Vortex Backstops & Backstop Covers

Vortex backstop kits and backstop covers for X-Series worm gear reducers and VXT shaft mount reducers. Backstops prevent reverse rotation on inclined conveyors, bucket elevators, and other applications where the driven load must not run backwards under load loss. Texas Belting and Supply stocks the complete Vortex backstop accessory line: 14 VXT-Series backstop kits (sizes 2 through 10), 3 backstop covers (sizes 4, 5, 6), and 59 X-Series backstop kits (XBK series with bore sizes from 7/8 inch through 5 7/16 inches) for direct same-day shipping from Houston.

Applications

Typical applications for Vortex backstops & covers:

• Inclined belt conveyors where reverse rotation under load loss would dump material backwards
• Bucket elevators where reverse rotation would empty the boot at the bottom of the lift
• Screw conveyors handling sticky or bridging materials where backflow is hazardous
• Aggregate and material handling drives where motor power loss must not allow rollback
• Any drive where mechanical anti-reverse protection is required by safety standard or operator practice

Frequently Asked Questions

What reducer is the backstop for?

For VXT shaft mount reducers, choose a VXT-Series backstop kit (2BKS through 10BKS) matched to the VXT size. For X-Series worm gear reducers (X133 through X325), choose an XBK series kit matched to the X-Series unit size and the driven shaft bore.

What bore size do you need?

XBK kits are available for output shaft bore sizes from 7/8 inch through 5 7/16 inches in standard NEMA fractional increments. The bore size of your XBK must match the bore of the bushing kit installed in your X-Series reducer.

Do you also need a backstop cover?

Backstop covers (4BKS CVR, 5BKS CVR, 6BKS CVR) are weatherproofing accessories for the VXT-Series backstop housing when the unit is used outdoors. The cover is sold separately from the backstop kit and is matched to the VXT size.

What reducer family is each backstop for?

Each accessory in this collection is labeled with the reducer family it fits (X-Series, VXT-Series, VR-Series, or VMRV-Series). Filter by reducer family or browse by accessory type. Each product page also indicates the specific reducer size and configuration the accessory matches.

Does Texas Belting and Supply ship from Houston?

Yes. All Vortex backstops & covers in our active inventory ship from Texas Belting and Supply's Houston, TX warehouse the same business day for orders placed before 3 PM Central time, subject to current inventory. Non-stocked configurations may have a 1-3 business day lead time. Call (888) 203-2358 to confirm current stock for any specific part.

How do I know which size accessory I need?

Match the accessory to your existing reducer. The accessory part number prefix tells you the family (VXT vs X-Series vs VMRV vs VR). The number in the SKU tells you the unit size (2-12 for VXT, 30-110 for VMRV, 133-325 for X-Series). If you cannot identify your reducer's exact specification, call (888) 203-2358 with the existing reducer's nameplate information and we will help you spec the right accessory.