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Which Grizz Mill?
December 15, 2010
7:42 PM
Zoomie
South Carolina
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My understanding is that the G0704 is an upgraded "mini mill "with a bigger table, motor and a free stand. All the G0463 ways are dovetail cut with adjustable gibs. As a personal observation, rigidity is usually a reflection of mass. The G0463  outweighs the G0704 by roughly 160lbs. Basically (in my eyes) you're getting overall less mill for the same money.

December 15, 2010
11:53 PM
ironring1
Vancouver, BC
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Nope, the G0704 and the mini mill are completely different machines.  The G0704 is a BF-20 clone, and weighs about 300lbs.  The mini-mill is Sieg X2, and weighs around 150lbs.  The G0704 is closest to a Sieg X3 (e.g. the Grizzly G0463), but is a little smaller and has a head that can rotate 90 degrees to each side (sort of like the "Super" X3).  The mini-mills can tip their column side to side, but the pivot point is at the base of the column, making is relatively impractical.

 

-Chris

December 16, 2010
8:40 AM
Zoomie
South Carolina
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After talking to the guys at  grizzly tech they indicated that the mills go: G8689 (X2), G0704 (X2 expanded), G0463 (X3), G0619 (Super X3). and now the X4 (no grizzly parallel, yet). The G0704 was a request by resellers to slot a mill between the X2 and X3. It was not a clean sheet design and "shares some design elements of the X2". there opinion? It's a grown up X2. Have I had my hands on this mill? Nope. I do anticipate seeing the G0463 and G0619 price  increasing in the very near future or possibly going away in the griz lineup.

December 16, 2010
9:48 AM
Fabrickator
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I recently bought the Little Machine Shops High-Torque Mini Mill.  It is similar to the Sieg X3 but specially spec'd by and for LMS with a larger table, belt drive motor (quieter than geared and the gears break), R8 spindle.  I'ts a new mill and I've only used it for a few operations so I can't say how well it will hold up, but the X2-3's have been around for quite a while now.  I also installed their power feed unit that's a real nice feature to have.  You can see it set up in the "New Products" forum,  New Mill in Transit thread.  It was relatively inexpensive and seems to be a quality piece for a small shop.

You can walk with a wooden leg but you can't see with a glass eye. Always use Eye Protection!
December 16, 2010
10:10 AM
Alexander m
Montreal
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Zoomie said:

After talking to the guys at  grizzly tech they indicated that the mills go: G8689 (X2), G0704 (X2 expanded), G0463 (X3), G0619 (Super X3). and now the X4 (no grizzly parallel, yet). The G0704 was a request by resellers to slot a mill between the X2 and X3. It was not a clean sheet design and "shares some design elements of the X2". there opinion? It's a grown up X2. Have I had my hands on this mill? Nope. I do anticipate seeing the G0463 and G0619 price  increasing in the very near future or possibly going away in the griz lineup.

 

Zoomie said:

After talking to the guys at  grizzly tech they indicated that the mills go: G8689 (X2), G0704 (X2 expanded), G0463 (X3), G0619 (Super X3). and now the X4 (no grizzly parallel, yet). The G0704 was a request by resellers to slot a mill between the X2 and X3. It was not a clean sheet design and "shares some design elements of the X2". there opinion? It's a grown up X2. Have I had my hands on this mill? Nope. I do anticipate seeing the G0463 and G0619 price  increasing in the very near future or possibly going away in the griz lineup.


 

Grizzly does offer an X4 G0484. it can be seen in the catalog p537. It doesn't appear on the website under their mill selection, it may have been discontinued.

 

    They look the same given that grizzly likes to modify everything. But they do have the exact same table size and travel.    

The best laid schemes on mill and lathe, Go often askew, -Bobby Burns, If he was a machinist.  
December 16, 2010
11:06 AM
rdfoster
SW IA
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Hey Guys I notice that the 463 and the 619 have similar statistics. What are the differences in the motors. I mean what differences does it make whether it is a universal motor or a DC motor?

Bob

December 16, 2010
11:53 AM
ironring1
Vancouver, BC
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I used to work at BusyBee Tools, the Canadian store owned (as far as I can recall) by the brother of the guy that owns Grizzly (the fact that Grizzly didn't used to ship to Canada was due to a non-compete agreement between them), and they carry a mill called "CT129", which is virtually identical to the Grizzly G0704.  I set up both of these machines for the showroom, and spent a lot of slow afternoons going over them with a fine-toothed comb.  I was trying to make up my mind whether what I wanted was the CT129 or the mini-mill/X2 (the CT133). I originally was going to buy the CT 129, but then Grizzly started carrying it's own version of the mill last December for better price, INCLUDING the stand!  Lathemaster also carries a version of this mill under the name LM250L ( http://www.lathemaster.com/Lat…..achine.htm )

 

Now, the designers of the CT129/G0704 might have taken some inspiration from the smaller X2 mini-mill, or the X2 might have been conceived as a scaled down BF20 (I don't know which came first), but trust me, they are completely different machines. I don't think that any of the parts would swap.  Again, the G0704 is a rebranded BF20-style machine, made by Weiss according to Hossmachine.com, whereas the X2 is made by Sieg. I agree that the G0704 fills the gap between the X2 and the X3, albeit closer to the X3 than the X2, but it appears to have been an independently conceived machine, rather than a "souping up" of the X3.

 

Here's a picture of a BF-20 next to an X2.

  Although they have similarities, they clearly are different machines.  Things like the Z-travel are completely different on the two machines.  The mini-mill z-feed cranks the entire head up and down the column, using rack and pinion system (which also means that your head can collapse on the table if something in the transmission comes loose), and only the "fine feed" moves the quill.  On the G0704, you can position the head independently of the Z-feed using a crank that turns a lead screw, while the Z-feed extends/retracts the quill.  An additional fine z-feed uses an additional gear reduction to make small adjustments.  Anecdotally, at Busybee, we had a lot of the X2 mini-mills come back with burned-out circuit boards, but we never heard of troubles wit the CT129's (i.e. G0704) electronics, so I suspect that the controllers are different, too.  Note that the table on the G0704 is bigger than that of the CT129.

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