Drilling Large Holes in Cast Iron with a Trepan Tool!

Trepan drilling with Paul Debolt. Boring large holes to diameter "takes too long and wastes material." Trepanning saves time and money! Not only does it require less horsepower than typical drills, a pristine slug is left behind, which can be sold or used to make other parts.

Paul walks us through how he uses his trepan tool, which is made of a Sandvik trepanning tool shank and a custom adapter for the tailstock. This approx. 3.75" hole is for the center of the Debolt Tramming Ring, which trues Bridgeport type milling machine heads WITHOUT indicator skip!

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Links for this video

Debolt Machining Tramming Ring | https://bit.ly/2SKQrXR

Debolt Machine Shop Tour | http://bit.ly/2trcvu0

Sandvik Trepanning Tool | https://bit.ly/2L9IiIA

Sandvik Technical Guides & Products | https://bit.ly/2YTLQH1

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