So we have a few different machines in our shop. One of them is the HPC Blitz 1200CMB. Pretty cool machine, I’m sure you are all familiar with it.
One of the locksmiths I work with was teaching me how to impression locks. Our first step was to use the Blitz and shave just the tiniest amount off the top of the key. You know the method, yeah? Well, for some reason, every time we went to shave some off, the key would come out with a noticeable slope on it instead of being straight and level.
We couldn’t understand why it was happening, so just continued to work on impressioning the key/lock. Today I was attempting to do this on my own, and no matter what key blank I tried, same exact thing happened.
I thought maybe the machine was out of alignment, so I grabbed a couple of SC4 blanks and used the CodeMax to cut the key with the biting 123456. I then used the appropriate Blitz card and cut a key 123456. I compared the keys and they were pretty much identical. Scratching my head, I cleaned the jaw of the Blitz and tried shaving a key again. Same exact thing happened.
I loaded another key. This time, I paid careful attention to what was happening. I’m not sure if this is by design or if there is something wrong with our machine, but when I set the depth crank to just barely touch the corner near the tip of the key and then used the lateral crank to move the key from tip to shoulder, the middle bar of the pivot arm rubs across the crank bearing for the depth crank and causes it to rotate.
I know when we normally cut the key we start at the shoulder. Do I need to do this when shaving the key for impressioning as well? It seemed that no matter which way I turned the lateral crank, the depth crank would always get turned, so I’m not sure it matters.
Any ideas on how to fix this? Does the bearing need cleaned/lubed or replaced maybe? Does the slope even matter? I sprayed a small amount of Tri-Flow on the bar where it touches the bearing and it made it feel smoother to move, but it didnt stop the depth crank from turning on its own.
Attached is a picture of three keys. The first key is just a regular KW1 blank. The second key is a KW1 that I attempted to shave. The third key is just a random cut KW1 that was duplicated on a Rytan.