Tools: Korradi UW1 Milling Machine (Update)

A quick update on the Korradi UW1 universal milling machine…

[toc]

Status

Due to our constant lack of time (also caused by all the other projects we have kicked of) the milling machine still rests on the pallet it got delivered on.

As soon as the lathe restoration has been successfully completed we will start working on the UW1.

Still to come…

  • welding a machine patform
  • cleaning
  • repairing the automatic feeds on X and Y axis
  • adding an emergency stop button
  • patch some leaks and change the spindle seals
  • change the oil and lube the machine

Tooling

Ebay classified turned out to be a good source for used tooling and tool holders.

  • Tool Holder OZ25
    The machine came with a full set of OZ25 collets. Now we can call three more tool holders our own which will result in less changing of tools.
  • Sandvik 63mm Milling head
    Considering the size of the machine a larger head should also work…
  • Assorted plain milling cutters
    Something you will just need from time to time… E.g. to cut slots for spindle blocks.

We also added a tool shelf for all the new SK40 tool holders. Unfortunately the shelf was made for DIN69871 tool holders which are optimized for automatic tool changers. Our DIN2080 tool holders can fall threw… we will need to fabricate an adapter plate.

Tool holders DIN2080

Our machine has two SK40 spindles (one vertical and one for horizontal milling) equipped with M16 pull rods. Although quite similar to DIN69871 which you can find on modern machines, the following differences make it hard to use them on the UW1

[table “” not found /]

Nevertheless with some small changes DIN69871 tool holders can also be used in older conventional machines.

  • Change the drive keys
  • Change the pull bold for a M16 thread
  • Shorten the pull rod a little

Left DIN2080, Right DIN69871.

Miscellaneous

Security

The machine currently has no emergency stop. We will add an E-stop and think about a variable safety shield.

T-nuts and T-slot covers

12mm slots on this size of machine theme a little small… Unfortunately this means that we cannot use certain industrial work-holding solutions nowadays found in industrial applications.

Cleaning small slots can also be annoying… Therefore we just bought a set of slot covers with drain holes from Wabeco. How they will stand up against lubricant and chips is still to be tested. We will keep you updated.

 

Power sockets

There are two power outlets for the machine light and other aux equipment on the right side of the machine. They were already damaged but got completely destroyed during a hoist operation.

I anyways wanted to replace the power outlets…

To cover the existing holes of the old sockets I designed a stainless steel sheet and got it laser cut. Very convenient process…

This was my first (and very pleasant) experience with Cutworks.de, an online laser cutting service. Despite having ordered standard deliver (up to 15 working days) my parts were in my hands within two days only.

A perfect fit! Maybe a bit short on the top… but not too bad.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.