Bosch 3-Jaw Keyless Chuck with SDS-Plus Shank, 1/2-Inch HA3JAW

Good quality

There are many false reviews for the product. This item works great. DO NOT USE ON IMPACT DRILL SETTINGS!! It will break. It is written on the package in small print. Contacted BOSCH and advised to print caution in larger print on the front of the package and more clear info in description.

This item arrived as scheduled & was well packaged for shipment. The item was exactly as described & worked great. It was a little pricey, but it is a named brand. I am pleased with the purchase & would buy from this seller again in the future. I would also refer them to my family & friends.

works for now

Amazing! I can’t afford a new hammer drill so the ability to put this in my old rotary hammer (A DC212 7/8” Rotary Hammer) makes my life easier. The majority of my work is framing/remodels and this gets the job done. You get a lot of power and versatility. The bits lock in very well, but to get it to grip you have to hold the bottom part below the blue line and twist the textured top. It fit in my drill well, it moves half an inch to compensate for impacting. It’s worth the money, the value is through the roof!

Initially I wasn't sure whether to get this or the SDS shank keyed chuck, I haven't had any problems with the HA3JAW. It's for boring large holes in wood, and for large drill bits that don't come in SDS shank. The price seems to fluctuate wildly. The rest of the review is a combined one.. I purchased the RH328VC to drill holes in concrete walls, my garage/workshop walls are 8ft high concrete. This looks like it will do the job and be useful for drilling large holes in lumber as well. It's a quality tool, and comes with a decent case which I think is essential, and I don't believe in paying $50+ extra for one. It is heavy (8.25lbs) so I can't see myself using it on a ceiling. I also purchased a HA3JAW keyless chuck to use with large regular shank drill bits at thirty five, this adds another 0.75lbs. When latched into the SDS chuck it has about 1/2" of forward back movement. Apparently this IS normal for an SDS shank chuck or drill bit-"The drill bit is not held solidly in the chuck, but can slide back and forth like a piston. The hammer of the drill acts to accelerate only the drill bit itself, and not the large mass of the chuck, which makes hammer drilling with an SDS shank drill bit much more productive than with other types of shank". This probably means that the optional HA3JAW keyless chuck should only be used in drill mode, even if you have round shank masonry drill bits. The RH328VC case has storage for small parts, drills, etc and also a generous area for coiling up the power cable. The case appears to be an improved design -the one that came with my Bosch 3/8" drill is worn out -the "living" hinges and the latches are all broken on that (the drill still works fine though). This case has seperate hinges and latches. I'm not that familiar with SDS but originally it was named by Bosch 'The SDS bit was developed by Bosch in 1975 and the name comes from the German "Steck - Dreh - Sitz" (Insert - Twist - Stay)'. Both the RH328VC and the HA3JAW, are Made in Germany.

I purchased this chuck as a replacement for the original. I've used it once and now it won't open and is falling apart. Junk to me now.

Excellent chuck. Very strong and built with high quality materials. Very strong jaws. Has a ratcheting clutch like action and sound to it when hand tightening the chuck. Easy to loosen as well. Never comes loose when you are using it. Stays tight on your bit during all actions. When I got this unit, I took off the SDS adapter shaft and put it on a regular keyed chuck. I've heard that using a keyed chuck with a hammer drill, is better overall, rather than using a keyless chuck with a hammerdrill. I'm sure that it would have worked just fine with a hammerdrill though. So I put just the keyless chuck on my regular 1/2" drill, and I used the SDS adapter shaft on a keyed chuck for use with my hammerdrill. Easy to mount this chuck, and easy to use. In my opinion, this is the best keyless chuck I have ever used, and I have used many many others of different brands and sizes. Can't go wrong with the quality and design of this chuck, and having the SDS adapter shaft is a great tool to have on hand as well.

Produto de fabricação robusta, preciso, acabamento primoroso, materiais de primeiríssima qualidade, superou completamente as minhas expectativas. Eu recomendo fortemente.

Serrage efficace

Even though this chuck is branded Bosch I seriously doubt the credibility of same. After a few weeks of normal use it basically fell to pieces and gave up. Had much better use out of unbranded and much cheaper chucks. Save your money and don't purchase this piece of garbage.

Turns hammer drill into one able to use plain drill bits. Works really well.

Ottimo