Bergström Quick-set Toolpost Sweden
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Manufactured in Sweden, the Bergström Quick-set Toolpost was of the standard Dickson type with a central block, machined on two sides to take a number of different toolholders. Once correctly adjusted, the tool was left in the holder and the pair could then be removed and replaced without the need for further adjustment - so completely obviating the need to fiddle with packing pieces. As with other types - the best-known of whom are British "Dickson" with its similar dovetail clamping system, the American "Multifix. In order to get the best from any of these types, as usual,, a selection of extra holders was needed so that each commonly-used tool could be left in place ready for immediate use.
Bergström offered eight different sizes of block and associated holders to suit lathes from below 4.5-inch centre height to ones above 20 inches. In addition, the Company offered to modify, without cost, the central block to suit a customer's particular lathe. Ordinary and "double" toolholders to take standard, parting, boring and Morse taper bits were available, though not all could be supplied for each size of block - the chart below (published in the 1960s) shows the availability.
All makes of quick-set toolholder require careful handling for, while the larger sizes are largely immune to careless use, the smaller versions should be treated with care: it is not necessary to brutally yank up the adjustment and retaining screws; instead, just firm hand pressure will lock the units securely against the heaviest work.