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The R8 is available in calibers from .204 Ruger to .500 Jeffery. [3] [4] Different bolt heads for different groups of calibers are user changeable and the barrel has a quick-change design which lets the user switch barrels using two screws and a hex key, making the Blaser R8 a modular firearm.
The Blaser R8 displays an enlarged locking surface of 96 mm 2 (0.149 in 2) compared to 66 mm 2 (0.102 in 2) of the R93. [11] While the R93 collet has a locking angle of about 50 degrees, the angle of the R8 has been steepened to almost 90 degrees. Further the radial collet opens differently.
Perhaps the former statement should be rewritten as "Thus a given collet holds any diameter ranging from its nominal size to its 0.5 to 2mm smaller collapsed size, and a full set of ER collets in nominal 1mm steps (or 0.5mm steps for smaller size ER collets) fits any possible cylindrical diameter within the capacity of the series."--
The R8 system is commonly used with collets ranging in size from 1 ⁄ 8 ″ to 3 ⁄ 4 ″ in diameter or tool holders with the same or slightly larger diameters. The collets or tool holders are placed directly into the spindle and the drawbar is tightened into the top of the collet or tool holder from above the spindle.
Several machine collets (top and centre) and a dismantled pin chuck (below). Generally, a collet chuck, [3] considered as a unit, consists of a tapered receiving sleeve (sometimes integral with the machine spindle), the collet proper (usually made of spring steel) which is inserted into the receiving sleeve, and (often) a cap that screws over the collet, clamping it via another taper.
For hoses and piping, a quick connect fitting, also called a push fitting, is a coupling used to provide a fast, make-or-break connection of gas or liquid transfer lines. Operated by hand, quick connect fittings replace threaded or flanged connections, which require wrenches. When equipped with self-sealing valves, quick connect fittings will ...