Ok so when my z axis plunges into the material there is play and the mill tip gets deflected up will this solve that?

The anti-backlash spring is a lot stronger that the original holder

I have the 3018 pro but the stock spindle diameter is 43mm. I cant find an upgrade for a 43mm diameter z axis mount. Or am i missing something here?

Hi, Firstly the image shown is for the '3018-PROVer/PROVer Mach3/MX3', not the 3018 Pro! The 3018 Pro version is available on the same Amazon page as the 3018-PROVer/PROVer Mach3/MX3, to the immediate left of the rectangular box stating '3018-PROVer/PROVer Mach3/MX3', just left click on the to the left of the rectangular box & the page will update to the '3018 Pro version of this upgrade (same price). That said, you will need to buy a 300W to 500W spindle motor with 52mm body diameter to use this upgrade & discard your existing 42mm motor. You will also require a new separate power supply to suit the new spindle motor along with a PWM speed controller to drive the new motor. I have done the above upgrade for my 3018 Pro with 300W spindle motor upgrade, & now get really good cuts & finishes from my 3018 Pro. This does involve additional expense but is well worth the investment. Regards Laurence Barron

What is the linear bearing diameter? I am looking to get this upgrade and I have 10mm stainless steel rods.

Hi, I ordered the Genmitsu Aluminium Z Axis Spindle Mount 300-500W Spindle Holder 52mm Diameter for the 3018-Pro, & its' linear bearing diameter is 10mm. In the same Amazon page as the the Prover version, lower down the description you will see selection boxes for either the 3018-Prover & the 3018- Pro versions, so depending on what CNC machine you have, simply select the appropriate box. I do not know what the linear bearing diameters are for the the Prover version, but the 3018 version are 10mm. I hope this helps.

Will it fit a mostics cnc 3018 pro

It only fits after the bottom X guide was removed , then moved down in the Z direction by 1mm. Note that the 2 parallel X bars is to hold the Z axis module. (The gap is not wide enough). I originally forced it in.(BIG MISTAKE). I had to re-drill the side support holes for the bottom X axis shaft after filling the original screw hole with glue. The glue hardened and dried, then I drilled. The 1mm increase made the Z axis module travel easily. Measure the gap (exact centre to exact centre before installing).

Unit count	1.0 count
Mounting type	Machine Mount
Manufacturer	Genmitsu
UPC	816550026601
Part Number	566005021
Package Dimensions	24.41 x 19 x 10.21 cm; 1.89 kg
Item model number	566005021
Size	V2 Upgrade version for 3018-PRO
Style	for 3018-PRO
Finish	Powder Coated
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Item Weight	1.89 kg

Genmitsu Upgraded Aluminum Z Axis Assembly V2 Kit, with Spindle Motor Mount for 775 Spindle and 300-500W Spindle, 43mm & 52mm Diameter Spindle Holder for CNC Machine 3018-PRO

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