Keyless drill chuck Makita 194079-2, SDS-plus, capacity 1 mm–13 mm

Keyless drill chuck Makita 194079-2 with SDS-plus interface is a compact accessory designed to convert compatible SDS-plus rotary hammers for use with round-shank and straight-shank bits. The chuck accepts drill bits and accessories from 1 mm up to 13 mm and allows tool-free tightening and release, providing faster bit changes on job sites or in workshops. It is intended as a replacement or upgrade part for Makita tools that support the SDS-plus mounting system and a 1/2 x 20UNF threaded adapter.

Advantages

The keyless design eliminates the need for keys or additional tools when changing bits, reducing downtime. Compatibility with SDS-plus systems preserves the hammering functionality while adding the convenience of a conventional chuck. The 1 mm–13 mm capacity covers a wide range of common drilling diameters, and the 1/2 x 20UNF threaded mount ensures secure attachment to compatible adapters and tool spindles. The product is engineered for consistent clamping and repeatable performance under typical drilling and light chiselling conditions.

Suitable for

• Converting SDS-plus rotary hammers to accept round or straight-shank drill bits
• Rapid on-site bit changes in construction and renovation work
• Light drilling in masonry, wood and metal when using appropriate bits
• Workshop tasks requiring a secure, keyless chuck for frequent bit swaps

Key specifications

• Mount type: SDS-plus to 1/2 x 20UNF threaded chuck adapter
• Chuck type: Keyless three-jaw chuck
• Clamping capacity: 1 mm – 13 mm
• Material: hardened steel jaws and body components for wear resistance
• Suitable for rotary drilling and light chiselling modes when used with compatible tools

How to use

Attach the chuck to the tool using the matching SDS-plus adapter and secure it to the 1/2 x 20UNF thread according to the tool manufacturer’s instructions. Insert the drill bit into the chuck, push it into the jaws and rotate the outer sleeve to tighten by hand until the bit is held firmly. For best results, give a final hand-tighten while applying light axial pressure; avoid using pliers or excessive force. To remove the bit, reverse the sleeve rotation to release the jaws and withdraw the bit.

Usage recommendations

Use only drill bits and accessories with shank types and diameters within the 1 mm–13 mm range. Inspect the chuck and jaws regularly for wear or damage, especially after heavy use in masonry. Follow the rotary hammer manufacturer's guidance for maximum permitted speeds and hammering use when the adapter and chuck are installed. Keep the chuck clean and lightly lubricated on moving parts to maintain smooth operation and secure clamping.