Trying to figure out what my rack and pinion is

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I am trying to find the same rack pieces to add onto my existing rack & pinion system on my CNC.
https://photos.app.goo.gl/3KoUPY6WsXL9i1ad9
https://photos.app.goo.gl/dRVVBV4CqkQ8DmSRA
https://photos.app.goo.gl/DaYXazfzH6Vod4Ri8


I did the calculations, and this is what I came up with.

From point to point on 10 teeth there is a distance of 38mm. I did the calculation and came to a modal of 1.209578589185731

Is it 22mm tall, 25mm deep.

The teeth go \ not / if that makes sense

Pretty sure it’s a 70-degree angle.

Each section of the existing rack is 671mm long.

I couldn’t find anything with the exact modal I calucated so I figured “it’s a Chinese machine so they probably bought everything off AliExpress anyway” so I found this

https://www.aliexpress.us/item/32568...yAdapt=glo2usa

and figure 1.25 was probably what they used.

It wasn’t. It’s a courser gear and it was also slanted the wrong way.

So can anyone help me figure out what I actually have?

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Did some more measuring and the gear is 29mm OD with 20 teeth which gives me a MOD of 1.3181 and then when I measured the teeth of the rack several more times I came up with 3.745 distance between teeth which is a 1.19207 MOD. so obviously my measurements aren't right.

I'm guessing this has to be a 1MOD rack but I cannot find 1 MOD rack that is 22mm wide by 25mm high.

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And now I'm pretty sure they send me 1.5 MOD racks not 1.25 MOD as ordered so I think I have 1.25. Now I'm disputing the order with the seller but they are fighting it.

[allencncrouter]

1.25 or 1.5 mode helical rack is popualr in China cnc router ,you need confirm gear mach the rack , and Calculate pulse equivalent?+8618560201508

[elephantcnc]

You can contact us to match the corresponding rack for your machine,our technicians will help you:
Email: manager@elephant-cnc.com
Whatsapp/mobile: +86-15064026772