Unlock even more capability from your MR-1 CNC Mill with the Gantry Riser Block Kit. This upgrade raises the gantry 1.5 inches, providing additional clearance for taller workpieces, larger fixtures, vises, and specialty tooling.
Precision-machined from steel and designed specifically for the MR-1, the kit includes all required mounting hardware for a straightforward installation.
Important: Raising the gantry reduces machine rigidity and changes the system’s vibration characteristics. Users may need to adjust machining parameters accordingly, especially during heavy cutting operations.
Great addition, I made some a few months ago and would have happily bought them. Are you sure that is 2.5” of increase though? With the included hardware it seems like it might be 1.5” (and visually it looks more like 1.5”). The flange on the Y carriage is 3/8” tall for reference, and the linear rail is a little under 3/4” tall. This is from your product page:
When I put the risers on my machine I raised the gantry up onto wooden blocks. This allowed me to raise the gantry with only half the weight at a time. I also removed the spindle, saving a lot of weight.
@salemlakesarmory it doesn’t increase Z travel, it just moves your Z farther from the table. Z travel increase would require replacing many more parts and some redesign.
Yes, the Z clearance can be really helpful when working on taller objects.
This setup is what finally prompted me to make and install it. I was modifying a trailer hitch and clearance from the top of the hitch to the bottom of the Z rails was really tight. My machine is modified but has the stock gantry.
That is a Sherline 4th axis and a XianDin H54 vise with a mounting plate that fits onto the rotary table.
My machine is pretty highly modified, the 4th axis won’t work unless you’ve replaced CutControl with a different control system. I have other threads on my machine here if you search around.
You are absolutely correct. Thanks for the notice. That has been fixed on the website and the forum post. Miscommunication when I copy/pasted the website description.
I will definitely be doing this upgrade soon. Couple questions:
Are there any mods or fortifications that can mitigate the rigidity and vibration challenges and reduce/eliminate the need to modify operational parameters?
Also, is there a z-travel-increase mods in the works?
Just received my riser block kit. The two together equal 1.5 inches thick. So, the servo motor in the upper position and the 1.5" spacers should give me 2.5 additional height. I’m just so excited to re-tram this perfectly trammed machine.
If you haven’t updated since November 2025, make sure to redownload cutcontrol off our downloads page. It has a few fixes around the Tool Setter movement. Downloads | Langmuir Systems
The last update only fixed bugs introduced in the previous update. And that previous update broke more than it fixed. We haven’t had a real update in like 2 years, despite promises. But you’re cranking out new equipment, and a few accessories for the MR1. Just not bothering with the heart of the machine.
Its like microsoft, they update things and it breaks stuff. 24.1.1 works for me and im not changing it unless theres a major update that adds significant changes and is stable. When your business depends on it you cant have down equipment. I dont even want to get the new riser blocks because my stuffs dialed in and working but the benefits will likely outweigh the risks
Exactly the same for me! I didn’t update earlier because I was waiting to hear what people thought, and there were nothing but complaints and probe crashes. So when the fix came out without any new features, I didn’t bother with it, either.
