King Rich KRV-2000 Knee Mill CNC Conversion

New project to make a Mill Riser Block out of a piece of hydraulic cylinder 406 O.D. 340 I.D and 216mm long. It was bandsawn from a barrel 3.7m long that weighed 1300kg. This piece alone is around 75kg. A Mill riser block fits on top of the column and raises the turret 200mm to allow more clearance between the spindle and the table for larger jobs like boring a small engine or drilling with a long drill bit or tapping with a tapping head or working over a large rotary table or vise.
They can be purchased for a Bridgeport secondhand for a reasonable price but the King Rich is a bit larger and very expensive. Access to a piece of stock like this made the project viable to build one..

https://youtu.be/_y38RHNHwww

I needed to register the Riser Block to both the Column and the Turret.

https://youtu.be/NNfbUSOSuYQ

After sorting out a method of registering the riser block, the turret was lowered back into position and the head was trammed so I could continue machining.

https://youtu.be/h-DJVLUv5wg

The tram is good but the surface finish can be improved by changing the tool path exit and including a spring pass.

https://youtu.be/SeWc3oDBRhE

When I was happy with the surface finish on the first side, the riser block was flipped over and the rough sawn second side was machined flat.

https://youtu.be/Re7b5hzQDdU

Installation required the 70kg riser block to be transfered from the table to the column.

https://youtu.be/UMrL_qNgsz8

The 14 inch long 5/8 UNC hold down bolts had 15/16" AF hex heads. The original 6 inch bolts have 23mm AF heads which match the supplied ring spanners in the Mill Tool Kit.

https://youtu.be/8ullGndplkk