Heidelberg Windmill: oil or grease on the motor pulley?

Hello guys,
I’ve finally got a new motor for my Windmill. I inserted the pulley on it and re-mounted the big spin.

At the end of the pulley there’s a yellow “port” like in the rest of the Windmill. I don’t know if I must use grease or oil.

I was thinking to use grease because with oil I’m afraid it reaches the belt, when the mechanism of the pulley opens itselft, however in the manual I can’t find any direction about this.

Thank you!

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If the nipple fits into the oil gun, then it’s Oil.
If the pointed end of the grease gun fits into the nipple then it’s Grease.
The above applies to all Heidelberg machines.

Hello Bern,
the Windmill has got a grease gun and an oil gun? For what I know it has got a simply the oil gun.


I’m only familiar with the Heidelberg cylinder, which has both raised oil nipples and recessed grease fittings. I note that the manual for the Heidelberg platen says that the variable speed drive pulley is greased with a grease gun, and that is how it is on the cylinder.

are you speaking about the Windmill operation manual? If yes, what’s the page?


On page 15 the manual indicates the variable speed pulley should be lubricated with grease.


At least on my manual on page 15 indicates no grease should be used to lubricate the oiling point with nipples!

I don’t know what edition you are reading but on page 15 of mine it says, “In no case should grease be used in these nipples, with the exception of the variable speed pulley. […] For lubrication of the variable speed pulley a grease gun is provided.”
The Heidelberg grease gun has a conical point and is easily distinguished from the oil gun used on the nipples. The oil gun and nipples confuse some here in the US because they are very similar to Zerk grease fittings.

Mhmh, the only grease point I can see are the 2 green points where there are the bearings of the rollers.

On the cylinder, the pulley has a hexagonal extension along the axis with a grease port on one face. You can only see it when the pulley is rotated to the correct position. Then you see a slight depression, which is the grease port. It is closed by an internal ball-bearing under spring pressure, and the pressure of the grease gun pushes grease past the ball-bearing.
There may be hardened grease behind it if you haven’t cleaned it internally. With other kinds of fittings you just pump in the grease until fresh grease comes out of the bearings, and then clean up. I’m not sure where it will go in this case, and you don’t want grease being thrown where it can’t be cleaned. And a pulley will throw grease.