Author Topic: Hole saws- which one is the best  (Read 11290 times)

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Offline Michael Kellough

  • Posts: 4867
Re: Hole saws- which one is the best
« Reply #60 on: September 04, 2020, 12:35 PM »

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Offline TinyShop

  • Posts: 462
Re: Hole saws- which one is the best
« Reply #62 on: September 05, 2020, 04:54 AM »
I'm surprised no one has suggested an adjustable circle cutter:



https://www.starminfo.com/en/product/jizai/36t.html

Assuming there's no need to work in a tight space, seems a circle cutter offers all kinds of versatility. Plus, there's the option of HSS, carbide or even diamond.

Star-M even makes a range of tool-free versions:



What do folks think of a single circle cutter in place of an entire set of holesaws?
« Last Edit: September 05, 2020, 05:27 AM by TinyShop »
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Offline SRSemenza

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  • Finger Lakes Region, NY State , USA
Re: Hole saws- which one is the best
« Reply #63 on: September 06, 2020, 12:32 AM »
I'm surprised no one has suggested an adjustable circle cutter:


Assuming there's no need to work in a tight space, seems a circle cutter offers all kinds of versatility. Plus, there's the option of HSS, carbide or even diamond.

Star-M even makes a range of tool-free versions:



What do folks think of a single circle cutter in place of an entire set of holesaws?


 I never used one but they always look like they would be hard to control. Maybe not?

 I think the biggest drawback would be the size. And swing radius. I have already used several of the hole saws I just got near walls and cabinets where that would never have room.

  Can those be used without the center bit (on a drill press)?  If not then they would not work for making round disks without a center hole.

  I also can't imagine the cutter working well on a 90 degree angle head. Might work but seems awkward and maybe even risky to a hand in the wrong place.

 The pro of course is that it is one cutter that can make any size in the range.

        In my case if I had a circle cutter I would still end up with a set of hole saws. But I think it depends on the users intended cutting purpose.



Seth

Offline aloysius

  • Posts: 418
Re: Hole saws- which one is the best
« Reply #64 on: September 06, 2020, 04:03 AM »
I honestly don't think there's a "best hole-saw".  Just the best for the job.  Working at a remote location (250 KM from base) I had a series of downlights to install in Hardieflex.  A colleague's holesaw enthusiastically cut exactly 3 holes before it stopped cutting. I then (carefully) managed 7 before mine was too blunt to use.  Both were new & expensive bimetallics:  Sutton & Sandvik from memory.

If we'd been using Carbide gritted saws instead, the saw would've laughed at the task (20 odd lights) & shown virtually no wear at all.  Unfortunately, we weren't aware that we would be drilling fibre cement, & had no access to the "right" material saws.

Yet I've cut 3" holes with the same well-lubed Sandvik bimetallics in structural steel girders!  Slow & steady works well here.

TCT saws seem to work well in synthetic board, yet tend to burn their way through natural hardwood.  A simple auger (<50mm) works best here.  Expanding-wing augers in a simple old-school handbrace can be remarkably effective in hardwood too, but blunt quickly in synthetics.

Diamond gritted saws & cores work best in concrete, masonry & certain softer marble, limestone, sandstone & ceramic tile.  Water is the best lube & cooling medium here.

I've never really found much diff between any of the particular "brands" that I've used over the years, but admittedly they've always been fairly expensive quality brands:  Marcrist, Husqvarna, Lennox, Sandvik/Bahco, Sutton et. al

I've also noted that others seem to try to spin larger holesaws in any material way too fast to cut effectively.  A big, powerful, high-torque power drill or the very best cordless money can buy is needed to turn a large diameter holesaw at the correct (low) speed.  Years ago, that for me was Bobbie Bosch 1500w (2 HP) corded or 36V cordless drills, both fitted with extra-long auxiliary handles for safety.
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Offline Cheese

  • Posts: 7675
Re: Hole saws, Starrett Quick Change
« Reply #65 on: September 07, 2020, 11:04 AM »
Here's an interesting quick change system for swapping out different sized hole saws if that's what you're up against.

A Starrett A-6 quick change chuck that's available in hex or SDS drive.
From Starrett:
Fast, tool-free changes between different sizes and types of Hole Saws and Pilot Drills. Provides a simple method for core ejection and hole enlargement. A6 Kwik Change Chuck for use with Hole Saws up to 6"/152mm diameter.






A quick change adapter that's available in 1/2-20 or 5/8-18 to fit all hole saw diameters from 14 to 152 mm.






Just attach the adapter to the required hole saws and with the push of a button you can swap out the holes saws instantly.

« Last Edit: September 07, 2020, 11:14 AM by Cheese »