Greasing Hiwin HG15

[EddyCurrent]

I've had a search about but nothing much to find, here's the problem;

Hiwin HG15 bearings come with a poxy little domed grease nipple, they have a M4 x 0.7 thread, I have a grease gun and grease but what fitting do I need to get grease into them ?

[Jonathan]

Not sure what fitting they're meant to take, but in the recent build I just made my own adapters to fit in the thread (M6x1 in my case) and routed tubes to each bearing (and ballnut) so oil can be injected into them. Arguably a bit OTT... it depends how far you want to take it and how easy access would be to the existing fittings.

[EddyCurrent]

I've decided to use grease but that's what I'm thinking, make some adapters. Quite a lot of the large motors I've worked on had extension tubes for the grease nipples because they would have been inaccessible otherwise. It's a daft design on their part I think, if only they were 6mm instead of 4mm. I'm thinking about a right angle adapter made of brass with a 4mm male thread and a 6mm female to take a standard nipple.

[EddyCurrent]

But I didn't want to say that, I want to know what other people do with regard to greasing these and how ?

[johnsattuk]

used 4mm nylon elbows which were a push fit into the carriage

[EddyCurrent]

Looks tidy and good access to nipples, got a source for these elbows ? I can only seem to find pipe thread fittings.

[johnsattuk]

Hose Fittings 4 - 4mm Barbed Hose Elbow Connector Blue Nylon | eBay
Tefen Elbow Hose Joiner (Nylon/Plastic) | eBay
90° Right Angle Elbow Connector- Barbed Nylon PA66 Joiner for Tube Pipe or Hose | eBay

[JAZZCNC]

Looks tidy and good access to nipples, got a source for these elbows ? I can only seem to find pipe thread fittings.

Try these blokes they are excellent for things like this. I can't see any on sight but I bet they will have or will get you some.
http://airaccessories.fluidfittingsshop.com/

[davethefixer]

Thanks for the info on the grease nipples guys.
Does anyone know what is the best type of grease to use in these linear rails ?

[EddyCurrent]

Thanks for the info on the grease nipples guys.
Does anyone know what is the best type of grease to use in these linear rails ?

This is the one I use, it's the right stuff at the right price.

http://www.toolstation.com/shop/Auto...0/sd180/p89691

Also read this thread

http://www.mycncuk.com/threads/4862-...3206#post33206