redbelly wrote:
> Why not drill both holes from the same side? Drill the large hole to
> desired depth, then replace with the smaller drill bit and continue
> drilling all the way through. You would save a ton of time.
>
> Mark
>
Macor chips really badly when you do that.
Re: Moving a hole in a casting, by half a hole ...drill (until some B returns my engine hoist, and even then it will be ... There can't be many forces on a lathe that try and bodily lift it from ... need the stand holes to be through holes. ...Plugs work best in blind ... (uk.rec.models.engineering)
Re: Drilling dilema ... Drilled about 2000 holes, when I noticed that the top edge was starting to get a little ragged, and the inside was tearing somewhat. ... So I figured the drill was starting to wear at the corners, ... Vibration (belt drive spindle), spindle bearings, runout in the spindle taper? ... The inside tearing may be that the drill is pushing material down into the drill tip holes vs drilling firmly against a subplate.... (alt.machines.cnc)
Re: Tool Terms ... You don't *have* a T-slot on that lathe,... When the tap reaches a pre-set depth, ... I don't have a mill or drill yet but this looks interestiung: ... with 36 equally spaced holes and another with 10 holes. ... (rec.crafts.metalworking)
Re: Hammer-Drill Technique? ... > walls to put up some adjustable metal shelf "standards" (rails).... > 5 countersunk holes spaced along them. ... I made a drill guide that ensures ... I have a 1/2" Bosch hammer drill to drill the holes, ... (rec.crafts.metalworking)
Re: [OT] Using a Dremel tool for drilling PCBs ... Then I will need to drill the PCBs. ... expect to have about 150 holes per board. ... I have a Dremel tool with RPM adjustable from 5000 to 35000. ... I set my software to print 0.025" dia guide holes.... (sci.electronics.design)
