SKU: 20211361452

Bondtech Prusa I3 MK3S Extruder Upgrade Kit EXT-KIT-68

Sale price$135.90 Regular price$151.00
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Description

Bondtech Prusa I3 MK3S Extruder Upgrade Kit EXT-KIT-68Looking for a Bondtech MK3S Extruder Upgrade Kit in Australia? This is the latest generation Bondtech upgrade for the popular Prusa I3 MK3S, with an optimized design achieved with the help of the community. This kit contains the necessary parts to convert your current extruder to our own popular design based upon our BMG (Bondtech Mini Geared) extruder with 3: 1 gearing ratio for better precision and resolution together with optimized geometry for the

Looking for a Bondtech MK3S Extruder Upgrade Kit in Australia?

This is the latest generation Bondtech upgrade for the popular Prusa I3 MK3S, with an optimized design achieved with the help of the community.

This kit contains the necessary parts to convert your current extruder to our own popular design based upon our BMG (Bondtech Mini Geared) extruder with 3:1 gearing ratio for better precision and resolution together with optimized geometry for the heatsink cooling and professional SLS 3D printed housing.
It is also compatible with the MK2.5S model.

LIGHTWEIGHT BMG (BONDTECH MINI GEARED)

With this version we also lower the moving weight to reduce ghosting and vibrations or to allow increasing the printing speed. 15% of weight saving was achieved.

PRODUCT MAIN FEATURES

This extruder upgrade kit is for the Prusa i3 MK3S, or other Prusa i3 models upgraded to MK3S.
These are its main features:

  • Adapted to fit Prusa’s new filament sensor;
  • Includes one Bondtech’s BMG extruder with 3:1 gearing ratio;
  • Optimized geometry for heat-sink cooling;
  • Less moving weight to reduce vibration and ghosting;
  • Professional SLS 3D printed housing.

    ADDRESSING 3D PRINTING ISSUES

    The enhanced housing design improves cooling and decreases heat creeping issues that all metal hotends have when printing with PLA. This small enhancement will avoid many clogs.
    The increased push force will drastically reduce slipping, shredding and deformation of the filament avoiding most of the common filament 3D printing issues that start with under and over extrusion.

    UPDATING THE FIRMWARE

    To use this upgrade in the MK3S, the E-steps needs to be updated to 830, as it uses 32-bit micro-stepping. Use this file instead.

    COMMUNITY INVOLVEMENT

    This is a co-development work with awesome guys in the Prusa Community like Chris Warkocki, Grégorie Saunier (Bear Upgrades), Olof Ogland, Erik Bjorgan, Josh Jones, Kyle Wiehe, Marc Evertz, Matt Harrison, Ocie Ward, Sando Bendig, Vecko Kojchevski (Vecko Extruder), Steven Mölby, and Yuri Delia that have provided excellent feedback and suggestions of how to develop the “perfect” extruder setup for the Prusa series printer. A lot of work has been put in this project and we tried to listen to all the inputs in order to find a solution that can be the best fit to the Prusa I3 MK3S.

     

    STEPPER MOTOR

    Lightweight 25 mm pancake stepper with 18 N/m torque.
    Max Input Current : 0.8A
    Max chamber working temperature: 80℃

    Weight Reduction:
    343,2g of parts coming out and 291,5g of parts coming in. A 51g (15%) weight saving.

    CONTENTS OF THE  X-Carriage KIT includes:

    • X-Carriage Front
    • X-Carriage Rear
    • 5x M3x10 Screws
    • 5x M3 square nut
    • 1x M3 nut

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      Shipping Notes
      • Free Standard Shipping on $100+ Orders to the USA.
      • Except Preorder products are shipped in 48 hours.
      • Delivery to the USA:
      1. Standard Shipping : 3-10 business days
      • If time is of the essence, please consider selecting expedited delivery for faster service.
      Exchange/Return Notes
      • We offer a 30-day return/exchange service after receiving.
      • Final sale items are not eligible for returns or exchanges.
      • To process your return/exchange, please contact us at [email protected]
      • Please click here for more details>>> Return & Exchange Policy
      SKU: 20211361452

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      M.A.M
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      ★★★★★ 4
      Cozy Robeez
      Robeez have always been my go-to baby shoe. They are good quality and a good fit with room to grow. I never go by the month sizing since it really varies for each child. These cozy booties are nice and soft with the same fit as the standard robeez soft sole shoes. These are adjustable with two snaps options to make them tighter or looser.
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      Reviewed in the United States on May 29, 2025
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      Kyle & Noelle
      Dallas, US
      ★★★★★ 5
      Prefer over socks!
      Size: 12-18 Months Toddler, Color: Pink Sherpa
      These are a great option for babies and toddlers that won’t keep their socks on! We wear these all the time- my little girl even takes naps in them sometimes. They are soft and washable and I love that they have the grippies on the bottom now that she’s walking. She doesn’t slip in them even when walking like she does in some socks.
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      Reviewed in the United States on February 9, 2026
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      Dawn
      Charlottesville, US
      ★★★★★ 5
      Love roebeez brand
      Got two pairs of these for baby showers. Love them so cute beautiful color love roebeez brand
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      Reviewed in the United States on October 5, 2025
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      Cuba, US
      ★★★★★ 3
      Not anti slip. Baby can't pull off.
      Size: 12-18 Months Infant, Color: Light Pink Sherpa
      Made and fits well, baby can't really pull them off. The bottom of the bootie is slick not anti slip so baby was sliding everywhere, while trying to walk on hardwood floor.
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      Reviewed in the United States on May 5, 2026
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      Chandler Garland
      Bozeman, US
      ★★★★★ 5
      Would recommend
      Size: 12-18 Months Toddler, Color: Pink Sherpa
      These shoes are easy to put on and fit great. My daughter can’t easily take them off. I love the material and I’m grateful that I know her feet are warm during the cold month. They seem like they’d be easy to wash.
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      Reviewed in the United States on November 30, 2025

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