Warranty, Cancellations, and Returns

This page provides general information about our warranty, cancellations, and return policies.


Please note: LongMills come with a 90 day warranty. Details can be found on the product page.

Unless specifically noted for each product on the product page, we provide a 60-day warranty once your order is received by the purchaser against missing parts, defects in material, and defects in workmanship. This warranty does not cover products for wear and tear, improper use, intentional damage, modifications, and lack of maintenance. Consumables such as end mills, anti-backlash delrin nuts, and v-wheels that have been opened or used are not covered under warranty.

Sienci Labs will ensure additional service is provided to replace defective parts or provide a partial or full refund. Sienci Labs may require you to ship back defective parts or provide additional information to provide warranty service.

If you need warranty service, please contact us through this form.


If your order has not shipped yet, you can cancel your order with no penalty.

If your order has shipped and is shipped back due to refusal to accept the shipment, our return policy will apply.


You may return your order within 30 days of receiving it. Orders may be subject to additional fees, and refunds will be made by the sole discretion of Sienci Labs based on the condition of the order returned.

You must first contact us to approve a return. Return shipping is the responsibility of the buyer.

Our shipping address is Unit 2 – 372 King St N, Waterloo ON. N2J 2Z3.

Fees for refunds:

Orders that are returned are subject to a 20% restocking fee. Shipping fees that were paid to ship your order are non-refundable. Products that are opened, damaged during transit, or are returned outside of the 30-day window may not be eligible for a refund.


Refunds typically take a few days to process. Most payment processors (Paypal, Moneris) usually say that it can take around 5-7 business days and up to 14 business days for money to show back in your account.