Johnson Bandsaw
 | |
| Owner/Loaner | PS:One |
|---|---|
| Serial Number | J14445 |
| Make/Model | Johnson Model J (JD) |
| Arrival Date | 1/13/14 |
| Usability | yes |
| Contact | Dean Anderson |
| Authorization Needed | yes |
| Hackable | no |
| Estimated Value | 700 |
| Host Area | Cold Metals |
Status
- A VFD has been fitted, this allows the machine to run on a 110v circuit and provides a variable speed control. The display shows the RPM of the drive wheel (16") * 4 which is approximately blade speed in FPM. The power switch on the left side of the control box applies power to the VFD. The on/off button on the front panel and the limit switch control the blade, the button must be out for on and the limit switch up to run. The button switch serves as an emergency switch, pull for on push for off. The dial controls RPM.
- Jim Brink 12/10/16
- The large groove (fastest speed) of the motor shaft step pulley is bent. The motor vibrates excessively when the belt is in this groove. Use the other grooves (slower speeds) until the pulley is replaced.
This tool requires authorization for use.
Johnson products are now supported by Dake. http://www.dakecorp.com/ Replacement parts for this saw are generally available.
Specifications
| Capacity | 10" rounds, 18" flats |
| Blade Size | 137" x 3/4" |
| Blade Speed | FPM = RPM of drive wheel* 4.18 |
| Power | 120V via VFD, motor is 3/4HP,240V, 3 phase |
| Weight | 683 pounds |
| Mfg. Date | 1964 |
Blades
General rule of thumb is that if the thinnest part (in the direction of the blade) that you're cutting isn't at least 3 saw teeth thick, it will damage the blade.
To-Do
Grease pivot bar
Add coolant pan and pump.
Add blade brush.
Post a chart of recommended blade speeds for various materials.
Maintenance
Major Components
The main power lever; currently, does not tend to automatically disengage when the saw fully closes
The motor control panel; note: the blade speed readout, the emergency stop button, & the speed control knob
The 110/120V plug on the end of the power cord, attached to the control panel
The descent control weight; the lever unlocks the weight for repositioning
The main tension spring; provides descent resistance, controlled in part by the adjustable weight
The valve control knob for the hydraulic cylinder; controls descent resistance, & can lock the saw open
The hydraulic cylinder, controlled by the needle valve (bottom), which is controlled by the valve control knob; provides descent resistance
The fixed (left) & movable (right) jaws of the built-in vice; note also the screw engagement lever, to the right of the movable jaw, and the clamping screw, visible through a slot to the right of the engagement lever
The vice clamping screw engagement lever; note also the clamping screw, visible to the right
The vice clamping wheel; opens & closes the vice, when the movable jaw is engaged with the clamping screw
The yellow movable (left) & fixed (right) blade guides; note also the built-in vice
The movable blade guide control lever; used to control the length of the exposed area of blade
Auth/Use Notes
These notes are for authorized users and authorizers; you must be authorized on the tool by a person, not this list. Don't expect this list to be complete or authoritative.
- Horizontal band saws cut via a vertically descending blades.
- The cutting tooth speed is set by a pulley in the rear and VFD.
- Lift up on the motor to get some slack on the belt.
- Don't cross wheels; keep the pulley belt straight.
- Go toward larger motor wheels for soft metals and plastic and smaller motor wheels for tough metals like steel (and tool steel.)
- The cutting tooth feed is set by a needle valve and a weight on top.
- Be gentle with the needle valve; a single finger with light pressure is enough to adjust it.
- Power
- as of 12/16 a Fluxmaster 50 VFD has been added, for more information on the Fluxmaster see the link in resources. The machine is now powered by 120v. Any 120 volt outlet can be used.
- Power to the VFD is controlled by the toggle switch on the left of the control box.
- The button switch on the front and and the trip lever control the motor. The button must be pulled out and the trip lever up. Both must be 'on' to power the motor.
- RPM is controlled by the dial and the belt position.
- The large display shows approximate blade speed in feet per minute. The smaller display on the VFD shows the output frequency of the VFD and is not needed for operation.
- Turn off switches and unplug the machine when you're done to prevent accidental activation.
- Never walk away from the machine while it's running. We are not a production shop; babysit the machine in case it fails and avoid putting curious people in danger.
- Clamping a workpiece
- Short pieces cock the vice jaws. This ruins the grip on the workpiece and is to be avoided. Componensate by using a block approximately the size of your workpiece or a machinist jack on the far side of the vise jaws.
- Check the width of your workpiece against the teeth.
- The thinnest section of the workpiece should be wider than three teeth in a row.
- The thickest section of the workpiece should be narrow than twenty-four teeth.
- If you're cutting angle stock, rotate it so that it forms a < shape to prevent it from rotating.
- If you're cutting round, use angle blocks (in the tooling cabinet) to keep it from rotating.
- Check that the movable blade guide is as close as possible while clearing the vice and the table.
- Safety
- Unplug the machine before adjusting the pulley or changing the blade.
- Never leave the machine while running. We aren't a production shop; you need to be right by the machine in case something goes wrong or if a curious person walks by.
- Clean up when you're done. Don't leave stock in the machine; don't leave chips and coolant behind. Use a small bucket to catch chips before they hit the ground.
References
Manual for the latest version of the Model J (very similar).
http://www.dakecorp.com/manuals/Model%20Johnson%20J%20Saws.pdf
Good link for restoration, including coolant pan dimensions and bearing sizes. http://www.shopfloortalk.com/forums/showthread.php?t=21021
Manual for Fluxmaster 50.
https://www.tecowestinghouse.com/Manuals/FM50%20Instruction%20&%20User%20Manual_0405.pdf
Rebuilding video series https://www.youtube.com/watch?v=TEq7_pH7Uws
List of Currently Authorized Users
| Qualified Member | Trained By | Date |
|---|---|---|
| Dean Anderson | ||
| Todd Allen | Ed Bennet | |
| David Morton | Anna Yu | |
| George Shaw | Thomas Wright | |
| bandit Gangwere | Ed Bennet | |
| Michael Skilton | Tucker | |
| Eric Stein | Tucker | |
| Kyle Bieneman | Todd Allen | |
| Scott Little | Todd Allen | |
| RJ Metzger | Todd Allen | |
| Giovanni Arroyo | Todd Allen | |
| Mark C. | Todd Allen | |
| Joao Santos | Todd Allen | |
| Nicholas Haldereman | Todd Allen | |
| Doorman Dave | Todd Allen | |
| Stephen Ioannou | Todd Allen | |
| Lucas Goossen | Todd Allen | |
| Roger Moore | Todd Allen | |
| Matt Wilkens | Todd Allen | |
| Rhonda Jackson | Todd Allen | |
| Matt Meshulam | Todd Allen | |
| Kevin Pulver | Todd Allen | |
| Andrew Camardella | Todd Allen | |
| Mike Coriale | Todd Allen | |
| John Farmer | Todd Allen | |
| Jay Pee | Todd Allen | |
| Sam Paris | Todd Allen | |
| Jake Rush | Todd Allen | |
| Carolyn Ignacio | Todd Allen | |
| Andrew Sowa | Todd Allen | |
| Hilary Lee | Todd Allen | |
| Eric Slehofer | Todd Allen | |
| Sam Reicks | Todd Allen | |
| Tyler Matthew | Todd Allen | |
| Ben Bogler | Todd Allen | |
| Brittany Krawczyk | Todd Allen | |
| Cary Lahucik | Todd Allen | |
| Eric Yu | Todd Allen | |
| Davis Mazariegos | Todd Allen | |
| Dan Baltudis | Todd Allen | |
| Ryan Taylor | Everett Wilson | |
| Andy Richardson | Everett Wilson | |
| David Srebro | Todd Allen | |
| Shae Kurko | Todd Allen | |
| Simon Cygielski | Todd Allen | |
| Jeff Lawson | Ron Olson | |
| James Villalpando | Ron Olson | 5/19/15 |
| Greg "Nerobro" Teiber | Everett Wilson | |
| Pericles Tsellos | Todd Allen | 14JUN2015 |
| Hunter Koerner | Todd Allen | 6/14/15 |
| Eric Reusche | Todd Allen | |
| Raj Perera | Todd Allen | 6/14/15 |
| Erik Wessing | Todd Allen | |
| Ryan Neuman | Ron Olson | |
| Kevin Sampson | Todd Allen | 7/22/15 |
| Jim Baker | Todd Allen | |
| Tom Boeman | Todd Allen | 8/30/15 |
| Jonathan Levine | Todd Allen | 9/23/15 |
| Alejandro Drexler | Todd Allen | 9/23/15 |
| Sheila Miguez | Everett Wilson | 10/14/2015 |
| Niko Hawley | Todd Allen | |
| Will Alt | Todd Allen | 10/28/15 |
| Peter Letscher | Todd Allen | 10/28/15 |
| Aaron Carlock | Todd Allen | 11/18/15 |
| Jennie P | Todd Allen | 11/18/15 |
| Kurt Ziegel | Todd Allen | 11/18/15 |
| Mike Forkan | Ron Olson | 11/18/15 |
| Marcin Ignasiak | Ron Olson | |
| Greg Kudlacz | Todd Allen | |
| Daniel Maziarz | Todd Allen | |
| Jean Michel Crettaz | Todd Allen | 12/14/15 |
| Dafe Hughes | Todd Allen | 12/16/15 |
| Lauren Svedman | Michael Patton | 1/06/16 |
| Bruce McConachie | Michael Patton | 1/10/16 |
| Andrew Dalesandro | Michael Patton | 1/10/16 |
| Tony Johnson | Michael Patton | 1/10/16 |
| Brandon Love | Michael Patton | 1/27/16 |
| Connor Sullivan | Tom Judge | 1/22/16 |
| Adam Stafford | Michael Patton | 4/17/16 |
| Ian Monroe | Michael Patton | 6/29/16 |
| Joe Iklov | Michael Patton | 6/29/16 |
| Jim Brink | Michael Patton | 6/29/16 |
| Frank Bowles | Michael Patton | 6/29/16 |
| Eugene Liokumovich | Michael Patton | |
| Sam Olendorf | Michael Patton | |
| Matthew Quigley | Michael Patton | |
| Brian Cuocci | Michael Patton | 10/5/16 |
| Jon Komperda | Dean Anderson | 11/6/16 |
| Abel Greenwald | Michael Patton | |
| Jon Komperda | Dean Anderson | 11/6/16 |
| Jason Pittman | Chris Ruhland | 03/07/17 |
| Bruce Mace | Chris Ruhland | 3/7/17 |
| Bhairavi Warke | Chris Ruhland | 3/23/17 |
| Brian Adamson | Chris Ruhland | 3/23/17 |
| Bob Loos | Chris Ruhland | 3/23/17 |
| Jeremy Shaw | Chris Ruhland | 4/09/17 |
| Sam Chen | Chris Ruhland | |
| Molly Adamski | Chris Ruhland | 4/09/17 |
| Carlos Garcia | Chris Ruhland | 5/17/17 |
| Ben Stringer | Chris Ruhland | 5/17/17 |
| Luis Colmenares | Sam | 6/12/17 |
| Andrew Wingate | Todd Allen | 7/17/17 |
| Joanna C. | Sam O. | 9/27/17 |
| Sean Nixon | Sam Ohlendorf | 9/27/17 |
| Mateusz Pec | Sam Ohlendorf | 9/27/17 |
| Bobby Huggins | Sam Olendorf | 11/15/17 |
| Ryan Himmelblau | Sam Ohlendorf | 11/15/17 |
| Mac MacDevitt | Sam Ohlendorf | 12/20/17 |
| Nathan Witt | Sam Ohlendorf | 11/29/17 |
| Aaron Vander Bee | Sam Olendorf | 1/10/18 |
| Amanda Assaley | Sam Olendorf | 1/10/18 |
| Stephanie Pelzer | Sam Olendorf | 1/10/18 |
| Chris Eppig | Sam Olendorf | 1/10/18 |
| Alex Berkowitz | Sam Olendorf | |
| Scott Fullman | Sam Olendorf | 2/7/2018 |
| Wrobel | Sam Olendorf | 02/07/2018 |
| Michael Ice | Sam Olendorf | 2/08/18 |
| Francisco Becerril | Sam Olendorf | 2/07/18 |
| Bill Schroeder | Sam Olendorf | 4/18/2018 |
| Maciej Warchalowski | Sam Olendorf | 6/13/2018 |
| Kevin Wendt | Abel Greenwald | 7/6/2018 |
| Jeff Benning | Sam Olendorf | 7/11/2018 |
| Aaron Hale | Sam Olendorf | 8/8/2018 |
| Ryan Treacy | Sam Olendorf | 9/19/2018 |
| Earl Wood | Sam Olendorf | |
| Jacob Dawson | Sam Olendorf | 9/19/2018 |
| Craig Cernek | Dave Solomon | 03/27/19 |
| Matt Saunders | McTavish McArdle | 7/23/2019 |
| Patrick Cook | McTavish McArdle | 7/23/2019 |
| Mike Thompson | McTavish McArdle | 08/27/19 |
| Malindima Sampa | McTavish McArdle | 1/7/2020 |
| Michelle deLeon | McTavish McArdle | 02/04/20 |
| Corwin Kline | McTavish McArdle | 02/04/2020 |
| Grant Boyle | Ben M | 3/11/2020 |
| Dylan Ambrosini | Dave | 8/4/2020 |