{"data":{"model":{"id":"1339109","slug":"arri-anti-twist-drill-guide-for-mafersuper-clamp","name":"Arri Anti-twist Drill guide for mafer/super clamp","authorship":"author","club":false,"excludeCommercialUsage":false,"price":null,"eduProject":null,"ratingAvg":"0","myRating":null,"ratingCount":0,"description":"

A simple drill guide to add 3mm Arri style anti-twist holes to a standard mafer/super clamp.

Instructions:

Attach the guide to the clamp with m5 screws. (10-32 screws required for Matthews clamps )
Drill the 4x 3mm holes to about 4-5mm deep using a3mm bit.
Remove the guide, clear debris from the holes

The other version \u201cMafer anti-twist drill guide v2\u201d

Tools needed
Drill
No. 7 drill bit and 1/4-20 tapper tap
1/4-20 bottom tap
3mm drill bit
Tap handle

Instructions:

Ideally secure the clamp in a vise or just clamp it to secure surface.
Align the guide on the clamp
Drill out the center hole with the no. 7 drill bit. You want to go a bit over 1/4in deep. You can measure first and put a tab of tape to act as a depth marker.
Clear the chips and drill out the 4x 3mm holes. These need to be about 4 mm deep.
Using the tappered 1/4-20 tap first (it's easier to align and keep perpendicular to the surface) Tap the 1/4-20 threads until it bottoms out.
Remove the tap and clear the chips.
Repeat with the bottom tap so the threads will be deeper.
Clear the chips and you're done.

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Arri Anti-twist Drill guide for mafer/super clamp

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