Milwaukee MLW49-56-7150 3/8-Inch Quick Change Hole Saw Arbor
by Milwaukee
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Product Details
Manufacturer: MilwaukeeModel: 49-56-7150
Product features:
- 3/8 in. hex shank
- 5/8 in. - 18 thread
- Standard pilot 49-56-8010
- For Hole Saws 1-1/4 in. diameter and larger
- This Old House
- The Black & Decker Complete Guide to Home Wiring: Including Information on Home Electronics & Wireless Technology, Revised Edition
Description of Milwaukee MLW49-56-7150 3/8-Inch Quick Change Hole Saw Arbor
This Milwaukee hole saw arbor has a 3/8 inch hex shank for greater gripping capability in the chuck. It can be used in 3/8 inch capacity drills and larger. The arbor has a 5/8-18 thread and can be used on hole saws from 1-1/4 inch and larger. It can be used with 49-56-8010 pilot bit which is supplied with this arbor for use on wood and metal. One arbor and pilot per package.
- Arbor: Snaps in
- Shank: 3/8"
- Hex thread: 5/8" - 18
- Standard pilot: 49-56-8010
- Can use 1/4" flute pilot
- Can us carbide pilot
- For hole saw diameter: 1-1/4" and up
Tools and Hardware Reviews of Milwaukee MLW49-56-7150 3/8-Inch Quick Change Hole Saw Arbor
Customer Review: Easy to use, works great
Summary: 5 Stars
I had to buy this for a couple of hole saws I used in a recent project. I've only previously used the hole saws that were all one piece so I wanted to share the differences.
First, the bit breaking is apparently a common problem when the set screw that holds the pilot bit is overtightened. I've not had this arbor long but I've put about a dozen 2-1/2 to 3 inch holes in 1/4" poplar. I just didn't touch the set screw or the bit. I measured, punched, started with a 3/32" bit and worked up to the bit that came set in this arbor and had no problems at all. Anyway - if you change out the pilot bit you need to read up on just how tight the bit should be. I'm pretty sure that goes for any other arbor as much as this one. In other words, there is no design flaw in this arbor that causes the pilot bit to break.
As far as usage goes, couldn't be easier. The "quick change" is the collar with the 2 pegs. You pop that collar back (it just slides back about 1/2"), spin the arbor threading into the hole saw, and then pop the collar back forward so the pegs go in the holes in the back of the hole saw. How is this quicker than just threading it down and leaving it at that? Well, if the pegs are not engaged then the hole saw is driven by (and the material is cut with) force that tightens the hole saw against the base of the arbor. This may be fine when you're cutting but when you try to remove the hole saw from the arbor you'll need king kong's grip to loosen it. By contrast when the pegs are popped forward then the shear force from those pegs drives the hole saw, which will still easily pop back, so the hole saw is still loose on the threads (there's no need to tighten it fully since the pegs hold it in place).
I think it's also worth mentioning how much easier it is to remove the plug from a hole saw with an arbor that can spin out. When I used a 1-piece hole saw to work door slabs the plug could be a huge pain to get out. Having the arbor be a separate piece from the hole saw means that if the plug is being stubborn I had the option of quickly popping that collar back, spinning the hole saw off, and being able to poke through the pilot hole in the hole saw to get the plug out without putting a bunch of strain on the pilot bit. I didn't realize when I bought these the quick change mechanism also allows easier plug removal but it's a nice fringe benefit to getting away from 1 piece hole saws.
I hope this is helpful in choosing whether you want to get into this style of tool in addition to how this arbor works.
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