Bright steel

In order to achieve optimum bright steel microscopic surface structure and concentricity, we at Geissler generally rely on the system of rough-turning. Round bright steel manufactured by drawing is primarily used in the manufacture of mass components and wherever clean surfaces and dimensional tolerance in accordance with the values of the DIN/EN standards are of importance. Surface flaws such as pores and minor cracks invariably arising during the rolling process are not remedied by the drawing process and must be tolerated to the extent described in the DIN/EN standard.

Rough-turning reliably corrects these surface flaws. The microscopic surface structure and concentricity correspond with the requirements for manufacturing piston rods or even as a pre-stage for grinding to the closest tolerances. Depending on the dimensions, between 0.2 and 10 mm are processed in each rough-turning operation. This is followed by straight-polishing where the surface is smoothened and the requisite straightness achieved. On request, an additional surface grind—which we refer to as “rough-grinding”—can be performed for larger formats in the processing line. This is possible for dimensions of up to 240 mm, round.

If closer tolerances than ISO 9 are required, this is possible in the form of additional centreless grinding. We guarantee tolerances of up to ISO 6 for dimensions ranging from 20 to 160 mm, round.

Suitable technical equipment permits us to perform end-processing such as centring, planning, chamfering to specific degree requirements or drawings. We supply many components ready for installation.

Quality and dimensional accuracy enjoy maximum priority in our business. We avail of all of the requisite equipment in our own laboratory for material analyses, breaking and microscopic tests. The documentation associated with each work process includes basic information on the melting analysis applied for raw materials permitting each individual rod to be traced to the steelworks where it was manufactured.

Dimensional controls are performed permanently during the production process. The measuring results are saved and remain available for several years. Laser-guided dimensional controls automatically correct wear displayed by processing tools. But even the very best automatic measuring process is no substitute for controls via micrometer—our man on the machine only believes what he sees!

On request, we can supply our customers with all DIN products, while the requisite acceptance procedures demanded by recognised acceptance agencies are performed and certified in our own factory.