Some time ago I bougth an Isoma centering microscope with ans SK40 adaptor. However I have no SK40 machine at all. During the last days I have been turning a cylindric tail which let me to use the microscope in the lathe as well as in the milling machine. The part was dimensioned from an original one. It is a M15x0.75 threaded end with two main features: A 16mm bushing guide that assures concentricity, and A mating ring that assures perpendicularity.

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One of the jobs done this summer is a special square intended to facilitate the alignment of the grinder axis. I own a Klaiber WSII tool grinder. This grinder has a head with several degrees of freedom and aligning it to the table is not easy given the poor quality of the head scales. Thus, I decided to build a particular square that fits in the head nose and offers a reference plane to test with the indicator or the protractor, for instance.

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The tailstock Some time ago I bought an old series Boley Leinen lever tailstock to be fitted to my lathe. This is the tailstock: It is of the old type because it uses a split casting to lock the barrel as you can see in the picture. Leinen buid two flavors of this tailstock: one with a barrel that takes 363E collets (the 25mm collets) and other that takes the 323E collets (15mm collets).

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I was obsessed with those beautiful optional tailstocks built by Leinen that appear in the lathe parts catalog. An intense surveillance in ebay has given some partial results. The first attempt achieved this nice capstan-handle tailstock that admits the 25 mm 363E collets: However, although the tailstock is in pretty good condition (just cosmetic issues) it is not appropiate to the Leinen LZ4SB dimensions. It shares the 130mm center height but the bed dimensions are not the same.

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I bought in german ebay a four jaws independent chuck with DIN 55022 number 4 fitting. This was not the kind of independent chuck I prefer for the Leinen lathe. I would prefered those kind of “old” chucks which are lighter than the modern ones. Having found no provider for these lighter chucks, finally I went for this one. The chuck can be seen in this picture: The chuck was in pretty good condition.

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I got them Yesterday I acquired an almost complete set of collets for the Leinen lathe. It was achieved through a rather unusual offer in german ebay. After an year following ebay and other forums looking for Leinen collets last week I found an almost complete set in very good condition and including the draw bar. It was really an incredible discovery. I found no traces of leinen collets during a year and suddenly it appeared an entire set of them.

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