Z axis set screw

[ChrisFleeger]

I have lost my z axis set screws and need to replace them asap. Any idea what size i would look for in the hardware store?

[HaldorLonningdal]

M3 is what you need.

[SamCampbell]

I previously had that problem. I would suggest taking the pulley to the hardware store with you. My local Ace Hardware didn’t have the M3 set screws so I had the guy in there tap the holes to M4. I also change the length of the set screws to 1/4" or 3/8" I believe. That way I can tell if the set screw has become loose or falling out. PS, remember to use some blue Loctite.

[EdgarHaase]

See the info and links in this post:

Z drive isn't going up and down smoothly

Grub screws don’t have a head, so double check that they are not loose in the hole but below the surface. [20180925_155432] The screws are M3 (aka 3mm) with a 0.5 thread pitch. They can be 3mm to 6mm long. Inventables does not sell the screws alone - they come with their pully kits. Online, you’ll pay about $5 for two screws or $7-9 for a larger 50 count or assorted lot. I purchased this assortment: Amazon.com If you cannot wait on shipping, you can use short M3 screws, or cut down a longe…

[HaldorLonningdal]

@SamCampbell

Good you mentioned that, retapping to M4 makes it a lost stronger. Longer screws too.
Loctite is golden (blue formula)

M3 in the US isnt that common in general hardware stores, if one have a RC Model shop around they may have M3 in stock.