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You dont need a dealer to buy a PTO pump. They are readily available online in a wide range of sizes. I suspect you need the smallest you can find. Dab

Every machine I have starts and reverses using the OEM contactors. This machine is 30+ years okd and was used in a poiduction shop at Corning for the first 20. It still works flawlessly. Trying to rewire it to use inverters wiuld be an incredibly expensive waste of time. Dan

I believe the only thing inside his Phase-A-Matic box is a start cap and potential relay that kicks the motor off. There may be a front panel switch to select direction. After that T3 is dead. A picture of whats under the hood would be revealing. Dan

Good point but he does not have an inverter. He is running his motor on single phase from the mains. How do you feel about that :rolleyes: Dan

All the switch is doing is reversing the L1/L2 (aka T1/T2) motor leads. Isnt the switch on the mill? Dan

In simple words it means UDT is "thinner" in the pail than conventional sae 80 gear oil but thins out slower as it warms up. By the time borh oils reach 100C they both have the same viscosity. It also means that at even higher temps the UDT is actually thicker. Simple enough for you? Dan

It applies because at the contact points where gear oil does its work the localized oil temps are well over 100C. Dan

All true but it misses much of the original posters thoughts. Also true is the viscosity of SAE 80 gear oil is [7 - <10] cSt @ 100C. That puts SUDT2 dead in the middle of SAE grade 80. Regular UDT is a bit "thicker" and both are more than adequate for wear protection. IMO the proper way to...

Resistance is futile....

At We are making too much of this. The "sensitive tapping" option on my mill will power reverse all day long with nothing more than a lever mounted pushbutton switch. In most cases I reverse it multiple times per hole. Dan

It wont work at all in series. Dan

Despite your visual perceptions, when you measure the actual viscosity of UDT it is a SAE grade 80, API GL4 gear oil. So I vote NO, you are not smarter than the engineers who know that. Dan

Buy a generic pump. Dan

And I am just the opposite. :) i also do some pretty heavy cuts so I need full motor power. Dan

Know the difference Here us a duagram showing the basics of a motor starter, true static phase converter, and a RPC. The starter is just a $10 start cap that momentarily bridges L1 or L2 to the third 3 phase leg. That starts the 3 phase load motor and then drops out leaving the load motor...

If the motor is 400/240V dual voltage capable there will be a wiring box with six possibly nine leads and wiring diagrams for selecting which voltage you want. 400 V wiring will be Wye and 240V wiring is delta. Do not confuse this with a Wye service entrance from the POCO. Just that simple. Dan

Phase-a-matuc is quite ckear - that is a motor starter and does not produce 3 phase power. Your 3 phase motor is running with a total phase loss. In an industrial machine that is considered a serious power fault and a VFD would shutdown the system to protect the motor from damage. Dan STARTS...

You can.build a 2 HP rotary phase converter yourself using a used 2HP 3 phase idler motor and a handfull of capacitors. Its cheap, provides clean 3p power and full load motor HP. Just plug the Bridgeport in and it will operate exactly as it was designed. Did you get one with a variable speed...

In the class of motors abd inverters we are talking about an inverter produces 3 phase output. Period. You only need one to convert 240v single phase input to 240v 3 phase output. If your machine has mulltiple motors and you want to use the inverter to CONTROL each one separately you need...

Raise the lift to full up. Adjust length of linkage until the pump is no longer deadheaded. Dan