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Some serious metal removal to transform this scrap piece of material into a shop made BT50 tool holder for our SIP jig borer tooling! In this video we are making a custom BT50 tool holder to suit all of our bigger SIP hydroptic jig borer tooling but mainly so we can use our Wohlhaupter boring and facing head which has a SIP jig borer arbor. The SIP machines have a very unique spindle and all of the jig borer tools have a matching arbour and drive collet to suit it, but that means we can’t use any of the SIP tools in our conventional milling machines…until now! In this video we show the step-by-step process of turning a scrap piece of 4140 round bar into a new BT50 adapter. First, we setup the angle of the lathe compound to match a standard BT50 arbour before rough machining the OD of the round bar. We then drill and tap a hole to suit the drawer bar bolt of the mill before machining the BT50 taper. We then have to setup the angle of the lathe compound to suit the jig borer tooling before machining the
