Thread: lubrication

Here is one to give you some ideas
CNCCookbook: IH Mill One Shot Oiling

I see you posted up on CNC zone as well. If you do a search through their you will find a few current threads on machines that have been converted.

Dave

Thanks Dave

Yep posted on cnczone so I post here to try and get some answers.
look at the link you gave very interesting
Still there is no answer to my question of how the oil gets the ways and dovetails.

What i do not like is all the values and not knowing if the oil is actually going to the bearings one spec of grit and those values would stop working I feel

Russell

The valves are numbered and each larger number will give out twice the amount of the one under it. Having a lot of small holed valves lets all the points get equal oil supply. As for grit getting they have filters in the pump to stop this happening.
The oil gets into the ways usually with drilled holes at right angles and the ways have a slot machined in them to spread the oil along the ways.(as shown in the link)

Dave

Hi
Dave I understand how the oil get to the flat part of the ways what I do not understand is how the oil get to the dovetail and gibs.
When you look at the link you will not find any oil slots on the dovetail part of the ways only on the flat ways. So if I am going to the trouble of stripping down the mill and putting a oiler in. My question is should I be putting oil slots on the dovetail and gibb?
Have read where other machines do have them but nowhere on these forum have I see it mentioned. Why is this so?

This one shot system worry me been one pump the oil will always find the path of leased resistance which means there always a possibility that one or more parts are not getting enough oil. the other thing is it delivers a whack of oil with each shot with long period between with nothing. This can not be good!

Not sure what your concern is when reffering to the whack of oil delivered with each shot with long period in between with nothing.

If the displacement of the pump is Greater than the capacity of the Oil lines and Greater than the delivery rate of the Metered valves there will allways be oil in the system.

The system requires pressure to deliver oil to the Metering valves,as the pressure reduces due to the oil being delivered the oil stops going through the Metering valves untill the System is pressurised with a New load of oil.

pipeclay
Take a bearing say on the z axis angular contact bearing (mine have no covers on the bearings), it gets a shot of oil in to it which at the time of injection is stationary. Most of that oil will run out of it pretty much straight away. Some will be there for a while but if am doing a lot of z axis work how long will the bearing be protected?
I am using a home made gravity method and it delivers about 1 cc per hour continuously this is good from my understanding of lubrication. Think of you car how long would it run with out continuous oil flow.
So I am thing about some thing with a continuous oil flow would be good would you not agree?

Any thought on the gib lubrication question

Russell

Is this a Manual Mill/Drill or some sort of CNC.

a H/F hm 45 mill converted to cnc

The SLR system will continuously supply oil to all points and the quantity will depend on what size valve you use one each one.
You will push the handle when you start and when it returns you have to push it again each time it does it. If you think you will forget or don't want the hassle buy an automatic electric pump.
The dovetails are usually oiled by having the centre slot in the ways continued over to the edge in the centre like in this link below.
https://www.woodworkforums.com/f65/hm...ml#post1149793

Have a look around this site, it has a lot of info
Bijur Delimon Automatic Lubrication Systems : Home

Dave

So Dave these one shot pump works by you load a spring and it pushes the oil out through the restriction values? So you could have it supplying oil for half an hour say depending on value setting and pump size.
What is the normal time that it would run for?

Russell

Originally Posted by rusel

So Dave these one shot pump works by you load a spring and it pushes the oil out through the restriction values? So you could have it supplying oil for half an hour say depending on value setting and pump size.
What is the normal time that it would run for?

Russell

Thats the way they work. It will depend on how many and how big of valves you have in the system to how long it lasts. It will not need to be run continuously, a few pumps a day should be enough to keep it lubed. It only needs a thin film, if you give it to much most will end up waisted and in the tray.

Dave

Thank for clearing that up Dave I had the wrong idea on how there worked.
With that in mind I still like the peristaltic pump method, Why
A; I have most of the materials here to make one here
B; love a good project
C; I think it will delver a better lubrication to the mill
D; Will know if any lubrication point is failing
E; Will work out much cheaper for me to make then buy

But do I add a oil points to the gibs and dovetails??????

any one got a good local source for the metering devices?

attached is a sketch of what I was thinking