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Remove Large gear from shaft - damaged key
It's all gone quiet for now. Bob -
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Latest single to 3 phase vfd’s? 15-20hp?
Look at the current rating for the motor and make sure your VFD can supply that current level using single phase supply. You can probably ramp up the start to minimize starting current. A compressor is a pretty well defined constant load, whereas a lathe or mill depends on the feeds and speeds,- Overland
- Post #20
- Forum: Transformers, Phase Converters and VFD
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Latest single to 3 phase vfd’s? 15-20hp?
Tell us more about what you are trying to achieve. I run a 12.5 hp lathe off a 15 hp VFD, fed by single phase. In theory my VFD is not rated high enough, but it works fine as long as I watch the amps. Bob- Overland
- Post #2
- Forum: Transformers, Phase Converters and VFD
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Remove Large gear from shaft - damaged key
I was thinking that. Maybe no need, but ....... Bob -
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Remove Large gear from shaft - damaged key
Bonfigliori Riduttori Reducer TA125 So now you know ! Waiting for guy to come back to me. Bob -
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How much could I lift?
Lifting beams/systems are generally calculated to lift a load within a certain allowable amount of deflection. Maybe something like 1:360, can't remember exact numbers, but something like that. Glue and nail plywood to each side of your trusses, with edges touching, or sister up trusses with...- Overland
- Post #14
- Forum: Material Handling and Rigging
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Belt Drive theory and basic knowledge ... for a practical example
This might help you: https://docs.rs-online.com/5016/0900766b8002d3b7.pdf -
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Remove Large gear from shaft - damaged key
The gearbox is disassembled now. The grinder is a drum with teeth on it that cut against an anvil, I believe. Apparently PLC controlled; the PLC senses load and auto reverses to protect system. Obviously something dropped in and stalled the grinder. It might be possible to just reassemble the... -
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Remove Large gear from shaft - damaged key
I don't know what material the gear is. Bob -
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Remove Large gear from shaft - damaged key
I believe the shat extends out the other side of the gear several inches. Drilling out the key also may not be an easy task. If I'm understanding your thoughts correctly, the gall is almost akin to a weld. So any gall present would increase the amount of force required to push the shaft out... -
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Remove Large gear from shaft - damaged key
Agree completely. Looking for some insight from those with more experience. Bob -
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Remove Large gear from shaft - damaged key
Yes I was figuring no choice but to put it on a big press; just no personal experience with anything big, and damaged like this. -
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Remove Large gear from shaft - damaged key
Some good thoughts, thanks. Unfortunately the gearbox was opened up, but not protected well and there's some rust on the gears, but no obvious tooth damage. I guess I could put it in my lathe and see if the shaft is bent. I've not looked at the pinion. Yeah figured my 30 ton harbor frate press... -
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Remove Large gear from shaft - damaged key
I've been asked if I can remove this gear from the shaft. Gear is about 20" dia, 3" wide, shaft about 4" diameter, from a scrap wood grinder. Something dropped into the grinder, stalled it and turned the gear a couple of degrees and damaged the key. I don't know what the other end of the key... -
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Chrome rod v. Steady rest
My steady rest fits on one of the vee ways, so it has some basic alignment. Also has rollers; Colchester 21x80. I was thinking 350 rpm on 4" dia is too fast. And too much contact with the jaws. I found a really simple way to align the steady. Get it as close as you can, then put a center drill... -
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Chrome rod v. Steady rest
Tyrone, Are you saying the belt is held still and the shaft rotates inside the belt ? Bob -
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Wiring a VFD to a receptacle a viable option? (Bridgeport)
This is excellent information, thanks JST !! So, if a shop had a 10 hp lathe, a 5 hp compressor and a 3 hp Bridgeport clone, all 3-phase, what would the necessary rating for the VFD to run the whole shop, with switches between the VFD and motors ? If I understand correctly, 6x 10 hp, 60 hp...- Overland
- Post #22
- Forum: Transformers, Phase Converters and VFD
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SO it looks like we are getting a thread roller
I believe there are heads you can use with CNC or manual lathes for thread rolling. Bob -
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Total noob here, how do I use a VFD to run my 1HP, 3ph motor on 2ph or possibly 1ph power?
I would keep it very simple - I've done this on my BP clone. Set the VFD up in an enclosure (box) on the mill with a little 3-way toggle switch to control the VFD (low voltage). Run the VFD output up to the motor, and run a cord to a 220 volt receptacle. Cut a little window in the enclosure...- Overland
- Post #30
- Forum: Transformers, Phase Converters and VFD
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Total noob here, how do I use a VFD to run my 1HP, 3ph motor on 2ph or possibly 1ph power?
The issue, as far as I understand it, is that you don't want to take the load of the VFD by disconnecting or switching off that load. I don't see any reason why you could not wire the VFD to a receptacle and then use that receptacle for different machines. The point is you should control the...- Overland
- Post #27
- Forum: Transformers, Phase Converters and VFD