Stieber backstops
Sprag and roller-ramp overrunning clutches and backstops that transmit torque in one direction and freewheel or lock in the other. Addresses reverse-runback on inclined conveyors, elevators, pumps, and fans, and wear-free overrunning at high speed via centrifugal sprag lift-off. SES holds the range as an authorised Regal Rexnord distributor, covering types Sprag freewheel and roller-ramp; rsbw DC sprag, plain-bearing, sealed; high-speed Centrifugal lift-off sprags (RDBK); function Backstopping, overrunning, indexing. Executions include RSBW sprag freewheel, RIWS/RINS bearing-supported, RDBK high-speed backstop, RDBR-E roller-ramp low-speed, among others. It is specified most often into inclined belt conveyors and bucket elevators. Every part is genuine Regal Rexnord through official channels, with designation, specification and options confirmed against your duty before it ships — supplied from Kolkata and our branch network, with breakdown cover that does not sit in an inbox.
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Principle
Sprag / roller-ramp, one-way
Function
Backstop, overrun, indexing
Feature
Centrifugal lift-off (high speed)
Types
Sprag freewheel and roller-ramp
Where it runs.
You will find Stieber backstops in the parts of a plant where this particular duty actually occurs. In practice that means inclined belt conveyors, bucket elevators, pumps and fans, and equally gearbox backstopping, cooling towers, mine winders. What links them is the duty rather than the machine name — principle: Sprag / roller-ramp, one-way. If your installation is not on that list it matters less than you would think: the operating condition decides the specification. Send us the load, the speed, the running temperature and the environment it runs in, and we will match it to the right execution in the Regal Rexnord range and confirm what is in stock.
Specify it against the duty.
Specification here follows the operating condition, not the catalogue. High-speed overrunning (wear concern) — RDBK centrifugal lift-off sprag backstop Low-speed conveyor, load sharing — RDBR-E roller-ramp limiting backstop Simple low-speed backstop/freewheel — RSBW sprag freewheel (plain-bearing) Where two of those apply at once, specify for the harsher of the two — under-specifying is what puts the part back on the bench a month later. Send us the duty and we will confirm the execution.
Ordering this from SES.
Freewheeling direction is fixed at build; confirm rotation before fitting, since a backstop installed backwards locks the drive solid. Stock the torque-arm/bracket with the unit. Send the designation off the failed part and we will confirm the Regal Rexnord equivalent and stock position.