Estimated Delivery: 5–9 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. 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 5–9 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: 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. After Shipment: 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 JX Plus 21" Burnisher is built for professional performance, operator comfort, and long-term durability. Designed to cover up to 34,000 square feet per hour, it’s well-suited for maintaining vinyl tile, terrazzo, and polished concrete floors. Its integrated vacuum system with a patented floating shroud provides excellent dust containment, creating a safer and cleaner work environment.
Powered by a dependable 603cc LPG engine with an LEHR fuel system and electric clutch, this burnisher also incorporates advanced safety features, including an automatic emission shutdown device. With its ergonomic design, quiet operation, and heavy-duty steel frame, the JX Plus is ideal for airports, schools, grocery stores, and retail facilities.
Onyx 21" JX Plus Burnisher w/ 603cc Engine
Emission Shutdown System
21" Pad Driver
20lb Steel Fuel Tank with Overfill Protection Device
Microfiber Vacuum Bag
Powerful Engine
603cc 17hp EPA-certified LPG engine delivers efficient, reliable power.
Integrated Dust Control
Floating brush skirt and 2.5" vacuum port capture fine dust particles for a cleaner workspace.
Emission Monitoring
Onboard system provides real-time tracking with automatic shutdown for high emissions.
Quiet Operation
Noise level under 87 dBA with anti-vibration isolators and ergonomic controls for operator comfort.
Durable Frame
Heavy-duty powder-coated steel frame designed for long-lasting use.
Versatile Design
Supports 21" pad sizes with adjustable speeds ranging from 1,200–2,100 RPM.
Advanced Safety Features
Equipped with an electric clutch and internal vaporizer to prevent regulator freezing.
Extended Runtime
Provides up to 6 hours of continuous use on a single 20lb LPG cylinder.
| Product Function | Floor Burnishing |
| Operation Mode | Walk-Behind Pad Assist |
| Power | LX600 17hp Propane Engine |
| Working Width | 21" |
| Dust Control | Floating Shroud with Dust Collection Bag |
| Run Time | 6 Hours Per 20lb Propane Cylinder |
| Pad / Brush Size | 21" |
| Pad Speed | 1200-2100 RPM |
| Dimensions | 21"W x 53"L x 48"H |
| Clutch | Included |
| Emission Monitoring System | Included |
Product specification and additional features. Â
Full operation, maintenance, and safety guide.
Complete parts list and ordering information.
Complete electrical wiring diagram for troubleshooting.
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Learn how to diagnose and repair an engine that does not start.
Learn how to diagnose and repair an engine that starts, but quickly dies when the key is in the RUN position.
All Onyx products purchased through Centra Supply carry Onyx’s standard manufacturer warranty. Onyx units carry a 3/3/3/3 warranty — 3 years on parts, labor, motor, and the rotationally-molded body. Coverage varies by product line — 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 — your warranty is fully valid and manufacturer-backed.