Toolholding company Gewefa in the UK has developed a parts kit for use in machine tool maintenance and servicing.
With the support of specialist monitoring equipment from its partner Ott-Jakob and Gewefa's components from its toolholding inventory, the kit focuses on monitoring and servicing of the spindle and machine turret of machining equipment.
Precision and repeatable accuracy on machining and turning centres is essential, which places the performance of key machine tool components as priority and naturally its routine maintenance schedules are indispensable, especially that of the spindle and machine turret.
Degradation of internal components such as spindle bearings and the spindle pull-back mechanism has an impact over time on the precision of the workpiece being machined, much in the same way as tool wear. As such, spindle performance monitoring is vital, which the operator monitors as a regular routine check or it is undertaken by third party servicing experts.
Gewefa's test equipment combines the Ott-Jakob Power Check (a spindle-pull force measuring gauge) and high-precision Gewefa test bars and alignment kits to monitor spindle performance and its servicing. All of which is now a straight-forward, precision-guaranteed operation with the kit, Gewefa notes.
An adaptable component, Power Check can be used as a portable service tool or for, larger machine shops, permanently located (as a toolholder) in the carousel to supply on-going data regarding the condition of the spindle.
The connection to the handheld data collector is wireless so the operator can monitor data collected at the machine on a maximum of eight different machine locations. Over 8,000 readings can be stored on the handset, which can be easily downloaded to a USB stick for transfer to a laptop or a network computer system.
The company offers an extensive range of test bars covering sizes in DIN, HSK, VDI or BT spindle formats. In the monitoring process, they are used to check the spindle run out and they are available with a flange or in plain format. All Gewefa test bars come with test certificates and are precision-ground for both precise surface finish and concentricity.
The third component is the “ATC”’ alignment kit used to accurately align the tool-change arm to the spindle. Comprising four elements – taper/flange/shaft and bush – the components are supplied in a bespoke tool case for safe storage and transportation.