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

Product ID: 388659373

Details

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

🔩1/2-inch capacity for versatile drilling

⚙️Keyless ratcheting for quick bit changes

🛠️Steel metal sleeve ensures rugged durability

€ 90.81

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Description

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

BUILT TO LAST - Durable steel sleeve designed to withstand tough jobsite conditions
COMPACT LIGHTWEIGHT - Sleek 0.28g design for easy handling without fatigue
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
PRECISION MASONRY DRILLING - Optimized for rotation drilling in brick, block, and masonry materials

The BOSCH 3-Jaw Keyless Chuck (HA3JAW) is a robust, 1/2-inch capacity drill accessory engineered for SDS-plus rotary hammers. Featuring a durable steel sleeve and keyless ratcheting mechanism, it offers fast, secure bit changes and universal compatibility with Bosch and other SDS-plus brands. Ideal for precision masonry drilling, this compact chuck delivers professional-grade performance and longevity on every job.

Specifications

ASIN	B0062ICGEM
ASIN	B0062ICGEM
Best Sellers Rank	#66,067 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #90 in Power Drill Chucks
Brand Name	BOSCH
Capacity	0.5 inches
Compatible Devices	Drilling Machine
Customer Reviews	4.4 4.4 out of 5 stars (1,952)
Customer reviews	4.4 4.4 out of 5 stars (1,952)
Date First Available	28 March 2013
Global Trade Identification Number	00000346393200
Handle Type	D-shaped, straight
Included Components	Unit^Instruction Guide
Is Discontinued By Manufacturer	No
Item Diameter	0.5 Inches
Item Type Name	Drill Chuck
Item Weight	0.01 Ounces
Item model number	HA3JAW
Lock Type	Automatic
Manufacturer	Bosch
Manufacturer	Bosch
Manufacturer Part Number	HA3JAW
Material Type	Alloy Steel
Model Number	HA3JAW
Number of Items	1
Product Dimensions	18.54 x 5.84 x 4.06 cm; 0.28 g
Thread Size	M12
UPC	000346393200
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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€ 90.81

Duties & taxes included

In stock

Sold byAmazon CyprusDelivered 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 Cyprus.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews