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Ferm FZ-13/330 Crank Rod Bearing Replacement

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The reciprocating motion of the saw blade is created by a crank on the motor which is connected to the drive arm with a connecting rod.

With usage, the bearings that form the joints of the connecting rod wear out and need to be replaced.

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  1. Ferm FZ-13/330 Crank Rod Bearing Replacement, remove the side cover: crwdns2935265:01crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, remove the side cover: crwdns2935265:01crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, remove the side cover: crwdns2935265:01crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Make sure the machine is unplugged before continuing.

    • Take out the saw blade.

    • Turn the scroll saw on its side.

    • Remove the 2 screws that attach the cover to the back.

    • Remove the front screw that attaches the cover to the front.

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  2. Ferm FZ-13/330 Crank Rod Bearing Replacement, remove the linkage rod: crwdns2935265:02crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, remove the linkage rod: crwdns2935265:02crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, remove the linkage rod: crwdns2935265:02crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Turn loose and remove the bolts with the 4mm Allen key.

    • Take care to not misplace the ring in the top joint.

    • Remove the linkage rod from the drive arm. The spacer on the backside of the top joint will fall out at this point.

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  4. Ferm FZ-13/330 Crank Rod Bearing Replacement, replace bearings: crwdns2935265:03crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, replace bearings: crwdns2935265:03crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, replace bearings: crwdns2935265:03crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Flip the linkage rod and use a screwdriver to push out the bearings.

    • Insert new bearings and push them in fully by hand.

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  5. Ferm FZ-13/330 Crank Rod Bearing Replacement, install the linkage rod: crwdns2935265:04crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, install the linkage rod: crwdns2935265:04crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Ferm FZ-13/330 Crank Rod Bearing Replacement, install the linkage rod: crwdns2935265:04crwdnd2935265:03crwdnd2935265:03crwdne2935265:0

    • Add some grease to the top joint spacer and stick it to the top joint bearing.

    • Slide the linkage back into the drive arm and put the ring back.

    • Return the bolts and fasten them. Turn the crank by hand to ensure the mechanism is working smoothly.

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Put the saw blade and the side cover back on to reassemble the saw fully.

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