Terms and Conditions

Our Guarantee to You

Please note that Motion Constrained is a reseller of Hiwin products and not an authorized distributor. Product listings may be revised at any given time to reflect current availability of certain products, and limited stock may apply.

Customer Satisfaction

We strive for 100% customer satisfaction and will do everything possible to maintain this. Our 100% eBay feedback is proof of our effort to maintain very high customer satisfaction. We are not satisfied with the sale until you are.



Motion Constrained takes your privacy with the upmost importance. We will only use the information provided by you for the sole purpose of completing your order. Your information will never be shared with third parties except with your permission to complete your order.

Share and Save

The content you explicitly provide us via the contact form on our Share and Save page may be displayed on this website. Any content you provide will state who the author (you) are and that the work displayed belongs to you or your company. Some of this content may appear in postings from our social media accounts with the sole purpose of directing traffic to this website. We will not use the content provided by you for any other purpose.

Data Security

Motion Constrained takes data security very seriously. We employ a site-wide SSL certificate to keep your data safe. Your banking information is also never stored on our server and all transactions are processed through PayPal Payflow Payment Gateway.

Terms and Conditions

Product Guarantee / Return Policy

Unless specifically stated in a listing, all of our products are guaranteed in working condition upon arrival. Due to the technical nature of many of the products we sell, we cannot test every item, but do guarantee them working all the same.

We offer a 30-day no questions asked return policy on all of our items we sell. Refunds are processed promptly. Blocks will be charged a 10% restocking fee. Custom cut linear guide rails will be charged a 20% restocking fee due to the custom nature of this item. Rails must be returned with all caps. No RMA number is necessary as we get very few returns. Just let us know you wish to return an item via our contact form and send it back to the address below:

Motion Constrained LLC
Attn: Returns Department
4615 N. US Highway 287
Laporte, CO 80535

In the unlikely event an item is defective, damaged in shipping, or does not match our description, we will cover the cost of return shipment. Reimbursement will be made through a PayPal payment or we can send you a return label. In all other cases, we do ask that the buyer cover the cost of the return shipment.


We accept Visa, MasterCard, American Express and Discover directly on our site. PayPal, NET 30 Payment plans for qualifying companies/universities, as well as payment over the phone are also available.


Shipping Costs

We do not look to make money on shipping charges and ship by the most cost-effect means possible. If you feel a shipping quote is too high, please contact us and we can work with you to see if there are alternatives.


We take packaging very seriously and use only the best void fill and cushioning products available. We have a foam-in-place system, full crating department, and hundreds of in-stock box sizes. In our experience, added cost of the best shipping materials is worth it to ensure your products arrive safe and on time.

Processing/Handling Time

All orders will typically be processed and shipped within 1 business day with the exception for Fedex and orders that need a freight quote, need to be crated for freight, or custom cut linear guides. Please see below for FedEx turn around times.

FedEx Turn Around Times:


  • FedEx Ground- if ordered before 10:45am MST, will be picked up by FedEx 2 days after order date. Orders that cannot be scheduled for pickup before 11:00 am MST will be picked up 3 days later
  • FedEx Overnight, 2Day, and Express Saver- if ordered by 1:30pm MST, will be picked up by FedEx same day.


  • FedEx International Priority, FedEx International Economy, and Fedex International First- if ordered by 1:30pm, will be picked up by FedEx same day.

Same Day Shipping

If you let us know that there is rush, we usually can get products out the same day if paid for by 4:00 PM MST.

Freight/Items near/over 150lbs/ Very Large Items

Many of our products are too large to ship through small package couriers and must be shipped via truck freight. Please contact us if a freight quote seems high as we can almost always work with you to get the rate lower.

We will need a phone number and address details to schedule a freight shipment for you. Buyers are welcome to arrange their own freight pickups from our warehouse. In most cases, items will be fully crated. Depending on the size of the item there may be a palletizing/crating fee. This fee will vary depending on the size of the item. Please contact us for pricing.

Will You Reduce an Items Value on the Commercial Invoice to Reduce Customs Fees?

No, unfortunately, we cannot reduce an items value on an invoice or shipping document. We understand paying customs fees is no fun (we have to pay them often as well), but lying about customs fees is against Federal Law and the fines are severe.