I finally got tired of the way the Carriage Lock operates on my Mini-Lathe. A little background: shortly after I got a Carriage Lock from Little Machine Shop, I modified it (of course) – as designed, it mounts to the Carriage using the holes intended for a Follower Rest (and Yes, I replaced the clunky re-positionable lever with a smaller one soon after I did the original installation):
It was better than nothing, but couldn't be reached if you were working close to the Head Stock; plus I wanted to use those holes for a Swarf Shield:
The shield on the left has embedded magnets to hold it against the Head Stock and a "wiper" that the shield attached to the Carriage passes under. I made several sizes of the Carriage-mounted shields to suit varying length workpieces. To make this possible, I modified the Carriage Lock and moved it to the other side of the Carriage:
This worked well, but due to the Gib Adjusting Screws (and an M4 Hex Screw I use in an added tapped hole to lock the Cross-Slide) there wasn't room for a lever, so I substituted an M6 SHCS. The only issue with this was when I was using a center in the Tail Stock the SHCS was blocked. On even slightly larger lathes there is the possibility of adding a lock in the Apron area, but not a lot of space on a Mini-Lathe, so I put up with what I had. A couple of weeks ago I thought of an answer, and finally made it this morning:
1144 Stressproof: M6-1.0 on one end, a 3mm thick shoulder and a 5mm hex on the other; paired with an inexpensive 5mm, 12-point combination wrench and Voila:
The Carriage goes from free moving to locked with just a flick of the wrench!
This was my first experience with 1144: it machines beautifully, even on my Mini-Lathe & Mini-Mill. However, it made me remember why I like working in Aluminum & Brass: Cutting Oil, Hot Chips & Magnetic Chips – it takes three times as long to clean up!!