Precise cross drilling remains a hallmark of fine work. This versatile jig is simple to construct and offers many inherent advantages. It is intended to be machined directly on the topslide of a Myford Series 7 lathe, guaranteeing accurate location of the guide bush to the "V" groove. For larger lathes, a sandwich piece can be to the base of the casting.
The "V" groove is produced by taking successive cuts with end mills of reducing diameter, to give a stepped "V". Shafts from Ø1/8" to Ø1" can be securely accommodated.
The jig can be used on the drill press or milling table of course, but use in the lathe allows angular cross drilling and makes an excellent work holder for milling keyways etc. A simple methodology is explained for simultaneously drilling shafts and collars. We invite you to kiss goodbye to off-centre embarrassments.
Offered as a kit consisting of an iron casting, steel, fasteners, drawing and instructions.