Xtreme Fast Adaptor 1/2 in. - 20 For Hole Saw 5/8 in. - 1-3/16 in.

CMT Xtreme Fast Adaptor 1/2-in. - 20 For Hole Saw 5/8 in. - 1-3/16 in.

The CMT-550-PA01 is a quick-change adaptor (arbor) designed for CMT’s Xtreme Fast hole saw system.

Key specs & use

• Thread size: 1/2 in.-20
• Hole saw range: approx. 16–30 mm (5/8 in.–1-3/16 in.)
• System: Xtreme Fast + Push & Lock (tool-free changeover)
• Compatibility: Works with CMT 550X, 551X, 552 series hole saws

This adaptor connects your drill’s arbor to smaller CMT hole saws and lets you:

• Swap hole saw sizes fast without disassembling everything
• Use one arbor across multiple diameters
• Reduce downtime on repetitive cutting jobs

When you want this one

Choose the 550-PA01 if:

• You’re running smaller hole saws (under ~1-3/16 in.)
• Your setup uses 1/2 in.-20 threads
• You want quick-change convenience instead of traditional screw-on arbors

When NOT to use it

• Larger hole saws → you’d step up to something like the 550-PA02 (5/8 in.-18)
• Non-CMT systems → won’t interface with standard non–Push & Lock setups