Introduction

The present material contains 4 selected instruction examples which are intended to help practising and consolidating knowledge and skills acquired in the working technique reaming. The existence of a drilled hole is a pre-condition for reaming.

For the sake of completeness, the technological sequence for the present instruction examples also includes the steps for producing the hole.

In order to facilitate the preparation and execution of the work, the necessary materials, cutting and operating tools, measuring and testing tools and accessories are stated for each instruction example.

For the instruction examples 3 and 4 the steel is specified according to the value of its tensile strength in the unit “Megapascal” (MPa).

We also recommend knowledge required in addition to knowledge of reaming which should be repeated before starting with the work. Explanations to the working drawings are given before the specification of the technological sequence.

The specified sequence of operations for the individual training examples gives the steps necessary for the production of the parts. This sequence of operations should be strictly observed if good quality is to be achieved.

For each instruction example a working drawing is attached showing the required shapes and dimensions of the workpiece. It is also possible to select other parts with greater or smaller dimensional variations.

The admissible deviations for sizes with no indication of tolerances may be taken from the table below.