bmwpower said:
Yea I guess 5 HP is 5 HP...lol.
I think you'd have to stick with 7.5 HP and below though, as I don't think I've seen 10 HP single phase motors for cheap, if at all.
What about motor speed (RPM)? And frame mount type?
5 Horse power is not 5 horse power. MAny companies play games with words and numbers. Do yourselves a favor and just read the info on this sight it is an eye opener, at least it was for me.
This is from Eatons website about one of their other units. I like when a company educates you about the product not just their products. . Havent found mention yet of chinese products or if they are american made. I emailed the company so we can end the hearsay and rumors.
This pump has a displacement of 25 CFM and a free air of 19.5 CFM @ 100 PSI. Pump weighs 100 lbs. 650 RPM's -
HALF the speed of our competitors. This unit has a high CFM per every revolution that it turns. To compare it to our competition, you will take the CFM of their pump (FREE AIR or SCFM-NOT Displacement) and divide the RPM into the CFM. This will tell you the CFM per every revolution that the pump turns. This unit has 0.03 for every revolution that it turns. This is twice the CFM per revolution of most of our competition. Our competition can match our CFM, but running double or triple the speed of this pump meaning they have a much smaller compressor pump - VERY loud operation and tons of water because of the higher heat of the pump from the high speed. LOW RPM is better!!--SUPER QUIET!
We now have a way to catch these compressor companies lying about their CFM Free Air. We have a CFM Flow Meter - this checks your CFM at pressure. For example, we put this flow meter on this unit-it is cone-shaped internally. The higher the cone-shaped weight inside the meter, the more air it takes to hold it there. We opened the ball valve so that the unit maintained 100 PSI. We checked the flow meter and it was on 19.5 CFM Free Air. We put it on our units, but we also give the free air. DON'T BE TRICKED BY CFM DISPLACEMENT!!
CFM displacement is bore times stroke times RPM @ zero pressure. As you go up in pressure, your pump loses efficiency. Always base your CFM on FREE AIR at pressure - not displacement. Compressors that are claiming more air than ours -
the way to check them if they are being truthful is get their pump up time IN WRITING, then compare it to our CFM of this unit's pump up time, and you will see that most of them will not give you this in writing because it is not true! We were very curious,
so we tested a 3450 RPM, 21 amps, so-called 5 HP motor like our competition's unit. We put it on and ran the pump at 1050 RPM and within 7 minutes, smoke was coming out from the back of the motor. Our BIG 5 HP, 1750 RPM motor runs it like NOTHING!! When buying a compressor, do not buy 3450 RPM motor if the unit has a free air of 16 or more.
In cold weather start up, you will have problems in starting your pump because of low starting torque. The reason this unit has a prewired magnetic starter is because a pressure switch will not take the amperage of this motor. When you see units with no magnetic starter, or they are claiming "No Magnetic Starter Required", WATCH OUT because about the time the warranty runs out, you will be burning up pressure switches. They will not take the amp draw of a true
5 HP motor, 24.5 amps. This tells you not to buy HP, because the HP's you are getting are very untrue. This unit now includes
continuous run. This option is nice when you are
running a pressure pot sand blaster or running under heavy demands in your shop over 40% duty cycle. When a unit cycles frequently or when the unit is turning on and off multiple times in an hour, it is hard on your electric bill and your magnetic starter and your centrifugal switch in the back of a single phase motor.
Every time the unit starts, the magnetic starter is arching. The continous run will eliminate a lot of the arching from multiple starts and stops. The continuous run is used only when the unit is in a 40% or more work load. This allows the intake valves to be pressed open by an air cylinder built into the cylinder heads. It allows air into the intake valve on the down stroke of the piston, but when the cylinder is on the up stroke, the valve is held open so the air that was just drawn into the intake valve is now blowed back out the intake valve . This helps to cool the pump internally by drawing cool air into the cylinder and absorbing the heat and blowing it back out at hot air.
THIS PUMP DOES NOT HAVE REED VALVES - IT NOW HAS THE BEST VALVE IN THE COMPRESSOR INDUSTRY - DISK VALVES! Easy to maintenance - disk valves can be maintenance without touching the head gasket. They are sealed by an O-ring on top of the cylinder head with 4 bolts holding each valve in place. THIS PUMP HAS ALL STEEL CONNECTING RODS WITH REPLACEABLE INSERTS ON THE CRANK TO ROD JOURNAL AND ON THE WRIST PIN JOURNAL - not aluminum throw-away. This pump has 360 degree cooling around each cylinder which makes the pump run much cooler during operation along with low RPM.
It takes approximately 5 amps per horsepower to make a horsepower--running horsepower, NOT starting horsepower.
To be a true 5 HP motor, it takes at least 23 amps or it is not a 5 hp motor. They are giving you "Starting" HP which means nothing. It is not what you are actually getting. This motor is all copper windings with cast iron ends. This unit is wired in conduit and meets all NEMA Wiring Codes. This pump is dual belt drive.
Anything over 16 CFM free air needs to be 2-belt drive or you will be going through belts all the time. This unit also has a cast iron motor drive pulley on the motor. The reason you see one belt drive on these bigger pumps is because companies are trying to cut costs and YOU are getting LESS for your money! This unit has an 80-gallon ASME Code Air Receiver-maximum pressure of 200 PSI @ 450 degrees. Do not buy tanks that are not ASME code because this is very unsafe. These tanks are inspected and approved by ASME. Unit features:
cast-iron pump-not sleeve cylinders-solid cast iron
large oil reservoir and an oil sight glass
2 large automotive-type air filters
true 5 HP motor-25 amp, 220 Volt, Single Phase
80-gallon ASME Code approved air receiver
2 V A-Belt drive-NOT 1 belt drive
all steel 13-gauge, HEAVY, HEAVY duty belt guard-built very durable (NOT plastic or wire birdcage-type guard)
quality pressure switch, pop-off safety valves, and ball valves
a ball valve drain plumped out the front of air receiver for easy draining condensation from air receiver-NOT cheap petcock-type drain
3/4" ball valve air outlet
3-year parts & labor warranty (NOT pro-rated) on unit on compressor pump & 2-year warranty on rest of unit
Unit weighs approximately 690 lbs (shipping weight). There are companies claiming all cast iron, but in reality they have a sleeve surrounded by aluminum. The way to tell if they are cast iron is to take a magnet with you when shopping. If the magnet does not stick to the compressor--IT IS NOT cast iron...it's aluminum. This unit comes complete with Owner's/Operator's manual and Parts manual. Bid on this unit and if you come to the factory to pick up your unit and you are not FULLY satisfied, you will not be obligated to take the unit with you and we will not send a negative rating (you will only receive a negative rating if you do not show up at all.) We are that confident that you will be 100% satisfied!! Please email us with city, state, and zip for a freight quote. We give some of the most competitive shipping rates---but we do not "bump up" the unit cost and then claim "free shipping"! Residential delivery is an additional $15.00 and liftgate service is an additional $15.00. You can also pick the unit up here at our factory to save on freight-(Ohio Sales Tax of 7.5% would then apply unless you have a tax id number) We accept Visa, MasterCard, Discover, money orders, cashier's checks, certified checks, or business and personal checks. However, if sending business or personal check, unit will ship 10 days after receipt of check. **PLEASE NOTE: When sending in payment for compressor, please include the following information with payment: Name, Business Name (if applicable), ship-to address, itemized list of what you have paid for (description of unit with amount, freight and additional services (if applicable). This helps our accounting department and ensures the correct unit is shipped since many are being shipped daily. If you have any questions, feel free to email us or call Matt Cain, Owner-Eaton Compressor at 937-456-1752. We offer the best factory service & warranty in the industry and have all parts in stock if you would have a problem - ready for next-day air shipment. Thanks for taking the time to
