|Item Weight||18.2 pounds|
|Package Dimensions||16.9 x 10.8 x 9.2 inches|
|California residents||Click here for Proposition 65 warning|
|Item model number||37110|
|Item Package Quantity||1|
|Warranty Description||Limited Warranty of Proxxon Power Tools for home use. Prox-Tech, Inc. warrants to the original purchaser only that all Proxxon consumer power tools will be free from defects in material or workmanship for a period of two years from the date of purchase. Seller's sole obligation and your exclusive remedy under this limited warranty and, to the extent permitted by law, any warranty or condition implied by law, shall be the repair or replacement of parts, without charge, which are defective in material or workmanship and which have not been misused, carelessly handled, or misrepaired by persons other than Seller or Authorized Service Station. This limited warranty does not apply to accessory items such as circular saw blades, drill bits, router bits jigsaw blades, sanding belts, grinding wheels and other related items. Damage to the product resulting from tampering, accident, abuse, negligence, unauthorized repairs or alterations, unapproved attachments or other causes unrelated to problems with material or workmanship are not covered by this warranty. Any implied warranties shall be limited in duration to two years from date of purchase. Some states in the U.S. and some Canadian provinces do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. In no event shall seller be liable for any incidental or consequential damages (including but not limited to liability for loss of profits) arising from the sale or use of this product. Some states in the U.S. and some Canadian provinces do not allow the exclusion or limitation of incidental or consequential damages, sol the above limitation or exclusion may not apply to you.|
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Proxxon 37110 Micro Mill MF 70
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- Variable speed 5000-20000-Rpm with 1/8HP (100-Watts) motor; 110 to 120-Volt AC, 60 HZ
- Table size 7-7/8-Inch by 2-3/4-Inch (200 by 700mm)
- With X-Y travel, 5-17/64-Inch and 1-13/16-Inch vertical travel 2-3/4-Inch
- 57/64 by 8-55/64-Inch (130 by 225 millimeter) weighs 15.5-Pound
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Small and beautiful - the accurate mill for lab, optician, jewelry, electronic- and model-building projects. The unit is supplied with a stable base of cast iron. Both vertical column and compound table are of treated, high quality aluminum. All axes are play-free and have adjustable slides. The headstock, made of die-cast aluminum, houses the 24 pole balanced special motor and provides stability even at high operating speeds. This stability facilitates the use of the finest cutters. Six triple slit, hardened MICROMOT steel collets come with the machine and cover shank sizes of 1/32", 1/16", 5/64", 3/32", 7/64" and 1/8". The table is fitted with three T-slots of the 15/32" x 15/64" x 15/64" MICROMOT-norm. An adjustable ruler scale eases the positioning of the work piece. All hand wheels are zero adjustable with 1 revolution = 3/64", 1 division = .002". Technical data: Speed 5,000 - 20,000 rpm Table Size 7 7/8" x 2 3/4" X-Y travel 5 17/64" and 1 13/16" respectively Vertical Travel 2 3/4" Footprint Size 5 7/64" x 8 55/64" Height 13 25/64" Max Power 100W Volts 110-120V AC, 60 Hz Weight 15.5 lb. 1-Hand wheels with zero adjustable scales: 1 revolution = 3/64", 1 division = 002" 2-Continuously variable speed from 5,000 - 20,000 rpm, perfect for even the smallest milling cutter. 3-Cutters are clamped in MICROMOT system collets. 4-Compound table of stable aluminum. Both axes are fitted with adjustable dovetail slides. 5-Six MICROMOT steel collets, triple slit and hardened, cover shank sizes from 1/32" to 1/8" 6-Stable cast iron base.
Proxxon micro mill MF 70 - This small and beautiful unit is ideal - the accurate mill for lab, optician, jewelry, electronic and model building projects. Mill is made with a cast iron base. The vertical column and compound lathe are treated, high quality aluminum. All axes are play-free and have adjustable slides. The headstock, made of die cast aluminum, houses 24 pole balanced special motor and provides stability even at high operating speeds. This stability facilitates the use of the finest cutters. Comes with 6 triple slit hardened steel collets 1/32-Inch, 1/16-Inch, 5/64-Inch, 3/32-Inch, 7/64-Inch and 1/8-Inch (1.0, 1.5, 2.0, 2.35, 3.0 and 3.2mm) table has three T-slots and an adjustable ruler scale which eases the positioning of work-piece. All hand wheels are zero adjustable with one revolution equals 3/64-Inch (1.0mm) 1 division equals .002-Inch (0.05mm).See all Product description
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The Proxxon MF-70 combines the utility of a Dremel with the precision of a mill. With it you'll be able to perform many operations that would be difficult or impossible holding the Dremel in your hand. Before I decided on the MF-70, I considered cobbling together a mill from a Dremel 220-01 stand and a HF X-Y vise but the Dremel stand is crap and HF X-Y vises seemed expensive and crude. I also considered getting a Vanda-Lay ACRA rig, but when you add in the cost of the adjustable X and Z axes it approaches the cost of the MF-70, and you have to add your own Dremel. In my case the MF-70 was not the cheapest option but so far it's been fun to have in the shop, and it has a lot of support if you want to go CNC. BTW I recommend picking up the 24260 precision vise, it complements the mill nicely.
On the downside, the most disappointing aspect of the MF70 is that when cranking the X axis, the table deflects +/- 0.010". That's 20 thousandths total error. Using a twisting grip on the wheel rather than cranking the handle helps reduce this to a few thousandths. Tightening the gibs helps, however the motion then becomes "grabby." The Z axis scale ring hangs up sometimes which throws it off zero and causes errors. I also wish the head rotated since it would be useful to position the spindle horizontally at times.
Another review mentions the Z axis has a lot of play or backlash. Most likely the problem is that the Z axis stop nut was set too loosely at the factory. Here's the fix: You'll need a 2.5mm allen wrench and a deep 10mm socket. Remove the four allen bolts on the top cover of the Z pillar, unscrew the Z leadscrew from the spindle nut, and remove the top assembly from the mill. Slip the 10mm socket over the leadscrew and tighten the nylock stop nut under the cover (it's left hand threaded so tighten to the left). Lightly snug the nut then back it off a bit so there's minimal axial play and the handwheel turns freely. Reassemble and test. The Z axis will be much tighter.
UPDATE: After less than a month, and used only on weekends, the motor died. It was running fine when it went "POP", the GFCI it was plugged into tripped, and that was that. It's currently at the Proxxon repair center in NC. This is very disappointing considering I've had a Dremel for years and it's taken a beating and still runs strong. Apparently the handheld Proxxon unit also suffers from these types of failures. This review has dropped a star and will be updated after my repair experience.
UPDATE 2: Prox-tech repaired the unit and it's running again. The motor and controller board were replaced. This motor is noisier than the original, similar to what other reviewers have noted, but it is tight with no excessive play as far as I can tell. Turnaround time for the repair was ~2 weeks not including shipping. Since I'm wary the motor is going to die again I've been running it at lower speeds, well off max, and it seems to be running cooler. I hope it continues to run for years because it's still a great little device and fun to use.
I don't compare it to my other machines, really. It just isn't the same league. I have used it to make simple parts and to prepare samples for analytical measurements, and for these things it is a great deal. I'm not going to build a robot chassis on it. But I make fasteners, spacers, small connecting rods, etc. It works. I have used it enough that the backlash adjustment has become second nature, and I cannot recall how much I measured. The other review seems to be of a mill with problems. Mine arrived fine, and I monkeyed with it very little before cutting, so I am a big fan.
A couple notes for potential users-
Tiny (<3mm) end mills turning at 20,000RPM are very different than tens of mm end mills turning at hundreds of RPM. You'll absolutely want good ear protection as the noise this thing makes when working brass/aluminum/plastic is unreal. The chips that tiny, fast end mills throw off are awful, not at all like the big razor bits that come off a big mill- more like fiberglass-type shards that get under your skin and itch like crazy. Big shop gloves are too unwieldy for small work so I wear non-powdered blue nitrile gloves and those do a great job keeping my hands happy. The upside to small bits is that oil isn't usually needed when working aluminum & brass. I've never had problems with end mills overheating/binding on this yet.
Speaking of bits, it takes Dremel-type collets and therefore takes all Dremel rotary bits. But I don't recommend using those unless you're working with wood and absolutely need some oddball shape as they *will* overheat and bind and just don't cut that well. Stick with good end mills- the set that Proxxon markets is decent and McMaster-Carr has a great selection. Be aware though that the largest end mills that are useable on this machine are 1/8" or 3mm, limited by the size of the largest collets included. It may take actual Dremel collets but I haven't tried.
As a couple other reviewers have noted, there may be some backlash on the column (Z-axis); this is fixable with instructions provided in a previous review. It would be nice if Proxxon checked that at the factory but I would assume that those who are buying a mill are the type who are comfortable maintaining their machines- even a Bridgeport needs adjusting sometimes.
My unit has no issues with backlash on the X-Y axis but does sometimes need the table jibs tightened to prevent wobble if something is clamped in an unusual way. They make these user-adjustable for a reason.
The small size (about 1ft tall) and weight (about 15lbs) means that it absolutely must be bolted to a table for stability (the mill has holes for 1/4" bolts in the bottom). I got my hands on a cheap Ikea table and ran bolts right through the tabletop and fastened the legs to a wall with L-brackets. Don't let the small size of the MF70 fool you into thinking you'll be able to move it around and store it away in a cabinet when it's not being used; it does need proper support.
All in all, I highly recommend the MF70 - IF it's the right tool for your task! If you're just looking for a cheap mill and the price on this caught your eye, keep looking. If, however, you want to fabricate or modify things that fit in the palm of your hand- can't go wrong with this.