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DEWALT Hole Saw Mandrel, Quick Change, 1-1/4-Inch to 6-Inch Diameter, 7/16-Inch Shank (DW1803)

  • DEWALT Hole Saw Mandrel, Quick Change, 1-1/4-Inch to 6-Inch Diameter, 7/16-Inch Shank (DW1803)
  • DEWALT Hole Saw Mandrel, Quick Change, 1-1/4-Inch to 6-Inch Diameter, 7/16-Inch Shank (DW1803)
  • DEWALT Hole Saw Mandrel, Quick Change, 1-1/4-Inch to 6-Inch Diameter, 7/16-Inch Shank (DW1803)
  • DEWALT Hole Saw Mandrel, Quick Change, 1-1/4-Inch to 6-Inch Diameter, 7/16-Inch Shank (DW1803)

DEWALT Hole Saw Mandrel, Quick Change, 1-1/4-Inch to 6-Inch Diameter, 7/16-Inch Shank (DW1803)

£60.00 £36.00 Save: £24.00
£36.00 £60.00 You save: £24.00

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Delivery Time: 15-20 days
Delivery Time: 15-20 days

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Description
  • DW1810 offers tool-free quick-release collar to prevent hole saws from locking to the mandrel
  • DW1803 and DW1805 offer spring-loaded collar that automatically engages drive pins to prevent hole saws from locking to the mandrel
  • All quick change mandrels feature double set screws with a recessed combination head for quick and easy centering bit changes
  • All quick change mandrels utillize hardened steel construction and have been tested through 15,000+ cycles to deliver jobsite durability
  • DEWALT offers a full range of standard and quick change mandrels for versatility in a wide range of hole saw applications
  • Fits Hole Saws 1-1/4-Inch to 6-Inch
  • DW1810 offers tool-free quick-release collar to prevent hole saws from locking to the mandrel
  • DW1803 and DW1805 offer spring-loaded collar that automatically engages drive pins to prevent hole saws from locking to the mandrel
  • All quick change mandrels feature double set screws with a recessed combination head for quick and easy centering bit changes
  • All quick change mandrels utillize hardened steel construction and have been tested through 15,000+ cycles to deliver jobsite durability
  • DEWALT offers a full range of standard and quick change mandrels for versatility in a wide range of hole saw applications.
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Customer Reviews

Professional-quality product, built to last As this was my first hole saw and I didn't already have the mandrel portion, I ordered the combo of 2"-dia (2"-max-depth) hole saw and 7/16"-shank mandrel [DW1803] recommended by Amazon. The 7/16" mandrel shank is too large for my venerable 3/8"-chuck corded Black & Decker drill, so I used it in my 1/2"-chuck cordless Dewalt drill. In retrospect, since the mandrel shank is nicely hex-shaped to prevent slippage within the chuck, the similar 3/8"-shank Dewalt mandrel [DW1805] would have also worked just fine. If you only have a drill with a 3/8" chuck or have drills with various chuck sizes like me, that's the one you want.To newbies like me the quick-change mandrel is a little confusing at first, so thanks to the previous commenters who provided tips on how to use it. Briefly, the Dewalt quick-change mechanism is both a locking and anti-locking device. The 2 pegs in the silver-colored locking collar snap into one of the 2 opposing-hole pairs in the bottom of any Dewalt hole saw to hold the cutting end in place, but at the same time prevent the hole saw from locking itself onto the mandrel under the torque of drilling. Just slip the mandrel shank into your drill chuck & tighten down, then with the drill positioned the way you'll be using it (butt end against your belly), use one hand to pull the locking collar toward you as far as you can, and the other hand to screw the barrel end of the hole saw onto the threaded part of the mandrel. You should end up such that tightening the barrel part all the way down leaves the locking pins misaligned with both of the crosswise pairs of receiving holes, at which point you unscrew the barrel just enough to allow the pins to snap into the nearest hole pair. In my case this left a very slight gap between the flat bottom of the barrel part and the mandrel but there was no discernible looseness of the hole saw, which I expect is exactly as intended by the assembly designers.For precision work I found it helpful to drill a 1/8"-dia pilot hole which helps center the 1/4" pilot bit of the mandrel and get the cut started nicely. Once the annular cut is established the hole saw is conveniently "self-centering," since the entering portion of the barrel has no choice but to follow the outlines of the existing annular cut. It can be surprisingly tricky to keep the hole saw axis aligned precisely at the proper angle, so when precision is needed, I recommend drilling at least one practice hole in a scrap block of wood of the same or similar kind as the actual target material. My first (practice) hole ended up a dismaying 3-4 degrees off-kilter, but my second was better. If you really need precision and will be cutting multiple holes, I suggest setting up some kind drilling jig to keep things moving at the desired angle.As others have noted, gentle circular rocking of the hole saw - but not enough to jam up the cut - helps clear the sawdust out and keep things progressing smoothly. The very sharp teeth of the hole saw are in a slightly-offset staggered pattern which cuts a 1/8" kerf, slightly wider than the walls of the barrel are thick, in order to prevent jamming and allow the resulting sawdust to flow out easily.I used the 2" hole saw to form the male end (tenon) of something I call a "peg mortise", in a pair of 4x4s joining at right angle [See here for pics: http://www.mersenneforum.org/showpost.php?p=409015&postcount=84/]. (Being strictly an amateur carpenter, I don't know if there is a different 'standard' name for this type of joint.) Here the 1/8" kerf width of the Dewalt hole saw proves very handy in a further way, because I then used a standard 1.75" auger bit to drill the female end (mortise) of the joint, and everything fit beautifully. (I could have also used a 1.75"-OD hole saw for this, but didn't own such a one, whereas I did have an auger bit of the needed size. An auger bit for the mortise hole requires more material to be removed, but has the advantage of not leaving a wood plug that needs to be chiseled out - pretty much a "six of one, half-dozen of the other" deal. On the other hand if your mortise goes all the way through the piece of receiving wood, a hole saw will definitely be more more efficient for that kind of hole.) Lastly, I used the centering hole left in the tenon by the pilot bit of the hole-saw mandrel by drilling a same-1/4"-diameter hole the rest of the way through the center of the mortise (which in my case only went 1.5" sideways into a 4x4, roughly halfway through) and then using a lag screw started from the opposite side of the 4x4 to firmly fasten everything together. The above link has pictures and more details. A very nice way of doing such joinery when appearance matters and you can't just slap things together with a metal joist hanger or whatnot.All in all, a great tool(set)! Thanks to the folks at Dewalt for really thinking the design through and - as always - manufacturing a professional-quality product, built to last. 5DEWALT DW1803 Heavy Duty 7/16-Inch Shank Quick Change Mandrel-does it work? I love how easy it is to mate this to a hole saw bit. You tighten it down until the two locking pins engage. No more using a wrench and a back up wrench to secure mandrel to hole saw. This allows for easy removal pull back on quick release(think air hose connection) then unscrew it. The lockup is very secure will not spin the mandrel on the hole saw bit at all. I will only buy hole saw bits that support the dual pin lock going forward. I usually try to include any negatives but so far there has not been any. 5Serviceable Arbor...But can't be used with 3/8" drill chuck The problem with this arbor is that it can only be used with a 1/2" drill. Its 7/16" hex shaft is too big for a 3/8" drill. This is a big disadvantage for drilling 4" holes in ceilings for recessed lighting cans where a 3/8" drill is more than adequate. In looking at Dewalt's 3/8" arbor, it claims to be only usable with small hole saws and doesn't describe the thread size it uses for the hole saw engagement. Also, the photo used on the Amazon site for the Dewalt 3/8" hole saw arbor is actually the picture for Dewalt's 7/16" arbor. Thus there is no way to reliably order a Dewalt arbor for a 3/8" drill to fit a hole saw with a 5/8"-18 engagement thread. I gave up and ordered a Milwaukee 49-56-7250 Hole Saw Large Arbor 3/8" Q/C, Ergo Grip. 3Quick - As Advertised! I've only ever purchased cheap hole saws and shanks from my local discount tool store. I've had hit and miss luck with those. Usually they end up wearing loose and the hole saw begins to wobble. When purchasing this, I had a hard time believing you could "quickly" swap hole saws with this thing and that they would still be held on tightly. Let me just say, this thing works amazingly well.It attaches with threads that screw into the back of the hole saw blade. Once you get about 1/4" in, you pull the silver colored part away from the the back of the hole saw blade and screw another 1/4" or so. When you release the silver part, it releases 2 pins that will line up with the hole saw blade to lock it into place. Quick, easy, no tools required and it is SOLID. I am very happy with this product and would not hesitate to purchase it again. 5Easy to use and heavy duty. Easy to use, bought it to drill grommet holes in a desk and wound up using it for many things!!! Great for starting cutouts in drywall. I used it to start holes for in-wall speakers. Tough and durable, well made, heavy. Nice adjustability of the center drill bit inside the circle saw component. 5Great item that is still the best out there even with its 1 small flaw. Easily the best mandrel I ve used. Really easy to use, get hole saws on/off, etc. Love it. And it DID fit my 3/8 Dewalt cordless drill.Only knock, and the only reason it doesn t get a full 5 stars, is the center bit. Yes, I understand that you re supposed to drill a pilot hole with another bit, but still - the bit breaks way, WAY too easy. It snapped off almost immediately on my first use. Luckily it is replaceable. 4BEAT OUT 20 OTHER MANDRELS WE USED DRILLING 2000 HOLES IM A COMMERCIAL PLUMBER, WE HAVE TO DRILL A LOT OF LARGE HOLES, ABOUT 2000 HOLES ON ONE JOB, AND IVE TRIED EVERY ARBOR SOLD HERE IN THE USA, THIS ONE IS SO FAR THE BEST OF ALL. THE SCREW THAT HOLDS THE PILOT BIT IN, IS A LARGER HEX THAN THE REST, BUT ALSO HAS A LARGE SLOT THROUGH IT, WHICH MAKES IT EVEN EASIER TO CHANGE ON THE FLY. THE HEX SCREWS ON ALL OTHER QUICK CHANGE MANDRELS, STRIPPED OUT AFTER ONE USE, THIS ONE HAS OUT LIVED 20 OTHER MANDRELS.WE USED THIS ON 1.5" UP TO 5" SUPER HOG DRILL BITS 5Solid and does the job Used it with hole saws ranging from 2" to 5.75". Mostly, I want to address the 1-star reviews those who are breaking the pilot bit are doing so because they're not pre-drilling a smaller pilot hole first. Second, those who are breaking the 2 pins are most likely using an impact drill or hammer drill; I've learned that lesson. My point is that many users are blaming the product for their misuse. 5Great product This will be money well spent if you use the bi-metal hole saw very much, especially the larger diameters. The arbor will even accept hole saws other than the Dewalt brand. The locking pins will even match up on my other hole saws so...I am not sure if this is by design or by accident but the end result is they fit and it really makes your hole saw fit good and snug. You can just drill away with no sweat.A mighty fine product at a fair price. 5Worked great, after a I got a bigger drill It worked out ok, but be aware that this mandrel requires a drill with a 1/2inch chuck. I had to go buy a new drill in order to use this, but heck, I needed a new drill anyway. It was annoying to have to stop in the middle of my project to go get another drill, but I should have paid attention to description. Don't make the same mistake, or you'll need a new drill too. The again, what a great excuse to get a new drill. 5
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