In our Spindeldoctor practice, we come across many kinds of defective spindles. From experience, we know that in nearly all cases the problem is the cone.
But why do customers let themselves be sold a completely new shaft when only a small part is defective? Why do customers wait up to six months when it is also possible in seven days? Why do customers pay a high price when they could also save money?
With our shaft rescue system, we start at the weak point of your spindle. Permanent operation, constant changing of the tools, collisions between tool interface and workpiece or the tool turning in the interface have a detrimental effect on the cone.
Huge costs are incurred in replacing the entire spindle. Are you well insured? Then the insurance premium at least will increase and the Controlling department at your company will not be best pleased either.
We perform “open-heart surgery” and put the cone of a spindle back into operation. Your spindle will be restored to health in just seven days and will be as “good as new”. The great thing about it: You save 60 percent of the costs!
Put simply, the cone connects your spindle to the respective tool. No other part of a spindle is subject to such intense use; no other part breaks so quickly.
“Quack doctors” try it with chrome coating. Not a good idea! The geometry of the interface is changed as a result of the rough grinding. In addition, the clamping taper and the inner contour of the shaft are usually ignored. Ultimately, the nitrated lower layers have to be removed during chrome or welding repair.
As the Spindeldoctor, we warn against chrome or welding repair. This can lead to functional defects in the Tensioning system, clamp and sensory system. In addition, material flaking as a result of a frequent change in tools is to be expected.
When you bring your spindle to our practice as part of the shaft rescue system, we take a look at the cone. In the first step, the component is fully turned and is given special treatment immediately.
Full turning is followed by insertion of the cone bushing using nitrogen, and alignment. We repair the spindle shaft through internal grinding. We measure the shaft cone during the entire grinding process. After assembly, the cone is measured once again in the prism with a pin gauge. The result is impressive: the cone complies with the DIN 69781 standard again in its entirety.
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