How do I match a drive to my conveyor?
Size by required belt pull and speed: calculate motor power from tonnage, lift and friction, then select gear ratio and coupling to handle start-up torque.
BST · Drive Components
Backstop (One-way Clutch)
逆止器(单向离合器)
A conveyor backstop — a one-way clutch that stops an inclined belt running backwards on power failure or emergency stop.
- SKU prefixDRIVE-BST
- MOQ1 pc
- Lead time1 month
- StandardBST
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Choose the specs for your application. We will reply with pricing, FOB and lead time for your selection.
Current SKU: DRIVE-BST
Overview
Backstop (One-way Clutch) at a Glance
20–80 mmShaft Ø
500–16000 N·mTorque
DTII / TD75 / ISOStandard
ISO 9001 / MACertified · BST
Usage
Usage
Backstop (One-Way Clutch) — a sprag or roller-ramp clutch on the drive or pulley shaft that lets the conveyor rotate only forward and locks instantly against reverse motion. On inclined conveyors it prevents the loaded belt from running backwards if the drive fails or power is lost, avoiding spillage, damage and injury. Fitted on the low-speed head shaft; not for reversible belts.
Operating conditions
Operating conditions
| Working temperature | Ambient range (-20 °C to +40 °C); gearbox, motor and brake per their own rating — confirm for extreme sites. |
|---|---|
| Dusty environment | Suitable — IP55 / IP65 motors and sealed gearboxes rated for dusty plant duty |
| Moisture & water | Suitable — IP65 motors and sealed gearboxes for outdoor, port and washdown duty |
| Corrosive environment | Powder-coated for ordinary acid or alkali · Galvanized for coastal and semi-outdoor · Stainless for high-salinity and high-humidity sites |
| Certification | MA coal-mine safety certified versions available — confirm the certified SKUs for your project |
| Outdoor use | Suitable — coated and stainless options for coastal and weathering service |
Technical overview
Drive components deliver power from the motor to the pulley. HBXM supplies gearmotors, fluid and grid couplings, and brake units selected to match belt tension, torque and starting load for reliable starts under full burden.
Why use a fluid coupling?
It soft-starts the motor under heavy load, limits inrush current and protects the gearbox from shock during acceleration.
When is a holding brake required?
On inclined conveyors a brake holds the loaded belt stationary when stopped, preventing rollback and protecting the coupling and structure.
Can HBXM supply a complete drive package?
Yes. We bundle motor, gearbox, coupling and brake with the drive pulley so the power train is matched and tested as one set.
What is a torque limiter on a conveyor?
A torque limiter sits between the gearbox and the drive pulley and slips or disengages when torque spikes, protecting the gearbox, shaft and belt from jams and overload.
How do I choose a conveyor belt motor?
Size the conveyor belt motor from belt speed, capacity, lift, friction and starting load, then add margin for cold starts and heavy bulk. We match motor and gearbox to your duty cycle.
Highlights
Features
Shaft Ø
Shaft Ø20–80 mm for the coupling, brake or drum interface.
Backstop clutch
One-way clutch prevents reverse run on an incline.
Torque
Torque rating 500–16000 N·m for reliable holding and braking.
High-efficiency motor
IE2 / IE3 class with class-F insulation for continuous run.
Heavy-duty gearbox
Helical / bevel units sized for belt conveyor torque.
Coupling & brake options
Fluid, gear or backstop per duty requirement.
Quality
1
Motor integrity
Windings and frame tested to specification.
2
Gear accuracy
Teeth cut and hardened for the rated torque.
3
Coupling reliability
Selected for shock and load profile.
4
Finish options
Enclosures / coatings for the plant environment.
FAQ
Frequently asked questions
When does a conveyor need a backstop?
Whenever the belt's lifting component can drive the system backwards — in practice any incline above a few degrees with a loaded belt. Without one, a power trip can run the belt back and bury the tail.
How is it sized?
From the back-driving torque of the loaded belt, with a safety factor. Sizing on motor power, which is a common shortcut, undersizes it.
Where is it mounted?
On the drive shaft, the gearbox output or an intermediate shaft, depending on the torque and the space available. We supply the mounting arrangement with the unit.