
Holdbacks are designed to provide protection against reverse torque runaways of inclined conveyors. Speed reducers drive the rolls that move the belt carrying the material that is conveyed.

| • | Automatic engagement and disengagement |
| • | Delayed engagement produces a “no load start” |
| • | No slippage at full running speed |
| • | Controlled soft-start acceleration |
| • | 100% efficient at rated speed |
| • | Standard, spring control, and deep pocket models |
| • | Protection against shock loads during start-up |

| • | Long service life |
| • | Taconite seals |
| • | Removable torque arm |
| • | Superior roller design |
| • | Bore ranges up to 600 mm |
| • | Torque ratings up to 1626 kNm |

| • | 13 different sizes |
| • | Bore range: 6 to 508 mm |
| • | Torque range: 2.1 to 952000 Nm |
| • | Designed for rebuilding – reducing long-term operation costs |
| • | Removable torque arm – easier installation |
| • | Grease labyrinth seals – protect internal components |
| • | Formchrome sprags – longer wear life |
| • | Free action retainer – tolerates larger concentricity fl uctuations |
| • | Full range of options includeing OSHA covers, set collars and restraint keys |

| • | No maintenance |
| • | Standard and reduced moment designs available |
| • | Capable of being torsionally tuned to suit specific machinery requirements |

| • | 35 kN Braking Force |
| • | On-site torque adjustment to precisely match application needs |
| • | “park-off” facility for fast pad changing without special tools |
| • | Spring-Applied – low pressure air release |
| • | Controlled reversal of belt |
| • | Automatic release of belt tension |
| • | Stops in either direction |

| • | 119 kN Braking Force |
| • | On-site torque adjustment to precisely match application needs |
| • | “park-off” facility for fast pad changing without special tools |
| • | Spring-Applied – low pressure air release |
| • | Controlled reversal of belt |
| • | Automatic release of belt tension |
| • | Stops in either direction |

| • | 300 kN Braking Force |
| • | On-site torque adjustment to precisely match application needs |
| • | “park-off” facility for fast pad changing without special tools |
| • | Spring-Applied – low pressure air release |
| • | Controlled reversal of belt |
| • | Automatic release of belt tension |
| • | Stops in either direction |

| • | Easy to install |
| • | Dampens shock loads and vibration variations |
| • | Low torque resistance at start-up |
| • | Load balancing of multi-motor drives |
| • | Reduced initial starting current |
| • | Eliminates special starting devices |
| • | Reverse current braking possible |
| • | Unlimited and extended start-up |
| • | 1:1 Input to output torque ratio |
| • | No mechanical contact of power transmitting components |
| • | Power capacity up to 1000 KW |
| • | 15 sizes available |

| • | Easy to assemble / replace |
| • | Part-for-part interchangeable with industry standard tapered grid coupling designs |
| • | Coupling sizes 1020 through 1140 in-stock in a range of standard bore sizes |
| • | Shot-peened tapered grid flex element for long life |

| • | Conventional V-Belt drives |
| • | Narrow drives (Ultra-V) |
| • | Light-duty drives (FHP) |
| • | Synchronous Plus drives |
| • | QT Power Chain® synchronous belt drives |

| • | No maintenance |
| • | Zero backlash |
| • | Close couple, spacer and floating shaft designs available |
| • | Easy interchangeability |

| • | Unitized Flex Packs |
| • | Easier, faster installation |
| • | Interchangeable with industry standard designs |
| • | Fewer sizes to cover a full range of applications |
| • | Reduced spare parts inventory |
| • | Lower total cost of ownership |
| • | Special designs avaiable for higher-torque applications |

| • | Start/Stop parts have a low inertia which: | |
| - | Reduces acceleration times and allows more cycles per minute | |
| - | Reduces heat generated | |
| • | Air applied clutch with full circle friction discs | |
| • | Extremely fast response | |
| • | Available in 1,2,3 or 4 plate designs to suit torque, heat, response and space requirements. | |
Air connections are non-rotating. For dry use only |
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| • | Designed for high-speed, continuous operation |
| • | View port allows visual confirmation of disconnect/connect status |
| • | Full-speed testing of isolated equipment prior to reconnection |
| • | Operates in adverse atmospheres |
| • | Reduced downtime |
| • | Long Service Life |
| • | Minimum maintenance |

