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>Bush-less sliding-head turning: The ability to remove the guide bush has 'heralded a natural successor to the single-spindle cam auto': The ability to remove the guide bush has 'heralded a natural successor to the single-spindle cam auto'
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Bush-less sliding-head turning: The ability to remove the guide bush has 'heralded a natural successor to the single-spindle cam auto': The ability to remove the guide bush has 'heralded a natural successor to the single-spindle cam auto'
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机译：Bush-less sliding-head turning: The ability to remove the guide bush has 'heralded a natural successor to the single-spindle cam auto': The ability to remove the guide bush has 'heralded a natural successor to the single-spindle cam auto'
A manufacturer of top-quality brass lampholders, that is now in its sixth generation of family ownership, S Lilley & Son Ltd has nearly finished phasing out the 20 or so cam-type single-spindle bar autos it has used in its Birmingham factory since the 1950s. In their place are to be found 11 modern CNC, twin-spindle bar-fed lathes up to 65mm capacity with driven tooling, six of them supplied by Bushey-based Citizen Machinery UK Ltd (www.citizenmachinery.co.uk). Two are Miyano BNA42-MSY fixed-head turning centres of 42mm capacity installed in 2017 and 2021, while the other four are Cincom sliding-head models (sliders). Two are for turning, milling and drilling bar up to 32mm in diameter and two for processing 20mm stock. Moreover, to achieve the high speed of production for which cam technology (albeit outdated) is renowned and couple it with the inherent advantages of CNC technology - unattended running and rapid changeover for smaller economical batch sizes - S Lilley & Son operates the sliding-head machines almost exclusively without the guide bush in place, since most components for the light fittings the company makes are shorter than 3.5-times their diameter.
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