Milwaukee chucks

[rick carpenter]

Does anyone know if a M18 Super Hawg's 7/16" Quik-Lok chuck fits on the spindle of a keyed 1/2" 3107 RAD? The current Super Hawg has the same 38-50-0027 spindle for its keyed and Quik-Lok chuck versions, but the 3107 and Super Hawg have different 1/2" keyed chuck parts numbers. It's possible they're the same 1/2-20 threads but I don't know.

I emailed Milwaukee asking about the possible swap even though I pretty much knew they'd never let that cat out of the bag. Anticipating that, I also asked what threads sizes were used on their spindles. Their answer was "Thank you for your email. I went to engineering to attempt to get drawing specs for the spindle and output shaft and I was not able to get that proprietary information from engineering. Unfortunately, I am not able to provide you with the thread specs that you are requesting."

 

[paulsomlo]

Does anyone know if a M18 Super Hawg's 7/16" Quik-Lok chuck fits on the spindle of a keyed 1/2" 3107 RAD?

I don't have first hand knowledge, but looking at the drawings, I'd say no. The spindle on the Super Hawg has two flats which engage the Quik-Lok, while the 3107 spindle has 1/2-20 threads.

As an aside, it's not clear whether the keyed chuck for the Super Hawg engages the two flats of the spindle along it's bore. From the drawings, I'd say no - it appears that an intermediate piece engages the spindle flats, then engages slots in the top of the chuck. The interesting part of all that, is the LH thread screw that's included with either configuration of the Super Hawg. I can see the need for a screw to retain the chuck, given that the spindle is not threaded, but LH?

Here are links to the drawings:
https://documents.milwaukeetool.com/54-10-2720.pdf

http://media.repairtoolparts.com/image/2711-22-(G61A)/2711-22-(G61A)-Milwaukee-PB.pdf

 

[dogdog]

The spindle that the chuck attaches to have the same part number 38-50-0027 .... the difference is the chuck vs chuck and the spacer vs chuck hub....... no first-hand exp just looking at the drawing...

 

[rick carpenter]

Well ****! Y'all are right, the newer Quik-Lok chuck and the keyed chuck w/hub fit onto the same flatted spindle. Older Hole Hawg versions 2707-20 w/keyed chuck and 2708-20 w/Quik-Lok chuck look to fit onto the same non-flatted 5/8-16 threaded spindle... but... a RAD spindle removal tool for Milwaukee techs shows the RAD to have 1/2-20 threads.

Paulsomlo, all the chuck retaining screws I've seen are LH.

Oh well, on to other OCD-ish pursuits!