1982 Ikeda 1175, 13" column, 4 foot arm, no 5 MT. Rare in the sense that the head looks nearly pristine, with original paint....everything works beautifully, ways on arm look like new. And the column looks nearly new as well...with the arm lowered all the way. But then raise up the arm on the column.... and a few inches up some multiple scoring lines start to be revealed about 1/2" wide total, and continue all the way until the arm it at the top. In other words the top half of the the column is pristine 360 degrees but the lower half has that fairly deep multiple scoring marks about 1/2" total width. Position of scoring is at 90 degrees (assuming you are on a ladder at front of machine looking down on top of column and the back of machine column is 0 degrees)
I seriously doubt this effects the actual function or accuracy of the drill at all...but still wondering how the hell it happened ? (and if it might still be happening every time I raise it...doesn't seem too) One is tempted to imagine some sort of hydraulic brake in the arm that has gone amuck pushing against the column too much.
But that's not how the rotation is braked...the rotation is braked via hydraulics wedging the column in position....the arm does not ever rotate on the column and is kept in position by a deep keyway at the rear of the column.
All I can figure is maybe previous owners were drilling something long enough that it scraped against the column while they raised the arm up and they didn't notice it was happening. The 90 degree position of the score marks fits perfectly with that theory. Any other ideas ?
As I said, functionally I don't think this matters at all....but just a bummer as when cleaned up this drill could appear as brand spanking new if not for that one issue. (actually it still would appear as new as long as the arm was left in lowest position as the scores are hidden in that position !)
I seriously doubt this effects the actual function or accuracy of the drill at all...but still wondering how the hell it happened ? (and if it might still be happening every time I raise it...doesn't seem too) One is tempted to imagine some sort of hydraulic brake in the arm that has gone amuck pushing against the column too much.
But that's not how the rotation is braked...the rotation is braked via hydraulics wedging the column in position....the arm does not ever rotate on the column and is kept in position by a deep keyway at the rear of the column.
All I can figure is maybe previous owners were drilling something long enough that it scraped against the column while they raised the arm up and they didn't notice it was happening. The 90 degree position of the score marks fits perfectly with that theory. Any other ideas ?
As I said, functionally I don't think this matters at all....but just a bummer as when cleaned up this drill could appear as brand spanking new if not for that one issue. (actually it still would appear as new as long as the arm was left in lowest position as the scores are hidden in that position !)