SKU: 20211361452

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

Sale price$135.90 Regular price$151.00
Save 10%

Pay in installments of $37.75 with ShopPay, AfterPay and Klarna

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 31 - Aug 5

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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

    Browse more

      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

      Discover Niche Categories That Outsell

      Top-Converting Item to Boost Your Average Order

      4.7 ★★★★★
      Based on 11 reviews
      Sort
      Highest Rating
      Newest First
      Oldest First
      Product Reviews
      V
      Verified Purchase
      vic ☆
      Louisville, US
      ★★★★★ 5
      Tiny but convenient!
      Color: White, Color: White
      Long review: TLDR; it’s cute, pretty durable, tiny but spacious, and handy! First, I feel I should mention—it’s very tiny! I didn’t look at the dimensions, so that’s my fault, haha, not taking points off for it lol. It’s not big enough to fit, say an iPad Pro, but maybe a mini! It’s height is probably enough for a small book, and it’s width is definitely enough for a regular sized book. Also the length from back to front of the bag: it’s very thick! So it fits a lot for the size. It fits my about 1.5 inch thick wallet (about 5-6 inches long), my keys, a mini hairbrush, and a bag I use with toiletries like pads/tampons, mini body spray, mini hand cream, a tiny metal wallet with bandaids, hair ties, q-tips, and cotton rounds, and a couple chapsticks. The front pocket is pretty spacious too, as it fits my AirPods with a case and a bunch of keychains and dangly things on it. The straps are long and adjustable. It looks easy to clean but I haven’t spilled anything or gotten anything on it so it’s a little hard to say. I’ve included a video and pictures for reference! It came pretty smushed and squashed into a flat little pancake but it only took a little while to go to it’s intended shape. I left it full of stuff to mold it overnight (like if you stuff it gently/loosely with, say, a t-shirt or two overnight, it’ll morph into the right shape) The puff ball is cute, and it’s staying on pretty well, but the elastic thing holding it on is slowly stretching a little so it doesn’t look like it’s glued on like I liked at first, but it still looks good! It’s lasted a while now, probably a few months with no issues. Basically, I like it and it’s handy for going to the mall or store, or if you bring very small stuff to the amusement park. (It won’t fit a water bottle, but it’ll fit smaller stuff) In the video, I showed me unpacking all the stuff it can fit, and in the first picture is all that stuff. In the second picture I show the size of my 12.9 inch iPad Pro to as comparison, and in the third picture I show how it barely doesn’t fit. Hope this helps!!
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on July 9, 2022
      T
      Verified Purchase
      Tuxedorose
      Pawtucket, US
      ★★★★★ 5
      Functional and cute
      Color: Dark Apricot
      Great quality and size. Perfect for school, work or travel. Easy to wipe down and clean the outside. Decent quality of zipper. It's even held up to my teenager at high-school.
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on December 26, 2025
      D
      Verified Purchase
      Destiny
      Bozeman, US
      ★★★★★ 5
      Great Gift Daughter loves it!
      Color: White
      This Cute Handbag Bookbag is the perfect combination of style and practicality. This versatile bag is designed to look like a trendy handbag but functions as a spacious bookbag, making it an ideal choice for students, commuters, or anyone in need of a stylish yet functional bag. The design is chic and fashionable, with a compact size that’s easy to carry but still roomy enough to fit books, notebooks, a laptop, or other essentials. The adjustable straps provide comfort, while the sturdy material ensures that the bag can hold heavy items without wear and tear. It also features multiple compartments to help keep your belongings organized, and the exterior often includes stylish details that elevate its look. Whether you're heading to class, running errands, or going on a weekend trip, the Cute Handbag Bookbag is a fashionable and practical accessory that meets all your carrying needs.
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on April 2, 2025
      C
      Verified Purchase
      Candace Medrano-Flores
      Birmingham, US
      ★★★★★ 4
      Poor packaging
      Color: Gold Pink
      Cute backpack, but very poor packaging causes permanent creases in the outer leather material. If this backpack was for myself I would have returned it, but it’s something a 10 yr old will overlook.
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on November 25, 2025
      T
      Verified Purchase
      thiacomo
      Chelsea, US
      ★★★★★ 5
      Perfect!
      Color: Turquoise
      Granddaughter loved it! Perfect size, high quality, gorgeous color!
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on April 11, 2026

      recommand products