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  1. #1
    Join Date
    Mar 2008
    Posts
    148

    Default Wood to Metal Bandsaw conversion

    I purchased a simple three speed, 14" wood cutting bandsaw from Harbor Freight for under $300. A few years back I bought a half dozen DC Tread Mill motors off the internet for $29 each. I really wanted a metal cutting bandsaw for aluminum and mild steel. This conversion with high quality metal cutting blades will easily cut steel plate to 3/16 dry and larger if I use my "mist" cooler. It ripps through 1/2 Aluminum with a skip tooth blade like a hot knife through butter!

    Full write-up here............

    http://public.fotki.com/Rbertalotto/...w-wood-to-met/






    RoyB
    Dartmouth, MA

    http://www.rvbprecision.com

    Millermatic 185 MIG
    Miller Diversion 165
    Purox W200 O/A
    Grizzly 9957 Mill
    Grizzly 4030 Metal Band Saw
    Grizzly 1050 Knife Belt Sander
    Jet 1236 Metal Lathe
    TP Blast Cabinet

  2. #2
    Join Date
    Aug 2007
    Location
    Northern California
    Posts
    187

    Default

    Quote Originally Posted by rbertalotto View Post
    I purchased a simple three speed, 14" wood cutting bandsaw from Harbor Freight for under $300. A few years back I bought a half dozen DC Tread Mill motors off the internet for $29 each. I really wanted a metal cutting bandsaw for aluminum and mild steel. This conversion with high quality metal cutting blades will easily cut steel plate to 3/16 dry and larger if I use my "mist" cooler. It ripps through 1/2 Aluminum with a skip tooth blade like a hot knife through butter!
    That's very nice. I have a 1972 14" Rockwell Delta Bandsaw that I use for wood. I have a 1750 rpm 1/2 hp Baldor motor in it so it's too fast for metal in general. That saw has been running constantly since I bought it with only a new set of rubber treads and one motor bearing. I have the 6" riser kit so I can run 105-1/2" blades. I use the same size blades on my 7X 12" Enco horizontal bandsaw with a different tooth cut, of course,

    I was wonder what the hp rating is on the treadmill motors? I would like to do the same modification on my saw for cutting aluminum stock.

  3. #3
    Join Date
    Mar 2008
    Posts
    148

    Default

    These motors are 1/2HP. But DC horse power with a speed control governor is much different than an AC motor. I can stop a 1/2HP 1750 RPM motor with a gloved hand on a 3" diameter pulley. I can NOT stop one of these motors with the same pulley.......

    Ive replaced 2HP motors on milling machines with these 1/2HP motors and noticed no difference in power.
    RoyB
    Dartmouth, MA

    http://www.rvbprecision.com

    Millermatic 185 MIG
    Miller Diversion 165
    Purox W200 O/A
    Grizzly 9957 Mill
    Grizzly 4030 Metal Band Saw
    Grizzly 1050 Knife Belt Sander
    Jet 1236 Metal Lathe
    TP Blast Cabinet

  4. #4
    Join Date
    Aug 2007
    Location
    Northern California
    Posts
    187

    Thumbs up

    Thanks! I'll be on the lookout on eBay unless you beat me to it. LOL.

  5. #5
    Join Date
    Mar 2008
    Location
    Torrance, Ca
    Posts
    83

    Default

    Talk about timing. Was on the market for a metal bandsaw.
    Dynasty 200 DX
    Lincoln 140
    O/A
    Gradatim vincimus
    "We conquer by degrees."

  6. #6
    Join Date
    Oct 2007
    Location
    Indiana
    Posts
    541

    Default

    You could always build one.
    Tim Beeker,
    T-N-J Industries
    (my side bussiness)

    Miller Synchrowave 350LX with tigrunner
    Esab 450i with wire feeder
    HH135 mig
    Thermal Dynamics cutmaster 51 plasma cutter
    Miller aircrafter 330 - sold
    Marathon 315mm coldsaw
    vertical and horizontal band saws
    table saw
    Dewalt cut off saw
    Sand blast cabinet
    lots of hand grinders
    Harris torch
    beer fridge

  7. #7
    Join Date
    Mar 2008
    Location
    Torrance, Ca
    Posts
    83

    Default

    Quote Originally Posted by tnjind View Post
    You could always build one.
    Thats what Im a gonna do.
    Ok. Stupid electrical Question. I assume you need a transformer to make the swap work. What to look for when buying the transformer? Can rewire my motorcycles & cars but take away the wheels & im lost.
    Dynasty 200 DX
    Lincoln 140
    O/A
    Gradatim vincimus
    "We conquer by degrees."

  8. #8
    Join Date
    Jan 2008
    Location
    VA
    Posts
    298

    Default

    Nice setup you made and good idea. Does the bottom wheel have a chip sweep to clear the metal shavings from the tire? I cut Al with my 16" made for wood band saw and the shavings are a problem with the rubber tire on the bottom wheel on mine. I tried to make a chip catcher but could not catch them all. I ended up adding a small stiff finger nail brush on a little bracket to scrub the crud off the wheel as it spins.


    Are you sure thats a DC motor? I used to work in the fitness equpment repair trade and that looks just like a 120V AC motor. DC motors are most often built with fixed magnets and that one looks like it has a winding. A 2 HP DC motor will have 2 or 4 good sized magnets and they tend to be long and thin to increase the magnet to rotor surface area. AC motors tend to be short and fat to increase the space for poles in the winding and stator. I could be complely wrong. AC or DC The controller on an AC treadmill motor will still produce rated HP accross the RPM range.
    Weekend wannab racer with some welders.

  9. #9
    Join Date
    Mar 2008
    Posts
    148

    Default

    It's not a transformer that you need, it is a solid state AC to DC motor speed control unit. I just got the latest Surplus Center catalog and they have a few different DC motors and motor controls for sale.

    Like these items:

    http://www.surpluscenter.com/item.as...-2102&catname=

    http://www.surpluscenter.com/item.as...-2352&catname=
    RoyB
    Dartmouth, MA

    http://www.rvbprecision.com

    Millermatic 185 MIG
    Miller Diversion 165
    Purox W200 O/A
    Grizzly 9957 Mill
    Grizzly 4030 Metal Band Saw
    Grizzly 1050 Knife Belt Sander
    Jet 1236 Metal Lathe
    TP Blast Cabinet

  10. #10
    Join Date
    Mar 2008
    Posts
    148

    Default DC Motor on Ebay

    http://cgi.ebay.com/NEW-LEESON-90-VO...QQcmdZViewItem


    Here's a motor somebody should jump on..........
    RoyB
    Dartmouth, MA

    http://www.rvbprecision.com

    Millermatic 185 MIG
    Miller Diversion 165
    Purox W200 O/A
    Grizzly 9957 Mill
    Grizzly 4030 Metal Band Saw
    Grizzly 1050 Knife Belt Sander
    Jet 1236 Metal Lathe
    TP Blast Cabinet

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