Malco® Quick Connect Arbor (Carbide Tipped) – HA3

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The Malco HA3 Quick Connect Arbor is engineered for speed and durability. Featuring an industry-standard 5/8-18 thread, it fits hole saws from 1-3/8 in. to 6-5/16 in. (35–160 mm). The integrated Quick Connect system allows fast pilot drill installation and removal, while the quick release mechanism ejects saw plugs easily to reduce downtime. Designed for use in a 1/2 in. (12.7 mm) drill chuck with secure 10 mm hex engagement.

Features

Industry standard 5/8-18 thread compatibility
Quick Connect pilot drill system
Integrated quick release plug ejection
10 mm hex opening
Designed for 1/2″ drill chuck
Compatible with HH4, HH5, HHA4, HHA5 and all Malco Hole Saw models and sizes

FAQs

Q1
What size hex is the shaft of the quick change pilot drills?
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The shaft of the quick change pilot drills is 10 mm.

Q2
How do I extend the reach of my quick action pilot drills?
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Malco recommends using a commercially available Jacobs chuck to 1/4″ quick connect adapter, paired with a bit extension such as the Malco BHE3 or BHE6, to extend the reach of your quick action pilot drills.