Precision shafts for your linear technology

Precision guide shafts are centreless ground and are subject to particularly strict quality requirements with regard to straightness, diameter tolerance, concentricity, hardness, surface quality and surface roughness. According to the technical requirements, G&G Antriebstechnik GmbH offers solid shafts made of hardened heat-treated steel (1.1213/Cf53) either h6 precision ground or h7 hard chrome-plated.

Cf53 is particularly suitable as a material for precision shafts. The hardening process applied ensures a uniform hardness profile and high wear resistance in the surface area, both axially and radially. Inductively hardened Cf53 reaches a surface hardness of min. 59 HRC to max. 66 HRC. The steel is hardened in the area of the surface layer, which leads to improved fatigue strength, particularly in case of alternating bending. The surface hardness depth is the depth at which 80% of the surface hardness is still available as limit hardness. The heat-treated steel used for production has good machining properties, resulting in low tool wear. The soft shaft core offers ideal conditions for machining the shaft ends.

The use of hard chrome-plated precision steel shafts is particularly recommended for applications where corrosion resistance is required in addition to high wear resistance. Hard chrome-plated shafts made from Cf53 have a chrome layer thickness of 12 μm +/5. The hardness of the chrome layer is at least 800 HV.

Hardened stainless steel precision shafts are primarily used in the food industry or medical technology. They have a lower surface hardness and therefore a lower load-bearing capacity than shafts made from hardened heat-treated steel. This is particularly important when using linear ball bearings on stainless steel shafts.

G&G precision shafts are manufactured in lengths of 6 m and cut to fixed lengths of 1000 mm, 2000 mm and 3000 mm for our bearings. The shafts are available in Cf53 and hard chrome-plated Cf53 as standard. On request, G&G also offers guide shafts in the material versions 1.4034 (X46Cr13) and 1.4112 (X90CrMoV18) or complete custom-made products based on drawings and/or samples. Even in a quantity of ONE.

Subsequent machining operations, such as cutting to length, chamfering, keyway, transverse slot, groove / retaining ring groove, axial & radial bores, hexagon socket, flattening / width across flats and studs are also included in the range. If the precision shafts are used as guide shafts for linear ball bearings, the end faces must be chamfered. This is necessary to prevent damage to the ball set and/or the sealing rings when the linear ball bearings are pushed on.