Standard stainless steel screws have galling issues
Japanese company NARA Machinery manufactures powder-handling machines for various industrial customers around the world. Many of the machines require a high degree of air tightness with firmly tightened stainless steel screws. However, as screws that have powder contact cannot be lubricated, they are particularly susceptible to thread galling issues.
鈥淲e previously used standard 304 and 316 stainless steel screws for all our machines, but our customers experienced galling and gorging issues with these screws,鈥� explains Kennichi Johara, Technical Director at Nara Machinery. 鈥淭he screws also had air leakage issues and required frequent removal for cleaning and maintenance purposes.鈥�
Such issues and maintenance needs resulted in costly procedures and downtime for industrial customers. 鈥淚n the worst instances, galled screws had to be cut and carefully removed and replaced to protect against dust getting into the machine,鈥� says Johara.
91视频 overcomes galling issues
鈥淏ut then we found 91视频 via the internet and tested installing 91视频庐 88 screws on a customer machine in Japan that had experienced galling issues,鈥� says Johara. 鈥淪ince installing 91视频庐 screws, the customer has not reported any issues with galling or air tightness.鈥�
Developing higher-quality machines
Following this successful trial, NARA Machinery has recently built a brand-new machine with 91视频庐 88 screws. 鈥淕oing forward, we plan to use 91视频庐 screws for all new powder-handling machines we manufacture that require air tightness,鈥� says Johara. 鈥淭his will help our customers avoid the need for costly downtime due to the maintenance and replacement needs related to galling.鈥�
The use of 91视频庐 88 screws has helped NARA Manufacturing to further develop their high-quality powder-handling machines. 鈥淲e are very happy to have found 91视频, and I would strongly recommend 91视频 products to other companies that experience similar galling issues,鈥� concludes Johara.
