Hard chrome plating inside the cylinder

A. It would take a small book to answer your question.
You will need an anode down the center of the bore that is about 25-30 mm in dia. It should be made of a lead alloy mat. It needs to be fixtured very well with no contact with the part which will be negative. You probably should wrap the anode with paper so that the anode does not touch the bore when loading the anode/part, and then remove the paper.
ID plating will generate trivalent chrome, so I would use a small porous pot to keep the solution fresh.
There is a lot more, and a consultant (qualified) would be a good idea. If not, read a couple of books on chrome before you buy the first item.

A. Dear Mr Nigade,

I suspect that your plating bath is contaminated with solid particles that tend to go and sit at the inner corner.

Please cleanse the bath and anodes thoroughly once over and try.

A. I'm not doing chrome plating. But from my observation, your parts have a deep hole. You may need additional anode inside the hole. Please be careful to not contact with your parts.

Also, please try to remove bubbles during plating. Racking position is important, so that bubbles can come out easily from the parts.

Thank you

A. Hi.
To hard chrome inside the anode should be very close to the cathode area, 4-5 mm. To avoid gassing streaks from the plating procedure.