Flipped part and chamfers are offset on x axis

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Originally Posted by dazp1976

Depending on the hole size, I kept a load of broken end mills of varying sizes.
I use the shanks of these fitted into the spindle nose to line up to a drilled hole. Generally between sizes 3-8mm.

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Broken End Mills, where do they come from, I have hundreds of End Mills but no broken ones.

Yes this is a way to do it if you have +/- .005" on a part tolerance.

Gauge Pins or bar stock work for this rough hole location method as well.

...use a nevusor nully Dial Indiccator...when Jig boring holes
https://www.ebay.com/sch/i.html?_fro...apid&_osacat=0

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Originally Posted by mactec54

Broken End Mills, where do they come from, I have hundreds of End Mills but no broken ones.

Yes this is a way to do it if you have +/- .005" on a part tolerance.

Gauge Pins or bar stock work for this rough hole location method as well.

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+ remember that, if you enter side 1 from say bottom left and flip it over left to right. Enter side 2 from bottom right, ergo opposite side. This helps against a machine that has some backlash.

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Originally Posted by dazp1976

+ remember that, if you enter side 1 from say bottom left and flip it over left to right. Enter side 2 from bottom right, ergo opposite side. This helps against a machine that has some backlash.

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Backlash is still there no matter how you look at the part, if indicating a Hole, you will see any backlash if there is any, with using a pin you won't know what or where you are with the machine backlash.