Onyx
Estimated Delivery: 5โ9 Business Days from Order Date
Free Standard Shipping on All Orders to all 50 U.S. states
30 Day Return Policy with 15% restocking fee applies to change-of-mind returns.ย See full policy
You can typically expect your items to arrive within 5-9 business days, depending on your location and product availability.
Effective Date: February 7, 2026
1. Overview (Quick Reference)
2. Scope and Intent
This Return and Refund Policy applies to all purchases made through the Centra Supply website located at centrasupply.com ("Website") and shipped to customers within the United States (all 50 states).
3. Contact Information
For questions about returns and refunds, please contact our Customer Service team:
4. Return Eligibility
Customers may return products within 30 days of receipt, subject to the conditions below. We accept returns for both defective and non-defective products.
4.1 Conditions for Return
5. Return Process
5.1 Initiating a Return
5.2 Preparing Your Return
5.3 Shipping the Return
6. Return Shipping Costs and Fees
7. Specific Return and Refund Conditions
7.1 Returns Due to Change of Mind (Non-Defective Products)
Items must be unused, unassembled, and in original packaging, and the return must be requested within 30 days of receipt. A refund will be issued to the original payment method, minus the 15% change-of-mind restocking fee. Return shipping is the customer's responsibility.
7.2 Defective or Damaged Goods
Contact us within 5 business days of delivery for items that arrive damaged, or within 30 days for defects discovered later. Provide photos or videos of the defect or damage. We will offer a replacement or a full refund. No restocking fee applies, and we cover return shipping costs.
7.3 Incorrect Product Received
Inform us immediately upon receipt. We will arrange for the incorrect item to be returned at our expense and ensure you receive the correct product at no additional cost.
7.4 Product Never Arrived
Contact us if your product does not arrive within the estimated delivery time of 5โ9 business days from the date of purchase. We will investigate with the carrier. If the product is confirmed lost, we will issue a full refund or send a replacement.
7.5 Order Cancellation
Before Shipment:ย You can cancel your order for a full refund if the cancellation request is received within 24 hours of order placement and before the order has shipped.ย After Shipment:ย If the order has already shipped, please follow the return process once received. The 15% restocking fee applies to change-of-mind cancellations after shipment.
8. Refunds
8.1 Refund Conditions
Refunds are issued after we receive and inspect the returned item. We will notify you via email regarding the approval or rejection of your refund. Items must meet the return eligibility criteria in Section 4.
8.2 Refund Processing
Once we receive and inspect the returned item, we will notify you of approval or rejection within 7 business days. It may take additional time to appear in your account, depending on your bank or card issuer.
8.3 Partial Refunds
Partial refunds may be granted for items not in original condition, damaged, or missing parts for reasons not due to our error, or for items returned more than 30 days after delivery.
9. Exchanges
We replace items that are defective, damaged, or incorrect. To request an exchange, contact us at support@centrasupply.com.
10. Non-Returnable Items
11. Warranty
As an authorized dealer, Centra Supply sells products that are covered by the applicable manufacturer's warranty. Warranty eligibility and terms are set by the manufacturer and vary by brand. If your product qualifies, contact us and we will help connect you with the appropriate manufacturer support channel.
12. Timelines
13. Legal Rights
This Return and Refund Policy does not affect any statutory rights you may have under applicable law.
14. Questions and Support
Centra Supply
Phone: +1 (630) 634-7281
Email: support@centrasupply.com
Address: 339 E Parkview Ave, Elmhurst, IL 60126, United States
Business Hours: Monday to Friday, 9:00 AM to 5:00 PM CST
Legal Business Name: AMG Digital Retail LLC
By making a purchase on our Website, you agree to this Return and Refund Policy.
The Onyx SXi 21" Lithium-Ion Burnisher delivers powerful, eco-friendly performance in a compact, easy-to-use design. Its patented floating shroud and advanced dust collection system capture fine polymer dust during operation, eliminating the need for dust mopping. The integrated micro-filter vacuum bag traps particles as small as 0.5 microns, improving indoor air quality while meeting strict Green Seal GS-42 and LEED standards.
Powered by lithium iron phosphate battery technology, this model runs quietly and efficiently, avoiding the noise and emissions of propane alternatives. With up to 2 hours of runtime per charge, the SXi combines convenience, high productivity, and professional results, making it a reliable choice for schools, hospitals, and commercial facilities.
Onyx 21" Lithium-Ion Powered Floor Burnisher
Single 60 AH Lithium Iron Phosphate Battery
Floating Dust Containment Shroud
Integrated Micro-Filter Vacuum Bag
Onboard Smart Battery Charger
Working Width: 21"
Motor Power: 5 HP (3.75 kW)
System Voltage: 72 V
Battery Capacity: 60 AH / 4.32 kWh (single battery)
Battery Life: 2,500 cycles
Runtime: Up to 2 hours per charge
Charge Time: 4.8 hours
Coverage Rate: Up to 34,000 sq. ft. per hour
Pad Speed: 1,050โ1,800 RPM (variable)
Sound Level: <63 dBA
Pad Pressure: 20โ120 lbs (variable)
Dimensions: 29"W ร 64"L ร 42"H
Weight: 245 lbs (with battery)
Water/Solution Tank: 10 gallons (disconnected in burnisher mode)
Product specification and additional features. ย
Full operation, maintenance, and safety guide.
Complete parts list and ordering information.
Complete electrical wiring diagram for troubleshooting.
All Onyx products purchased through Centra Supply carry Onyxโs standard manufacturer warranty. Onyx units carry a 3/3/3/3 warranty โ 3 years on parts, labor, motor, and the rotationally-molded body. Coverage varies by product line โ contact us for the exact terms on this model.
To Claim: Email support@centrasupply.com with your order number, product model, and a description of the issue. Photos or video of the defect may be requested. Most claims are acknowledged the same business day.
Centra Supply is an authorized Onyx dealer โ your warranty is fully valid and manufacturer-backed.