Toymaker's latest activity

I finished machining the vale plate today; this part holds all 18 valve balls and their springs. I machined one surface on my lathe and...

Progressive cavity pumps have been around oil field service for a long time, both surface & downhole. Downhole sand cuts can be ~35%...

And wiki informs me that they even reach 400Bar(!) With hydraulic driven piston pumps. So probably a great place to start looking for...

Amazing !! Sludge-Kat can pump 2.5" diameter nuts, bolts, and rocks!! That thud sound you heard was me falling out of my chair !!

I'm no expert but my guess is that for a mixed media slurry pump they probably use wear resistant valves like TPU or castable Urathane...

This one uses pistons, not plungers, and huge ball check valves.

Ruben's post #10 translates to "sand, water, and clay sludge". When I think of sand, I imagine pumping water with beach sand in it...

I don't believe you can use a piston pump to move a water + sand + clay mixture. The only pump likely to survive is a Tesla pump.

I'm pretty sure the sand in the mixture ruben needs to pump will destroy a gear pump rather quickly. Best to look at centrifugal or...

Google translates to "bomb mud",...I don't know what that might mean. Many home use pressure washer pumps will reach that pressure.

Good call on oil vs grease. Besides lubrication it will help cool, flush debris, help the o rings seal and so on.

Thanks ! Yes. Although it doesn't have much run time to date, the swash plate shows no signs of wear. That may change once the entire...

In the previous feed pump design the swashplate was stationary and prevented from turning within the housing, and therefore didn't need...

The swash plate angle was machined on the milling machine. I clamped the round brass stock along the X axis, raised off the milling bed...

The thrust bearing is a plain, garden variety stainless steel bearing. The redesigned housing should allow me to maintain an oil pool...