BS 4656 is a Bristish standard that discusses the accuracy of machine tools and methods of tests. BS 4656-18 is the eighteenth part of the multi-part series that outlines the geometrical tests for broaching machines, and the horizontal internal type and gives corresponding permissible deviations that apply.
BS 4656-18 applies to machines of general-purpose use and normal accuracy. BS 4656-18 deals only with the verification of the accuracy of the machine.
Note: BS 4656-18 does not apply to the testing of the running of the machine (vibrations, abnormal noises, the stick-slip motion of components, etc.) nor to its characteristics (speeds, feeds, etc.) which should generally be checked before testing accuracy.
BS 4656-18 on the specification for broaching machines, horizontal internal type is useful for:
Broaching machine is a tool for finishing by drawing or pushing a cutter called a broach entirely over the past of the surface. A broach has a series of cutting teeth arranged in a row, graduated in height from the teeth that cut first to those that cut last.
BS 4656-18 guides you with the proper application of geometrical tests for broaching machines of horizontal internal type to evaluate the accuracy of broaching machines.
With obedience and compliance to BS 4656-18, you can properly evaluate the performance of broaching machines and ensure proper verification of the machine.