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Stainless steel MK7 drive gear 12mm OD 13mm high 5mm bore for 1.75mm filament

Unique-Bargains

Unique-Bargains MK7 Drive Gear 5mm Bore 12mm OD 13mm H Stainless Steel

SKU CH-M85G-092Q8

Stainless-steel MK7 drive gear with 12 mm outer diameter, 13 mm height and 5 mm bore grips 1.75 mm filament

  • Secure filament grip with deep grooves for 1.75mm
  • Stainless steel construction resists wear in 3D printers
  • Precise 5mm bore fits standard extruder shafts
  • 12mm outer diameter and 13mm height match MK7 specs
  • M4 thread size enables direct extruder mounting

MK7 Drive Gear for 3D Printers

The Unique-Bargains MK7 drive gear is a stainless-steel component built for direct extruder assemblies on RepRap-style 3D printers. It accepts 1.75mm filament and uses deep grooves to maintain a secure grip during printing. The gear is supplied new as a single replacement part for maintenance or upgrades.

Replaces worn extruder gears

Swapping to this gear is worthwhile when the original drive gear shows stripped teeth, rounded grooves or slipping that causes under-extrusion. The 12mm outer diameter and 13mm height match the standard MK7 profile, while the 5mm bore fits common stepper motor shafts secured with an M4 grub screw. It restores consistent filament feed without modifying the extruder body.

Limited to MK7-compatible extruders

The gear only fits extruders designed for the MK7 mounting pattern and a 5mm motor shaft with M4 threading. Printers using different gear diameters, bore sizes or mounting methods cannot use this part. Buyers needing a dual-gear setup, a different bore or a larger diameter must source a different component.

How it compares

Measured against everything we stock in Print & Scan Accessories, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 99% of the 5,855 comparable items (median $91.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

What shaft diameter does the 5 mm bore on this MK7 drive gear fit?

The gear has a 5 mm bore designed to slide onto a 5 mm motor shaft.

How do I secure the stainless steel gear onto the motor shaft?

The gear includes an M4 thread for a set screw; tighten the set screw against the flat on the shaft to prevent slipping.

When should I replace this drive gear?

Replace the gear when the deep grooves that grip 1.75 mm filament become worn smooth and extrusion becomes inconsistent.

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