Tue, 2 Mar 2021
22.7 C

New spindle bearings for high speed, high precision machine tools

Home Manufacturing & Processing Automotive New spindle bearings for high speed, high precision machine tools

NSK presented its new Robustride cylindrical roller bearings for the spindle drives of high speed, high precision machine tools at the recent EMO Hannover Fair, a global event for machine tools and metalworking.

According to the company, these advanced bearings feature an optimised cage that facilitates more even lubricant distribution, which in turn reduces bearing wear, especially under high loads.

Also launched at the show were NSK´s Robust angular contact ball bearings with improved accuracy class. The spindle bearings of machine tools must meet very high requirements for running accuracy.

The company has developed various bearing types and series for this demanding application which are known as the Robust series. The series is now supplemented by the Robustride single-row cylindrical roller bearings. Robustride bearings offer a specially devised cage with geometry and guidance that have been improved specifically for this application profile.

NSK´s optimisation work included developing a way to better distribute the lubricant and, subsequently, create less and more uniform heat generation within the bearing. The lubricant flow in the bearing is directed in such a way that the inside (which is rather disadvantaged by centrifugal forces) is also supplied with lubricant in the optimum way.

“Any resulting surface losses are negligible and, even at the extraordinarily high speeds commonplace in many of today´s machining operations, very good lubricant distribution is achieved,” the company said in a statement.

“These design improvements serve to minimise bearing wear, especially at high loads. They also shorten the running-in period of the bearing grease. Another advantage is that Robustride bearings allow significantly greater tolerances in the bearing clearance due to optimised guidance of the rolling elements, which simplifies mounting procedures.”

In addition, NSK has developed new cages for its series of Robust angular contact ball bearings.

Most Popular

Eazi does it: opening access equipment doors in the mining industry

WORK-at-height and material-handling equipment supplier, Eazi Access has added a second Hi-Capacity JLG Model, the JLG 800 HC3 AJ, to its fleet. The company is...

CASE STUDY: Safe and efficient maintenance with a scalable and adaptable Lockout/Tagout implementation

Ontex, a leading international personal hygiene group, wanted to achieve a high level of safety and efficiency for machine maintenance interventions. Read how Brady...

Fuel prices head for record highs

SOARING international oil prices have set the stage for yet another hefty hike in fuel prices. That’s the warning from the Automobile Association (AA),...

R500m roads upgrade for Buffalo City

THE South African National Roads Agency (SANRAL) is to pump an estimated R500 million into a road infrastructure project in the Buffalo City Metropolitan...