Horizontal Bandsaw

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Clarke CBS45MD Horizontal Bandsaw
CBS45MD.jpg
Looks almost entirely unlike this.
About
Donated by Bob, Richard, Ben
Used for Cutting Metal Rod, Bar and Tube to length
Training required Yes


The bandsaw is a Clarke CBS45M, a convertable horizontal / vertical bandsaw, designed for cutting metal bar, rod and tube down to length. It has a 1/2hp 370w motor, and is commonly fitted with a 14TPI blade.

CBS45M Manual

Refurbishment Current Status

The machine was bought in a non-working state, the previous owner could not get the motor to spin up. Team:Metal are assessing if we need to replace the motor or rebuild the electronics before it is put in-use.

Motor

The motor that comes with the bandsaw is a 1/2HP, 370W, 1400RPM motor. It appears to use 'standard' mounting hole arrangement on the base, so should be replacable with a drill press motor if it turns out the motor is broken.

The original motor was a 500W one which seemed to be the original size. According to clarke tools this has now been replaced as a standard part with the 350W one. We now have one on order to attach to the saw

Mechanical

Mechanically, the bandsaw appears to be in good condition - bearings have all been replaced and wheels realigned before we bought it.

  • The knob for the tension adjuster has been damaged, and will be replaced with a 3d printed replacement.
  • The shelf that sits under the bed is missing, another will be bought, or fabricated.
  • The bed attachment for vertical usage is missing. Another can be bought or fabricated.

TODO

We currently have a motor on order, this needs to be fitted when it arrives.

To fix the lid that holds the pulley from the motor we need the following, for now we can just use some tape as a temporary measure (need to check with Greg on the sizes)

  • Over center catch
  • Rivets for the pot riveter

To fix the base, we just need a shelf mounting underneath there are already holes to attach the shelf and this should allow

  • Greater stability when moving the device (less likley for the legs to spread out when lifting the machine)
  • If we can coat the shelf if made out of wood with water proof paint we can also use it as a drip tray

If I mill this out of MDF then I can mill in a area in the center to act as a drip tray. Also this will require painting the mdf

Electronics

There are two microswitches, one inside the blade guard, and one inside the belt guard. These are wired in series with the motor, and must both be actuated for it to spin up. There is also a zero-volt switch for powering up the bandsaw, which is turned 'off' by the motion of the bandsaw itself hitting the off button. These parts all need checking for continuity, and replacing if they turn out to be damaged.

Ideally we will also add an e-stop mushroom button, as the existing off button on the zero-volt switch is right below the blade when cutting, which may prove difficult to hit in an emergency situation.

Everything looks fine with the electronics however after testing we believe there is a problem with the motor. After switching on the zero power switch, there was a small poof sound near the motor, and the main power breaker in the space cut out. The motor has now been detached from the saw, the bits should all be located in a plastic box (except for the blade)

Next step is to see if the motor is salvagable, and to bend the metal shrouds back into place. The device should NOT be powered up for the time being untill we can figure out the problem with the motor.

The below is the junction box below the zero power switch

Metal BandSaw.svg