Enerpac torque multipliers provide a controlled way to generate high output torque from a standard manual torque wrench. The E-Series range is designed for industrial bolting applications where high torque is required but hydraulic, pneumatic, or battery-powered torque tools are unnecessary or impractical.
BuyEnerpac carries Enerpac E-Series manual torque multipliers with maximum output ratings from 750 ft-lb to 8,000 ft-lb. Models are available with either reaction-bar or reaction-plate configurations, along with multiple torque ratios and output square-drive sizes.
Enerpac E-Series Manual Torque Multipliers
Each torque multiplier uses a planetary gear system to multiply the torque applied by the operator. This allows relatively low manual input torque to generate substantially higher output torque at the fastener.
The Enerpac torque multiplier range includes:
- Reaction-bar torque multipliers for applications with an accessible structural reaction point
- Reaction-plate torque multipliers for applications requiring a broader reaction surface
- Maximum output torque capacities from 750 to 8,000 ft-lb
- Torque multiplication ratios ranging from 3:1 to more than 50:1
- 3/4-in, 1-in, and 1-1/2-in output square-drive options
- Manual operation without electrical, pneumatic, or hydraulic power
How to Select an Enerpac Torque Multiplier
Select the proper torque multiplier based on the required fastener torque, available reaction point, input torque-wrench capacity, torque ratio, and square-drive size. The multiplier's maximum input and output torque ratings should never be exceeded.
Reaction configuration is also important. Reaction-bar models work well when a strong reaction point is available at the appropriate location. Reaction-plate models provide a larger reaction surface and can be better suited to applications where a conventional reaction bar cannot be positioned effectively.
Manual Torque Multipliers for Industrial Bolting
Manual torque multipliers are commonly used for maintenance, construction, heavy equipment, manufacturing, energy, structural bolting, and field-service applications. Because they require no external power supply, they can also be useful for remote work or locations where hydraulic pumps, compressed air, or electrical power are not readily available.
For powered high-torque bolting applications, compare our Enerpac hydraulic torque wrenches. You can also browse Enerpac torque wrench accessories for sockets, Allen drives, square drives, reaction arms, reaction paddles, and other bolting components.
Frequently Asked Questions About Torque Multipliers
What does a torque multiplier do?
A torque multiplier uses a geared mechanism to increase the torque produced by a manual torque wrench. For example, a multiplier with a 3:1 ratio produces approximately three times the torque applied at the input, subject to the manufacturer's specified ratings and operating procedure.
Do Enerpac torque multipliers require a hydraulic pump?
No. Enerpac E-Series manual torque multipliers are mechanically operated and do not require a hydraulic pump, compressed air, battery, or electrical power source.
What is the difference between a reaction bar and a reaction plate?
Both provide the reaction force required when using a torque multiplier. A reaction bar contacts a specific reaction point, while a reaction plate provides a wider reaction surface. The best configuration depends on the equipment and available reaction point.
How do I choose the correct torque multiplier?
Start with the required output torque. Then verify the multiplier's maximum output torque, maximum allowable input torque, torque ratio, input drive, output drive, and reaction configuration. The manual torque wrench used to drive the multiplier must also be suitable for the required input torque.
