Milling Attachments Milling attachments consists of a vertical slide with an inclinable milling spindle. The milling attachment is designed to clamp to the lathe carriage tee slots and is driven by a 6mm round belt from overhead. These attachments are incredibly useful even when milling facilities are available since so many jobs can be turned and milled in one chucking. This is particularly useful when concentricity is paramount as in horological wheel and pinion milling. Two versions of milling attachments for the Schaublin 70 and 102 exist. The earlier attachments (left) had flat backs while the later ones (below) had "humped" backs and this is generally how they are known. The 70 and 102 items are very similar except in size and in the type of collet employed. Early flat back 70 milling attachments used B8 (horological) collets while the 102 version employed W12 collets and had a speed reduction gearbox fitted to the spindle. Later hump back attachments employ W12 and W20 collets for the 70 and 102 respectively. While humped back versions are obviously more rigid than the earlier attachments both are extremely sturdy and more than fit for their purpose. I use both the earlier and later milling attachments on my 102 and find that the flat back attachment has distinct advantages over the later "hump back" item mainly due to its compactness and built in speed reduction gearbox. The earlier milling attachment is particularly useful for horological milling. On the other hand, the larger collet capacity and higher spindle speeds of the later attachment have distinct advantages for certain types of work.    The grinding attachments illustrated elsewhere can also be fitted to the vertical slide as can a microscope and high speed milling and drilling spindle (made by GEPY) enabling jig boring operations to be conducted.