Anayak HVM-5000 Horizontal Boring Mill
Covers have been removed where you can see the X-Axis, Y-Axis, and Z-Axis ball screws on an Anayak HVM-5000 horizontal boring mill. This beast was tucked away in the back of the factory, forgotten. The owners decided they wanted to put it back in production. They quoted the age-old maxim in heavy steel machining: They do not make machines like they used to. This machine was fabricated in Spain. Not sure of the status of this company, but apparently Anayak USA has a physical address in Calabasas, CA. This machine uses Ipiranga brand ball screws and ball nuts.
Pulling the bolts to the X-Axis ball screw ball nut flange. Anayak HVM-5000 horizontal boring mill. Notice one of the four slideways the machine tower slides up. Look at the discoloration of the slideway surface. This machine spent some time without adequate lubrication on these precision machined surfaces. If you ever are thinking about purchasing a monster horizontal boring mill like this one, be prepared to add the cost of slideway refurbishment to your budget. That is if you want to utilize the accuracy this machine system is capable of. We can rebuild the ball screws. But that is only one portion of correcting looseness to return quality machine axis accuracy. Over the decades, Ballscrew Guys have worked on raising CNC machinery from the dead necromancy projects. Story is the same. A machine was bought super cheap at an auction, or sold simply as scrap value. It is possible to bring many of these machines back into production. But if you choose this CNC machine path, you must factor the total costs required to resurrect them.
The X-Axis Ipiranaga ball screw found in an Anayak HVM-5000 horizontal boring mill. This axis moves the machine head tower parallel to a work table. The ball nut is internally routed, so removal of the ball nut from the ball screw shaft is mandatory. No other way around it. You can see it is machine center style split nut ball nut. Here two ball nut halves come together on either side of a spacer shim. It is critical that the spacer shim and ball bearing diameter match in proper proportion. It is the only proper way you can return preload back to the ball screw assembly. There are some other ways to tighten it up, like simply adding spacer shim material. But this just accelerates the wear and destruction going on in the ball nut.
Completely pulling the X-Axis Ipiranga ball screw from an Anayak HV-5000 horizontal boring mill. Here we had to completely disassemble and remove the drive servo motor and drive box. Then remove the motor side and outboard end bearing housing assemblies. These were heavy. Most required the use of an overhead crane, as you can see one of our technicians doing in the image. Once again, these issues like material handling need to be factored in if you are requiring X-Axis ball screw service to your monster machine center.
The Ipiranga ball nut halves off the X-Axis ball screw. This was a split nut or double nut style ball screw assembly. Two ball nut halves are spaced apart by a spacer shim. The spacer shim and ball bearing diameters must match in proper proportion. It is the only proper way you can return preload back to the ball screw assembly. This was taken from Anayak HVM-5000 horizontal boring mill.