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Bosch HB25M Bi-metal 25-Piece Hole Saw Master Set

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Bosch HB25M Bi-metal 25-Piece Hole Saw Master Set

(4 customer reviews)

SKU:

W-BOSHB25M

In Stock

Availability: Usually ships in 1 business days

Bosch HB25M Bi-Metal SetsBosch Power Tools and Accessories is one of the divisions within the Robert Bosch Tool Corporation, which is one of the largest power tool and accessory manufacturers in the world. Bosch provides a complete line of corded and cordless power tools and accessories engineered to survive any jobsite and allow professionals to take control of their work.Bosch HB25M Bi-Metal Sets Specifications:; Description: 11 hole saw 7/8", 1", 1-3/8", 1-1/2", 1-3/4", 1-1/8", 2", 3", 2-1/8", 3/4" and 2-1/2", adapters 1-1/4" -6", 9/16" -1-3/16"; MP Dimensions: 9-1/2" x 12" x 27"&#

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Product Details

Product Length:	0.0 inches
Product Width:	0.0 inches
Product Height:	0.0 inches
Product Weight:	0.0 pounds
Package Length:	12.1 inches
Package Width:	10.3 inches
Package Height:	5.4 inches
Package Weight:	6.4 pounds
Average Customer Rating:	based on 4 reviews

Features

Set Contains: (11) hole saws: 7/8-inch, 1-inch, 1-3/8-inch, 1-1/2-inch, 1-3/4-inch, 1-1/8-inch, 2-inch, 3-inch, 2-1/8-inch, 3/4-inch and 2-1/2-inch
(7) adapters 1-1/4-inch?6-inch;
(4) adapters 9/16-inch?1-3/16-inch; 3/8-inch mandrel; 3-3/8-inch pilot bit; washers

Customer Reviews

Average Customer Review: 4.0

( 4 customer reviews )
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Most Helpful Customer Reviews

5 of 5 found the following review helpful:

Great Hole Saw kit May 03, 2010 By Brent Norman
Fantastic hole saw set. We use these every day for our plumbing business, and the ability to quickly change out the bits is the best feature. The quick disconnect bits also make
the plug removal from the saw a lot faster.

4 of 5 found the following review helpful:

replacement hole saws impossible to find Jan 05, 2011 By Phillip Marsh
Bosch makes great tools but the quick change setup is very limiting. None of the local building supply or hardware stores or national chains carry the Bosh quick change hole saws. To replace them we were ordering online and finally decided it was not worth the trouble. Quick change also makes for a lot of wobble and it only takes Bosch quick change type pilot bits which are also impossible to find at a local store. Pricey for the number of bi-metal hole saws you get and with the quick change you cannot stack the hole saws so spares will not fit in the case.

1 of 1 found the following review helpful:

Good product, but the smaller saws have limited depth. Jan 11, 2012 By Dinko
Quick change concept is convenient, no doubt, but there is a usability issue a buyer should know about:

The quick change mandrel limits the holes depth for the smaller hole saws. This is due to the fact that the mandrel has bigger diameter than the saws and the hole depth can be as much as the saw length, not more - it simply prevents you from drilling deeper. This is quite an issue if you plan to drill the side holes (7/8"[22mm] or 1"[25mm]) when installing door locks. These holes are deeper and you need some sort of an extender or longer adapter to be able to drill them with these saws (not sure if BOSCH has such thing, if somebody knows, please tell). Some may say that you shall not drill a deeper hole than the saw anyway. But buy removing the cut-out core you can go deeper. Well, with the smaller than the mandrel hole saws in this set you can't.

TIP: Hold the saw when you release it from the mandrel, otherwise the spring can launch it and when dropped on a hard floor the saw can brake a tooth or you can chip a tile (and no, this didn't happen to me :).

Otherwise these hole saws are quality made, nicely boxed and can serve you a long time if properly cared after. These are primarily for metal drilling and if used on any type of wood, plywood, MDF, etc. be careful not to preheat them - they can be easily burned and damaged.

Awesome quick-change system; works with other brands' hole saws, too! Jul 26, 2011 By Nathaniel Allen
I'm loving this system! I've been using mine for a number of months -- maybe a year -- after becoming frustrated changing the traditional thread-in arbors when switching between sizes. As you're probably aware, the threads tend to tighten with use, making removal ridiculously difficult. And then there's the matter of slipping pilot bits.

Bosch's system does away with all of that, and this kit was a pretty cost-effective way for me to get started, along with a package of Bosch CK2 Quick Change Conversion Kit to convert some of my other hole saws made by the likes of Lenox, Milwaukee, Ridgid and Vermont American.

And that's the beauty of this system: just about every hole saw I've come across at my local hardware stores will work with Bosch's system. All I need is a Bosch adapter -- each of which cost less than three bucks -- and the saw is ready to work with Bosch's mandrel and pilot bit.

Bosch even makes a SDS version of the mandrel, so my collection of hole saws can quickly be switched between regular and SDS drills.

The pilot bits are also quick-connect hex ends, and they simply pull out / click in to place, with no loosening or tightening necessary. This allows me to easily change between wood and masonry bits, depending on the task at hand.

Removing wood plugs is a cinch. If one becomes stuck, pull the collar of the mandrel to release the saw, then use the pilot bit to gently (but quickly) pop the plug out. It's way easier with the pilot bit removed.

Once a hole saw is damaged or worn out, the Bosch adapter easily unscrews for reuse with another saw. And the threads don't tighten making removal difficult; once threaded in to the saw, the twisting force is transmitted through the two drive holes on either side of the threaded hole.

If there's one criticism I have of these adapters, it's that the threaded end protrudes just slightly into the interior space of the hole saw. The amount varies based on the thickness of the saw, but this protrusion occurs even on Bosch's saws. Normally not a problem when working with rough-cut 2x lumber, it's on the margin with some of the "less deep" hole saws I use, meaning the Bosch adapter obstructs the last 1/16" of my cut, preventing the flat back of the saw from contacting the wood (i.e. obstructing full depth of cut).

The solution? Unthread the Bosch adapter a few turns until the end is flush with the back of the saw. It seems unnatural, but the threads don't transmit the turning force, and a spring on each Bosch adapter keeps the two "drive prongs" engaged with their respective holes. This probably all reads as gibberish, but read this again with one of these saws in-hand and it ought to become clear.