Cup for hydraulic post knocker

[Quattromike]

I'm not sure the metal used for these parts is all that easy to drill and machine

 

[DaveDCB]

Couldn’t you thread the end of a broken breaker pin and tap a cup? Need a fair size bit of kit to be doing that obviously

 

[Giles]

This is my one, 5”

 

[Mick-the-fitter]

Now I'll be spending the afternoon trying to work out in my head what the forces could be, sledge on 10mm dowel pin versus 10,000 psi

How much are you worth an hour? Versus how much is a new post cup!

 

[Canal Navvy]

How much are you worth an hour? Versus how much is a new post cup!

Public service for our other halves, while we're thinking about broken breaker cups we are keeping out of mischief in their eyes

 

[Mogman]

Just blow it through with a burner with a big nozzle simple

 

[Stroppymonkey]

This is my one, 5”

Got mine last week. Awaiting the rammer having a side bracket fabricated. Mr Peacock says 4 inch is enough on the rammer as if you get the cup off centre you will break it. Let's see!