Important information:
We would like to inform you that the business operations of Klein Maschinenbau GmbH u. Co. KG will be completely transferred to our previous sister company, Henninger GmbH u. Co. KG, as of 01.07.2025.
As part of this takeover, the entire product range will be seamlessly taken over and continued in the usual quality and with the usual range of services. The aim of this measure is to ensure long-term competitiveness by pooling resources and making targeted savings, and to continue to offer you the best possible solutions in the future.
From 01.07.2025 we ask you to address all inquiries, orders or feedback directly to Henninger GmbH u. Co. KG. Below you will find the complete contact details:
Henninger GmbH u. Co. KG
Humboldtstr. 20
75334 Straubenhardt
Germany
+49 (0) 7082 9241 0
info@henningerkg.de
www.henningerkg.de
We would like to thank you for the trust you have placed in Klein Maschinenbau GmbH u. Co. KG and look forward to continuing to serve you as a valued customer under the umbrella of Henninger GmbH u. Co. KG.
If you have any questions, please do not hesitate to contact us at any time.
Yours sincerely
The management
Klein Center Grinding Machines
Why centre grinding?
because a high roundness error in the centre means that the position of the workpiece on the dead centre is not defined during machining. This is reflected in at least four effects:
- The workpiece spins on the centre within its roundness error. The roundness error is thus reflected on the outside diameter / runout.
- The ratio between permissible tolerance and diffusion increases. Hence the process capability and reproducibility decreases.
- For the next quality assurance, measurement is made at a different position in the centre between centres, the position is most likely not the same as in the cylindrical grinding process.
- Thin-walled parts can be deformed if the contact pressure of the centres in the centre is high. In this case, the roundness error of the centre is reproduced on the outside. If cylindrical grinding is then performed, the part is only round initially. If the centres are then moved out of the workpiece, the part relaxes and the non-circular-roundness reappears in the centre.