08-13-2015, 09:06 PM
Made a new piston for the one-shot oil pump on my milling machine.
The original piston had two fiber cups placed back-to-back between a couple of round nuts that screwed onto the piston rod. The cups had shrunk, they disintegrated when handled.
I got hold of a couple of square-section O-rings to suit the bore and made a bronze piston with grooves to suit the O-rings.
The piston sat for a week while I waited for a set of 1/4 BSF taps to arrive from eBay so i could cut the thread to screw it back onto the rod. The joys of working on obsolete stuff!
Loctited the piston onto the rod. With a new spring behind the ball in the intake valve and a length of 4mm plastic tube to replace the 5/32 aluminium outlet tube that had been squashed, she now pumps oil through the machine again.
The original piston had two fiber cups placed back-to-back between a couple of round nuts that screwed onto the piston rod. The cups had shrunk, they disintegrated when handled.
I got hold of a couple of square-section O-rings to suit the bore and made a bronze piston with grooves to suit the O-rings.
The piston sat for a week while I waited for a set of 1/4 BSF taps to arrive from eBay so i could cut the thread to screw it back onto the rod. The joys of working on obsolete stuff!
Loctited the piston onto the rod. With a new spring behind the ball in the intake valve and a length of 4mm plastic tube to replace the 5/32 aluminium outlet tube that had been squashed, she now pumps oil through the machine again.
Lathe (n); a machine tool used in the production of milling machine components.
Milling Machine (n); a machine tool used in the production of lathe components.
Milling Machine (n); a machine tool used in the production of lathe components.