BOSCH3-Jaw Keyless Chuck with SDS-Plus Shank, 1/2-Inch HA3JAW

Q: Can this be used for hammering (chisel), rotory hammering (bit)? Using regular bits and chisels,

I can't speak for the keyless version of the Bosch 1/2" chuck adapter. But I have the keyed version of Bosch's 1/2" chuck adapter! The keyed version, employs a a special chuck body with a sliding shank, that (like an SDS chuck,) transmits the percussive energy directly into the back of whatever tool or bit is installed in the Jacobs chuck. I used my adapter to fit a 30" x 1-3/4 bulb auger, into Dewalt's 18volt SDS+ roto hammer. Then used this combination, for several days, in the rotor hammer mode, without a failure. (A roto hammer fitted with a bulb auger, is my tool of choice when the task is the extrication of woody shrubs, and their gordian root systems!)

Q: Which is better, Bosch key or keyless construction?

Keyless is better specially if you start drill and forget key is still in the chuck

Q: Is the SDS Shank removable? Does the chuck loosen when operating in the opposite direction or is there a flat spot to lock the chuck on the shank?

Yes, it locks in place just like a bit would. Works great, I used it to mix mortar for 2K feet of floor tile.

Q: How do you lock it into position so that it is not moving up and down?

Thank you for your question. The HA3JAW adapter works the same way the SDS-Plus bits work. They lock into place in the chuck. If you have further questions please feel free to contact our Bosch Customer Service Representatives at 1-877-BOSCH-99 (1-877-267-2499).

Product ID: 78118455

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Details

Brand
Bosch
Material
Alloy Steel
Item diameter
0.5 Inches
Item weight
0.01 Ounces
Compatible devices
Drilling

🔩1/2-inch thread size

⚙️Keyless ratcheting for quick bit changes

🛠️Steel metal sleeve for rugged durability

Frequently Bought Together

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

WORKPRO 17-Piece SDS-Plus Rotary Hammer Drill Bits and Chisel Set, Carbide-Tipped Masonry Drill Bits and Chisels for Concrete, Stone, Brick, with Storage Case

Makita B-59259 Adapter, SDS-PLUS to 1/4" Hex

Description

🔧 Unlock your drill’s full potential with Bosch’s keyless power!

BUILT TO LAST - Steel metal sleeve ensures maximum durability on tough job sites
PRECISION DRILLING - Designed for rotation drilling in masonry, brick, and block with 0.5-inch capacity
EFFORTLESS BIT CHANGES - Keyless ratcheting locks drill bits instantly—no keys, no hassle
UNIVERSAL COMPATIBILITY - Fits all Bosch and competitive SDS-plus rotary hammers seamlessly
OPTIMIZED FOR DRILL ONLY MODE - Engineered specifically for SDS-plus rotary hammers in drill-only operation

The BOSCH 3-Jaw Keyless Chuck (HA3JAW) is a 1/2-inch, SDS-plus compatible drill accessory designed for quick, keyless bit changes. Built with a rugged steel sleeve, it supports rotation drilling in masonry and brick, fitting all Bosch and competitive SDS-plus rotary hammers for reliable, durable performance on professional job sites.

Specifications

Thread size	1/2 inch
Capacity	0.5 inches
Included components	Unit^Instruction Guide
Global Trade Identification Number	00000346393200
Manufacturer	Bosch
UPC	000346393200
Part Number	HA3JAW
Product Dimensions	18.54 x 5.84 x 4.06 cm; 0.28 g
Item model number	HA3JAW
Size	1/2-inch
Colour	Standart
Style	SDS Plus to 3 Jaw Chuck
Power Source	Hand Powered
Voltage	120
Item Package Quantity	1
Cutting Diameter	0.5 Inches
Batteries included?	No
Batteries Required?	No
Item Weight	0.28 g

Have a Question? See What Others Asked

Can this be used for hammering (chisel), rotory hammering (bit)? Using regular bits and chisels,

Which is better, Bosch key or keyless construction?

Is the SDS Shank removable? Does the chuck loosen when operating in the opposite direction or is there a flat spot to lock the chuck on the shank?

How do you lock it into position so that it is not moving up and down?

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