Dog River ToolsMilling Machine Tramming Tool, Spindle Squaring System, Adjustable

Very fast delivery, excellent tool! I had to machine two inserts because I have metric sized indicator gauges but no problem.

The mounting screws are too short. Get a longer M3 screw to mount your dial indicator. Use 1 dial indicator to be absolutely sure of accuracy.

I have read other reviews on this item. It's just a tramming bar. If you don't know how to use one have someone show you how. It does function as intended.

I purchased this tool and two digital indicators for it to tram my Bridgeport clone knee mill. I was able to get the mill dead on with the tool. The thing I didnt like though was the screws to clamp the dial indicators were too short, and one wasn't even threaded. I replaced them with two M3-0.50X16 cap head screws which worked great.For greatest accuracy, I used the outer most holes for the indicators. I initially got the reading to 5/10,000th indicated without too much fiddling. With care, I was able to get the mill to 0/10,000ths indicated over the length of the tram bar (about 10"). That's close enough for me.

Really like the ability to adjust as I have a mini mill. Will recommend to others

CHEAP,POOR QUALITY

Used it to Tram my CNC Router. Was very easy to mount and read. Must have a good dial indicator to go with it

The thing that attracted me to this tool was that the gauges could be situated about 6 inches apart. The wider, the more likely to be accurate. Certainly, the mounting is rigid enough to give a high degree of accuracy. My setup requires a 1/4" shank. This tool comes with both a 1/4" and a 1/2" shank. I was impressed.The Cons? My setup is fairly small, and the Z axis of my CNC has limited range. Unfortunately, the gauges I had were of the thin stem variety. To mount the gauges as they came, I would need to mount the guages by the top stem. The mounting holes are large enough that the thinner bottom stems don't engage the thumbscrew. And if I use the top stem, the setup is too tall to use in my CNC. I'd love to have a couple sleeves or bushings included so that I can use the thinner bottom stem of the gauge. At this time, I am using shim stock to hold the gauges in position. I have a single gauge with the thicker stem and that does fit properly. So it is not really a fault of the product. But two sleeves or bushings would have made a huge difference.