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LK4 X FDM 3D Printer


  • Powerful direct dual-gear extruder, compatible with more filaments, smoothly prints
  • 95% Pre-assembled & intelligent automatic leveling, free your hands, make 3D printing easier
  • Building size of 8.66"*8.66"*9.84" (220*220*250mm),  meets routine requirements and lower power consumption
  • Flexible PEI film for easier mold taking
  • The 32-bit open-source motherboard is equipped with four sets of ultra-silent modules, creates freely
  • Resume printing & run out protection, don't worried about accidents
  • 4.3-inch touch screen, in one step

  • About this item

    • 16-Point Auto Leveling - Longer LK4 X 3d printer equipped with 16-point precision leveling to ensure the correct distance between the platform and nozzles. A leveled print bed is a prerequisite for successful 3D printing results. Auto-leveling saves you time by eliminating the negative effects of a warped print bed, including clogged nozzles, model scratches, or poor adhesion.
    • BMG Direct Extruder - Longer L4 X adopts a BMG Direct Extruder, which can better control the filament motion, extrude reliably, retract accurately, and with less motor power. Compatible with PLA/ABS/PETG/TPU flexible filaments.
    • Silent Open Source Motherboard - Longer LK4 X the brand new 32-bit motherboard is equipped with 4 ultra-quiet drivers, and the low noise during operation is less than 50dB, allowing you to enjoy the fun of silent printing. With open-source firmware, you can try your fantastic ideas on LK4 X by changing the G code.
    • Removable PEI Magnetic Platform - 1. Easy to use: Peel off the protective layer of the bottom tape, glue the magnetic base on the heat bed, the flexible stainless platform can be easily attached and removed, without clips to hold it in place. 2. Easy Mold pickup: Prints come off the surface easily when the temperature of the heated bed reaches room temperature. If the print is still stuck, gentle flexing of the plate will help remove it.
    • Dual Blower Kit - The LONGER LK4 X 3D Printer use the newly upgraded cooling fans - dual blower kit which can promote quick cooling on the extruded filament, improves the quality of printing, have strong power on the cooling nozzle to get a better and smooth surface of model.

    Intelligent Auto Leveling
    With 16-point exact leveling, the unevenness of the hot bed is automatically compensated, deducting the hassle of manual leveling, and improves printing

    Direct Dual-gear Extruder and Compatibility
    Longer LK4 X features a direct dual-gear extruder with a 5:1 reduction ratio, stronger and more accurate filament control, and is compatible with PLA, TPU, ABS, PETG, and Wood.

    Product Specifications

    Model Number: LK4 X

    Printing Technology: FDM

    Working Area: 220*220*250mm(8.66"x8.66"x9.84")

    Printing speed: ≤180mm/s

    Printing accuracy: ±0.1mm

    Layer thickness: 0.1-0.4mm

    Support filaments: PLA/TPU/ABS/ PETG/Wood

    Direct drive extruder: Direct drive extruder

    Auto leveling: Yes

    Filament Detector: Yes

    Resume Printing:Yes

    Hotbed: PEI Flexible Steel

    Motherboard: 32-Bit Open Source & Silent Motherboard

    Connection method: TF card or USB

    Hot bed Temperature: ≤100°C

    Nozzle Temperature: ≤250°C

    Rated power: 320W

    Gross Weight: 9.78KG

    Printer Dimension: 485*465*615mm

    Package Dimension: 540*525*265mm

    Order Confirmation:

    As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase.  As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

    Order Shipment:

    If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

    Cancellations & Refunds/Returns:

    Before accepting a return on a product that isn't functioning as it should, Project 3D Printers reserves the right to exhaust any and all means to resolve and/or repair the malfunction through technical support and replacement parts provided by both the manufacturer and Project 3D Printers.  No return will be accepted without reasonable attempts to resolve the issue(s) first.  All returned products must be returned within 10 days of date of purchase.

    Project 3D Printers enforces a strict "No Returns Accepted" policy for opened and/or partially used products, including filament, resin, or any consumable of any size and weight that has been used or opened from its factory and vacuum seal.  Only products and consumables that are unused, and in brand new factory condition are eligible for return to the manufacturer of origin within 10 days of the purchase date.

    If a product is found to be non-functional or defective, the product must be returned with its full original contents within 10 days of the delivery date for inspection of the non-functionality.  If the product is found to be defective or non-functional a full-refund will be given, not including return shipping at the customer's expense.

    All orders cancelled after 48 hours are subject to a $20 administration fee, whether or not your order has shipped.  If you order has shipped, you (the buyer) will also be responsible for actual return shipping charges. Refunds will only be issued to the original credit card that you use when placing your order.  Buyer is responsible for and pays a 20% restocking of the value of the returned item(s).  Buyer pays all shipping fees for the returned item(s). 

    Customs Fees, Tariffs, Duty Fees and Import Taxes:

    Only customers are responsible for their local import taxes, tariffs, duty fees and import taxes incurred during shipping.  To know about your customs import duties please contact your local customs office with this details  (HS Code :8477 Product description: 3d printer or 3d printer kit). If the tax amount is high, we can provide assistance to reduce it.


    We work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price than us within six months of your purchase date please let us know and we will refund your original payment for the difference.  We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

    To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

    Our 100% Price Guarantee has some limitations:

    • You must purchase the item from our website before requesting your Price Match Guarantee
    • Promotions such as rebates and buy one, get one free offers are not eligible
    • The item must be in stock on the competitors website
    • The competitor must be an online store, they may not have a retail location
    • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
    • The competitor must be an Authorized Retailer of the product in question
    • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax