Carbon steels (unalloyed steels),Section 2 Carbon steel wires withrelated properties

IS 1720 :1978Cotton sewing threads

IS 2102 : Part 1 :1980General tolerances for dimensions andform and position :Part 1 General tolerances for linear andangular dimensions

IS 2500 : Part 1 :1973 Sampling inspection tables :Part 1 Inspection by attributes and bycount of defects

IS 4454 : Part 1 :1981Steel wires for cold formed springs :Part 1 Patented and cold drawn steelwires unalloyed

IS 4905 :1968Methods for random sampling