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KAY3D CoreXY Conversion Kit Mk2 Based on Ender 5/Pro


Our Six Principles ×

  • Have questions regarding the product? We don't like to make uninformed choices too! Write to us. We'll answer all your doubts :)

  • Most companies make you pay more for the 'premium' stuff. We believe the best possible should be standard.

  • We don't lock up our firmwares. In fact, we even provide you the precompiled firmwares and the source files. Everything you need!

  • Becase sometimes, we know you just need more time. So we extended our return period to 60 days*, from the time you order.

  • If you do not receive your item and the courier company declares it lost, we will re-ship your order, no questions asked.

  • Complaint? Compliment? Go Straight to the Top! Our Customer Managing Director, Shania Ng wants to hear your complaint first hand.
Returns & Exchange ×
Kay3d.com is committed to providing our customers with the best levels of service. 

Please refer to the “Return Types” table below to determine the type of return options that are available for the item you wish to return. After understanding your options, you may request a Return Merchandise Authorization (RMA) if your request is submitted within the allowed time window (specified in the table below). The first day starts counting when you receive your order. RMA requests can be submitted in primarily two ways.

1. Contacting our Customer Service Team

In order to ensure a smooth and speedy service, please have the following information ready when contacting our Customer Service Team:
  1. Your order number. It starts with 'KV' and ends with 'KR' and can be found in your email after you place an order with us. 
  2. Product name of the item you wish to return if your order contains more than one item.
  3. Reason for requesting a RMA (Defective Item Exchange, Size Exchange, Unwanted or Unopened Item Return, Defective Item Repair)


2. Using the RMA request interface in your "My Account" section. You can find "My Account" on the top right hand corner of the page that you're on if you're on desktop and under the top left hand corner drop-down menu if you're on mobile.

If you feel better about speaking to somebody, please feel free to contact our customer service team here instead.

Click the specific order number your "My Account" that contains the items you wish to return. Below your list of purchases, you will find a link titled "Start a return request?" Click the link and follow the instructions.

Return Types 

Last Updated on 11th Jan, 2020
  Defective Item Exchange* Product Model Exchange* Unwanted Item Return
3D Printer Kits Available within 60
days
Not available Available within 60 days (Unopened Items only)



Please refer to the Terms and Conditions for further details. 

All returns must be sent to us within 60 days of the RMA issue date. Kay3d.com reservers the rights to refuse returns that are not received within reasonable time frame. 

Terms & Conditions 

General for all products

  1. All returns must be sent back to our respective logistics partner addresses kay3d.com's official premises with prior authorization, i.e. a Return Merchandise Authorization (RMA) number. Unauthorized returns will be refused and disregarded.
  2. Returned items must be in their original packaging. Incomplete returns may be refused or disregarded.
  3. Kay3d.com will usually reship an item if the order was returned due to a defect or a mistake on our end. Kay3d.com reserves the right to determine the res-hipping method regardless of the shipping method that was used in the original order.
  4. Items marked as “Final Clearance” are not eligible for Size Exchange, and Unwanted or Unopened Item Return.
  5. We do not offer refunds or returns in cases involving allergic reactions or adverse skin conditions due to products that we sell or carry.
  6. Kay3d.com is not responsible for items lost during return shipping. We recommend that you send your return via Registered Air Mail to ensure that it reaches us.
  7. Coupon discounts as well as shipping and handling fees from the original shipment to the customer are not refundable.
  8. Kay3d.com reserves the right to change our return policies and/or reject any exchange requests for any reason without prior notice. Should there be any dispute, Kay3d.com's decision will be final.

Defective Item Exchange

Kay3d.com will be responsible for the return shipping costs if the defective claim is confirmed to be valid. The return label that's generated will take care of the return cost. 

Unwanted or Unopened Item Return

  1. Unwanted or unopened items returned to kay3d.com must be in their original packaging. Incomplete returns and items that are suspected to have been tempered with may be refused or disregarded. Customers are required to bear return shipping fees in cases of unwanted or unopened returns. Kay3d.com will not be responsible for the items that are lost in transit while returning to our allocated locations. 
  2. Refunds for unwanted or unopened items will be issued in the same form that your payment was made; Credit Card/ PayPal. Refunds will be processed in a maximum of 14 working days once the returned products are received and confirmed to be in acceptable condition by Kay3d.com

(Manufacturing lead times remain at 7-8 weeks from order date until pandemic Covid-19 situation improves)

Have you ever wanted to do more with your Ender 5/ Ender 5 Pro? Or perhaps, your 2020 new year's resolution is to print faster and better like other high-end machines such as the ultimaker and railcore .. ? 

After much research and development, we're happy to announce that we're  releasing an equally powerful CoreXY kit to the market that fits the Ender 5/Pro series. 

Now the kit is not just any kit. It's a kit only for Ender 5/ Ender 5-Pro users who want to do more with their machines. You want to 3D print faster and better.

It's a kit for the adventurous, but not the faint-hearted. Accompanied with the kit is also handy manual over 175 pages long that has logged down every single detail, picture and instruction to help you build possibly the best CoreXY 3D Printer you can while re-using your Ender 5 Parts

Comes with the kit are laser cut metal plates to ensure that you get the best 3D printing experience possible. No more breaking of acrylic parts or bending of thin aluminium sheets or even using printed parts! In fact, this conversion kit for the Ender 5 Series doesn't use printed parts at all.

The KAY3D CoreXY Conversion Kit comes with:

Non-Cantilevered Design

kay3d non cantilevered idlers

perfectly parallel 2-level design belt with a non-cantilevered setup

KAY3D's CoreXY conversion kit also comes with a non-cantilevered design as well. All core components that have idlers and bearings are all stacked with metal spacers, washers & shims. This prevents the bolts from bending when the belts are tensioned and bent bolts equal skewed prints!

Our Mk1 kits were designed with nylon spacers in mind but we faced inaccuracies in them. This is why the current Mk2 versions have metal spacers and washers of various dimensions and within specd' tolerances. This is how we ensure your bearings, 2GT idlers and belts will, and always be aligned.

Optimizing X Axis Stability

Optimizing X axis motor weight on Ender 5 series
imagine the X axis motor removed. Equal weights on the new axis and now your motor is stationary; trueCoreXY setup. Less mass on X Axis, less ringing and more movement power

Since the X axis motor is now removed from the X-Axis, you get equal weights on the axis, left and right. With the motor shifted to the rear and working in conjunction with another motor in the CoreXY style, you also get more speed, power and accuracy in high speed movements and positioning.

Repurposing Your Existing Parts

kay3d corexy re-use components from ender 3

Build your new machine with existing parts. We know you love your Enders. We do too, so we kept them and made this

The goal of the kit was simple, to design an optimized CoreXY machine re-using as many parts as possible from the Ender 5 so changing to linear rails was definitely out of the question.

Using V-wheels as the linear motion mechanism made absolute sense for us as they're reliable and quiet. Using good linear rails would also cause a severe price hike in the kit and we really want this kit to be as affordable as possible and in all our tests, V-wheels are very good when well tuned!

Future Proofing for the Hotend

kay3d future proofing hotend plate

a newly designed hotend plate


We completely revamped the original Ender 5's hotend metal plate as we wanted something better. Something more future proof but we also wanted the original fan ducts to fit so we made this. 

This is the KAY3D's hotend plate. Comes with carefully designed holes, the plate fits Creality's MK8 extruder, the hotend fan, it can also fit E3D's newest Hemera/ Hermes with some modification. 

It also has additional M3 holes that are pre-tapped to allow for custom additions such as mounts for the BLtouch, KAVA lite, 18mm sensors etc.

Keeping it Flexible. Bowden or Direct Drive Extrusion

KAY3D BMG dual drive extruder

We understand that sometimes, bowden tubes are not everyone's cup of tea as they may lead to under extrusions so we designed an extruder that fits our hotend plate like a glove. To be printed with enough walls and infill, the KAY3D Direct Drive Extruder that utilises BMG's dual geared technology will push through filament like a complete machine.

Say no more to under extrusions and high retractions lengths with the KAY3D Direct Drive Extruder. Pinions, shafts and gears can be purchased separately. 

Downloadable Firmware and Custom Support

kay3d downloadable firmware

We know that firmware modification is not everyone's cup of tea so we're also providing you with the firmware. Choose the right firmware, click & download, flash and done.

Should your choice of motherboard be not supported, our firmware support team will even edit the firmware for you. All these as part of the support you'll be getting when using our CoreXY Conversion Kit. 

View Detailed Assembly Manual

kay3d downloadable firmware

What's worse than having a printer delivered but without proper instructions? We're big on instructions because we know you need them. So we're giving you a manual of more than 175 pages with actual pictures. Not just visual illustrations. Don't believe the details we provide? Go ahead, click on the image to view our Manual.



Here's Dwayne's latest kit, assembled right at KAY3D Labs and doing it's first test prints. He got so excited that he forgot to snip off the excess belts!

We ship internationally to more than 200 countries!

What your Purchase Pays for ×

What your Purchase pays for

We only charge you what it costs us to manufacture, pick, check, pack and ship your order, plus a small margin. We reinvest that back into improving KAY3D products.
KAY3D what your product price pays for