Fellhoelter
Well-Known Member
Same machine, different attachments, and yes, that is a surface grinding attachment.
That attachment is SLICK!
That attachment is SLICK!
TW90 vertacal/horizontal grinder
- Thread starter Darrin Sanders
- Start date
PierreR
Well-Known Member
Maybe these will help...
It looks like the first large image you reference is a stand alone, custom application of the surface grinder and motor, without the main TW90 component.
[video=youtube;eKVWt2LzECE]https://www.youtube.com/watch?v=eKVWt2LzECE&index=1&list=PLE76B0F3228A58A1D[/video]
It looks like the first large image you reference is a stand alone, custom application of the surface grinder and motor, without the main TW90 component.
[video=youtube;eKVWt2LzECE]https://www.youtube.com/watch?v=eKVWt2LzECE&index=1&list=PLE76B0F3228A58A1D[/video]
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C Craft
Well-Known Member
First of all PierreR, thanks for posting the videos! I sat and watched all of these videos and I have a new respect for this machine. I have a KMG clone I built and I love it but WOW, this young fellar really put some thought into this machine. I really like some of his innovations like the belt tensioner and the ability to roll over to horizontal position.
So anyone know what one sells for with all the bells and whistles!
Has anyone got a close up pic of the belt tensioner, (I guess that would be from the left side of the machine)?? All of the videos are shot from the right side of the machine. I would love a better look at exactly how that works!
So anyone know what one sells for with all the bells and whistles!
Has anyone got a close up pic of the belt tensioner, (I guess that would be from the left side of the machine)?? All of the videos are shot from the right side of the machine. I would love a better look at exactly how that works!
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J. Hoffman
Dealer - Purveyor
I think the picture that Tom Watson posted of his surface grinder is Travis's surface grinder attachment on a homemade grinder. The TW90 comes with a 2 hp and VFD drive, an 8" contact wheel, a platen and a rotating small wheel attachment (but no small wheels). The price is $3400 I think. It seems like a lot of money, but if you were to price a loaded KMG and also a loaded horizontal you would be in the same price range,and would take up more space.
The belt tension is done by a ratchet system. Very quick to change belts, and you can adjust the tension easily and quickly. The grinder rarely needs tracking adjustments, even when switching tool arms or belts.
The belt tension is done by a ratchet system. Very quick to change belts, and you can adjust the tension easily and quickly. The grinder rarely needs tracking adjustments, even when switching tool arms or belts.
Smallshop
KNIFE MAKER
Surface grinding attachment is $1500 with 9" magnetic chuck, $1700 with the 13" magnetic chuck. So if you are getting all the bells and whistles you'd be over $5K on the whole rig.
The belt tensioner is a simple ratchet system with a release lever on the same arm that tensions. Very easy to use.
The belt tensioner is a simple ratchet system with a release lever on the same arm that tensions. Very easy to use.
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tomwatson
Well-Known Member
Yep, those are my pictures of the surface grinder. I was off line for a while trying to get my meds right and recovering from an offstate condition and did not see the posts asking about the surface grinder. I put the surface grinder on a stand with a PM motor and PM controller. I also made the stand so I could slide the grinder in or out so I could use both 2.5" X 48" belts or 2.5" X 72" belts. Phoneix Abrasives makes the 2.5" wide belts for me in varying grits. The mag chuck cannot be turned on and off like the regular surface grinders. You just pull the blade off, clean the chuck, and flip the blade to its other side. No, the grinder will not dislodge the blade and sling it at you. For accuracy test, I used a blank for a 4" folder, made sure I had it flat by checking it on the surface plate. I put the blank on the surface grinder, put on a 220 used belt that still had some bite to it. Started grinding one side and quit when the grit marks were uniform. Flipped the blade, started grinding, and completed grind. I took the blank off, de-maged it, and checked thickness of the blank. Checked every half inch all the way around the blank, and from starting out at about .1362, I ended up with .1315". Was it close? Yep. It was the same all the way around with no variations over .0005 (5 ten thousandths). Since then I have used it several times and it has always given the same results. I don't run it fast because you do not need to. Considering the cost of PM motor and PM controller, I have $2100 in it. But, this is a versatile grinder. I can take the surface grinder off and put a horizontal small wheel attachment on it that has wheels to fit that measure from .500" up through .750", 1.00", 2.00", and 3.00". I can putt a 9" disc on it, also. Every attachment can use either the 48" belts or the 72" belts. So from that point it is several grinders in one.
Smallshop
KNIFE MAKER
I like that you ended up with a dedicated surface grinder that is highly versatile for relatively little money. That is a real good idea. The main reason I bought the tw-90 was the surface grinding attachment....though, I think the whole grinder is amazingly well thought out. Eventually it would be neat to dedicate it like you have done. One less thing to change over.
Brett Schaller
Well-Known Member
I also bought it mainly for the surface grinding attachment, but it's a great general purpose grinder as well. About as smooth as my Hardcore with an 8" wheel.