Toshiba 6LJ54058000 Magnetic Roller Gear – GEAR-04H-35-8-RLR-MG

Developer Unit Drive Component

The Toshiba 6LJ54058000 is an OEM magnetic roller gear that drives the magnetic roller inside the developer unit of select e-STUDIO copiers. The gear transfers torque from the developer drive motor to the roller shaft. It carries 35 teeth on an 8 mm bore and presses onto the roller shaft.

The moulded polymer body holds the tooth profile through continuous duty in high-volume print rooms. Each tooth engages the developer drive train at a fixed ratio, so roller surface speed stays matched to the drum. The part ships as a single unit for spare-parts stocking. Fitment is press-fit, with no retaining clip or set screw.

Wear shows up as uneven density across the page, background scatter, or a rhythmic noise from the developer section. A cracked tooth produces a repeating defect at the circumference interval of the roller. Replace the gear before the damage spreads into the adjacent drive gears. Inspect the mating gears whenever the developer unit comes out for service.

Clean the shaft and the gear seat before fitting the replacement. Seat the gear squarely and press it home by hand or with a soft-faced driver. Rotate the roller by hand to confirm smooth mesh through a full revolution. Refit the developer unit and run a full-coverage test print to check density.

Key Features

• OEM magnetic roller gear
  The genuine part holds the correct bore and tooth profile in the developer section.

• 35-tooth profile
  The tooth count matches the developer drive train on every listed engine.

• 8 mm bore
  The bore fits the magnetic roller shaft without shimming or sleeving.

• Model coverage

  • e-STUDIO 2050C, 2051C, 2550C, 2551C
  • e-STUDIO 2555C, 3055C, 3555C, 4555C, 5055C
  • ES9455, ES9465, ES9475, ES9476 multifunction units

• Polymer construction
  The moulded body resists tooth wear along the loaded drive flank.

• Single-unit packaging
  The part arrives as one item for straightforward spares inventory.

Specifications

What’s in the Box

• One magnetic roller gear, part 6LJ54058000

Why Choose This Drive Gear

• The OEM part preserves developer drive timing across the listed copier engines.

• The 35-tooth profile restores roller speed after tooth flank wear.

• Polymer construction tolerates continuous duty in high-volume offices.

• Single-unit packaging keeps spares stock simple to count and reorder.

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