The objective is to bore out a 1 1/8 hole in cast aluminum to 1 5/16. The hole is about 1 inch in depth. My plan is to create a centering tool to ensure the casting is aligned and then to bore the hole with a fly cutter. The fly cutter will be tested fist to ensure proper diameter. Given the alignment is correct is this a reasonable approach?
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Using a fly cutter to bore out an aluminum casting
- Thread starter dansawyer
- Start date
- Joined
- Jun 7, 2013
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- 10,452
The reasonable approach, beyond setting the center, is to "cut and try" so far as size is concerned; take a small cut that you know is undersize, cut to that diameter, measure, and take another cut after adjusting the tool out against a dial indicator, until the target diameter is reached.
loosen the screws slightly set a dial indicator on the cutting tip and tap the toolbit out a bit and tighten screws again and take a trial cut. that's where the patience comes in. not a good or easy as a boring head but if you don't have a boring head, do with what you have bill
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- Dec 21, 2013
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- 798
Whut them other guys said ........ BTDT !!!! .........
Once you have centred yourself over the whole. Zero x and y so you can return here. Touch off on an edge of a pc. Of scrap. Centre your spindle over the edge. Now move your spindle over to the size of The radius for the hole size. Mount your flycutter and adjust your cutter until it touches off on your scrap. Now your cutter is set to the size of hole you want. This could be used for your final cut and to be somewhat accurate.
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- May 16, 2016
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Yes it will work, but will be difficult to adjust cutter for final dimensions. If your tolerances on dia, are fairly tight, you might want to rethink it.
Can you spring for an adjustable boring head they are not that dear these days.
However if your tolerances are not so important then go for it. As BFD says use a dial indicator to set the tool will help.
Can you spring for an adjustable boring head they are not that dear these days.
However if your tolerances are not so important then go for it. As BFD says use a dial indicator to set the tool will help.
- Joined
- Feb 26, 2014
- Messages
- 276
Stu
There you go! Thx Bill stupac. This video is simialr to what I was talking about. Alot of Automotive, moto, atv, lawn mowers are bored with a flycutter. Usually set and left aside for final dimensions. Nice and rigid and no bar flex. Many ways to skin a cat!