The FAMAG 1621 depth stop features a sealed ball-bearing cage and exchangeable guide bushings that center your Forstner (F1622, F1623, F1624, F1630, F1663, F1664) and Bormax® bit perfectly in the pre-drilled hole. As the bearing support prevents any rotation against the workpiece, you’ll avoid burn marks and scuffs—ensuring uniform, repeatable drilling depths every time 

📏 Technical Specifications

• Housing Material: Durable ABS plastic with knurled locking screw

• Guide Bushings: Hardened steel, rotatable on ball bearings for smooth, mark-free operation

• Available Bushing Ranges:

  • Ø 10–21 mm (Ø 8 mm shank)

  • Ø 22–27 mm (Ø 10 mm shank)

  • Ø 28–35 mm (Ø 12 mm shank)

  • Ø 36–40 mm (Ø 14 mm shank)

  • Ø 42–48 mm (Ø 16 mm shank) 

• Height: 65 mm overall; 44 mm depth-stop cage

• Compatibility: Fits FAMAG Forstner bit series F1622, F1623, F1624, F1630, F1663, F1664 and Bormax® counterbores

🎯 Key Benefits

• Exact Repeatable Depths: Lock in the same drilling depth across dozens of holes

• Workpiece Protection: Ball bearings eliminate friction marks on wood or laminate I

• Extended Range: Reverse the bushing to gain extra depth adjustment for deeper holes 

• Quick Changeover: Snap-in steel bushings center instantly—no tools required

⚙️ How to Use

1. Pre-Drill Core Hole: Select a guide bushing that matches your pilot-hole diameter.

2. Install Bushing: Slide the steel bushing onto the ABS collar until it clicks into place.

3. Mount on Bit: Push the assembly onto the bit shank; secure with the knurled collar screw.

4. Set Depth: Rotate the depth-stop cage to the desired position and tighten firmly.

5. Drill: Begin drilling; the ball-bearing guide will roll smoothly against the surface, stopping at the preset depth.

6. For Deeper Holes: Flip the bushing around to extend travel before re-locking the stop.