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!)

Which is better, Bosch key or keyless construction?

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

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.

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).

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BOSCH HA3JAW 1/2 In. Keyless 3-Jaw Chuck with SDS-Plus Shank for Use with Straight Shank Drill Bits

Product ID: 2375173

Details

Brand
Bosch
Compatible Devices
Drilling
Item Diameter
0.5 inches
Item Weight
0.27 g
Material
Steel

🔩1/2-inch capacity for versatile bit sizes

⚙️Keyless ratcheting for rapid bit changes

🛠️Steel metal sleeve ensures rugged durability

Bs.1438

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Description

🔧 Unlock your drill’s full potential—fast, tough, and ready for anything!

BUILT TO LAST - Steel metal sleeve construction means this chuck can handle the toughest jobsite demands without faltering.
SEAMLESS BIT SWAPS - Keyless ratcheting locks bits instantly—ditch the chuck key and save precious time on site.
EFFORTLESS OPERATION - Designed exclusively for drill-only mode on SDS-Plus rotary hammers, maximizing efficiency and control.
UNIVERSAL COMPATIBILITY - Fits all Bosch and competitive SDS-Plus rotary hammers—your go-to chuck for every project.
PRECISION MASONRY DRILLING - Optimized for rotation drilling in masonry, brick, and block—get professional results every time.

The Bosch 3-Jaw Keyless Chuck with SDS-Plus Shank (1/2-Inch HA3JAW) is a durable, steel-sleeved drill chuck designed for quick, keyless bit changes on SDS-Plus rotary hammers. Compatible with Bosch and competitive brands, it excels in masonry drilling and ensures secure, efficient operation in drill-only mode.

Specifications

ASIN	B0062ICGEM
Best Sellers Rank	#74,354 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #38 in Power Drill Chucks
Brand	Bosch
Brand Name	Bosch
Capacity	0.5 inches
Compatible Devices	Drilling Machine
Customer Reviews	4.4 out of 5 stars 2,024 Reviews
Global Trade Identification Number	00000346393200
Handle Type	keyed
Included Components	Unit^Instruction Guide
Item Diameter	0.5 inches
Item Type Name	Drill Chuck
Item Weight	0.27 g
Lock Type	Independent
Manufacturer	Bosch
Manufacturer Part Number	HA3JAW
Material	Steel
Material Type	Steel
Model Number	HA3JAW
Number of Items	1
Thread Size	1/2 inch
UPC	000346393200
Unit Count	1 Count

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Bs.1438

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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