How to change a bolt pattern on an axle shaft using a DRO

How to change a bolt pattern on an axle shaft for a ford 9" from 5x5 to 4.75x5 using a Bridgeport m head and a digital read out
#boltpatternchange #axleredrill #bridgeportmillingmachine #DRO #moser #ford9inch #starrett #boltholecircle
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[@manuelrys60]

You could also center drill all the holes then just drill with drill bits as needed!

[@ht_fab3525]

Im sure there is several different methods whatever works right?

[@charlieromeo7663]

Nice work. I’ve been considering doing this for the local race guys. Your setup looks nice and rigid. This video gives me the confidence to do it. BTW, have you considered verifying hole diameters with gauge pins?

[@ht_fab3525]

I did not gauge pin them i just kinda went with the average press fit tolerance and measured with small hole gauges seemed to be a good fit when pressed in! Thanks for watching

[@matthewsalmon8194]

Usually you see this kind of work liquid cooled - as the heat from the drill can warp the disc

[@ht_fab3525]

It didn’t seam to heat up to much but i do run a noga mini cool mist sprayer now.

[@treehouseoffroad]

Very cool man awesome work!
I know this is an older video but I have a couple questions. Where are you located and how much would you charge to do a job like this for a customer?
Thanks

[@ht_fab3525]

Thanks for watching. Cant see it costing much but i just machine as a hobby right now. In ct

[@treehouseoffroad]

@@ht_fab3525 Cool thanks for replying!