Bosch’s HA3JAW adapter is a 1/2″ keyless 3-jaw drill chuck with an SDS-Plus shank that can be used with compatible rotary hammers to extend their usefulness beyond masonry drilling and chiseling applications.
As you might know, rotary hammers with SDS-Plus chucks cannot be used with drill bits, bit holders, or screwdriver bits that don’t have SDS shanks.
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Some rotary hammers have rotary-only modes and even reversible variable speed motors, and so they could potentially be used for non-masonry drilling and driving tasks if not for the SDS chuck limitation.
Not that you would want to use a rotary hammer to replace your drill/driver in all applications, but this drill chuck adapter gives you the option to equip SDS-Plus rotary hammers with a much wider variety of drill and screwdriver bits.
User reviews indicate that the keyless chuck has a built-in locking mechanism that helps prevents bits from slipping or loosening in the jaws.
Price: $38-40
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This and other drill chucks should only be used in rotary hammers that have rotary-only modes.
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A keyed SDS-Plus chuck, model 1618571014, is also available for a few dollars more (via Amazon, via Home Depot).
Alternatively, there are various SDS-Plus threaded adapters to which your choice of 1/2″ chuck can be attached. For instance, the Dewalt’s DW5351 SDS-Plus to 1/2″ chuck adapter ($13 via Amazon) can be used with their DW5353 1/2″ keyed chuck ($30 via Amazon) to create a complete accessory. Different shank adapters are available so that the same chuck could be used with different tool interfaces, such as spline.
Michael Quinlan
I don’t really see something like this being that useful, but maybe I’m missing something. I’ve never seen a torque rating for an SDS drill, but I imagine they’re on the low side. Mine (Hitachi) has a non-adjustable clutch mechanism to prevent sudden kickback if the bit gets jammed.
richard
These chucks and adapters are great, you only have to drag one drill around on site to get lots of work done. I have a 1/4″ screwdriver/SDS attachment and i use it for screwing in window and door anchors and if i have to fit a lot of screws that are over 4″ in length.
I also use my SDS like a mains powered impact driver but I know I should’nt really
fred
There are other SDS adapters that may be of interest:
Bosch HA1030:
http://www.amazon.com/Bosch-SDS-max-Adapters-Type-Connection/dp/B0009H5P4K
Bosch HA1033
http://www.amazon.com/Bosch-HA1033-SDS-max-Hex-Adapter/dp/B000TE9EVI/
Hitachi 725792
http://www.amazon.com/Hitachi-725792-Adapter-1-2-Inch-20thread-Hammers/dp/B000M9LA3K/
Bosch 1618571014
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dtools&field-keywords=1618571014
Javier
Looks almost identical to the one dewalt has on the dcd985 if it weren’t for that light blue band. Possibly from the same manufacturer
Phil
I have a keyed version of that chuck. I use it to chuck long brushes to clean out holes after drilling as well as drill bits to make holes in framing members I just drilled holes in the floor for. These chucks are not set up to allow the hammering action to be used with non-SDS bits or attachments (the shank of the chuck is intentionally short to prevent contact with the hammer). I made up a chuck using a long SDS arbor and a typical chuck. This lasted for a while until the hammering action shattered the chuck body. Don’t do this at home. 🙂