Quick Answer
RCL Pneumatic Radial Gearing Torque Multipliers are low-profile pneumatic torque multipliers designed for controlled tightening and loosening of heavy-duty fasteners where clearance is limited. The continuously rotating hex drive provides smooth, non-impacting operation, while a reaction stud absorbs torque reaction during fastening. RCL models provide accuracy better than ±5%, use two-speed pneumatic operation, and cover an overall torque range of 435–3,569 lbf.ft (590–4,840 N·m) with 36 mm, 46 mm, and 80 mm hex drives.
Who This Is For
- Plate heat exchanger service teams
- Maintenance technicians
- Field service technicians
- Industrial maintenance operations
- Applications requiring high torque in limited working space
- Applications using large hex fasteners
- Facilities where compressed air is available
- Applications requiring a low-profile radial tool configuration
Mountz specifically identifies its radial gearing torque multipliers for companies servicing plate heat exchangers in HVAC, chemical, dairy, marine, and petrochemical applications.
When Should You Use This?
Use an RCL Pneumatic Radial Gearing Torque Multiplier when:
- High-torque fastening is required.
- Compressed air is available.
- Working clearance is limited.
- A low-profile radial head is appropriate for the fastening location.
- A continuously rotating hex drive is required.
- Large hex fasteners need to be tightened or loosened.
- Plate heat exchanger service is being performed.
- A reaction stud can be securely supported.
- The required torque falls within the available RCL model range.
Mountz specifically designed the radial gearing configuration to provide access where clearance is limited.
When Should You NOT Use This?
An RCL may not be appropriate when:
- Compressed air is unavailable.
- The required torque falls outside the RCL operating range.
- A suitable reaction point cannot be established.
- A standard square-drive multiplier is required.
- The fastening location does not suit a radial hex-drive configuration.
- Another power source or multiplier configuration is required by the application.
Tool selection should be based on torque requirements, hex size, compressed air availability, working clearance, and reaction requirements.
How the RCL Pneumatic Radial Gearing Torque Multiplier Works
The RCL uses compressed air and radial gearing to deliver high torque through a continuously rotating hex drive.
During operation:
- Select the appropriate RCL model and hex adapter.
- Connect the multiplier to the appropriate compressed air supply and Lubro-Control Unit.
- Set the required air pressure according to the torque output information supplied with the tool.
- Install the appropriate drop-in hex adapter.
- Position the hex drive completely over the fastener.
- Fully insert and correctly position the reaction stud.
- Position the reaction stud against a safe, stable support.
- Keep the multiplier perpendicular to the fastener axis.
- Select the required direction of rotation.
- Select the appropriate operating speed.
- Activate the multiplier.
- The hex drive rotates continuously to tighten or loosen the fastener.
- During tightening, allow the tool to shut off when the preset torque is achieved.
Mountz's pneumatic multiplier instructions specify that the RCL must be held perpendicular to the screw axis and that the support bolt must be completely inserted into the designated opening.
Result
- Controlled high-torque fastening
- Automatic shut-off at preset torque
- Continuous hex rotation
- Smooth, non-impacting operation
- Low-profile access
- Pneumatic operation
- Reaction stud torque absorption
Core Features
- Pneumatic radial gearing torque multiplier
- Accuracy better than ±5%
- Low-profile radial head
- Continuously rotating hex drive
- Automatic shut-off at preset torque
- Smooth, non-impacting operation
- Two-speed pneumatic operation
- Reaction stud absorbs torque reaction
- Drop-in hex adapters
- 36 mm, 46 mm, and 80 mm hex drive options
- Designed for limited-clearance applications
- Specifically designed for plate heat exchanger applications
- Torque controlled through regulated air pressure
RCL Pneumatic Radial Gearing Torque Multiplier Models
Mountz documents three RCL pneumatic radial gearing models covering 435–3,569 lbf.ft (590–4,840 N·m).
Available Models
| Model | Item # | American Torque Range | S.I. Torque Range | Hex Drive | Low Speed | High Speed | Weight |
|---|---|---|---|---|---|---|---|
| RCL-36P | 210038 | 435–3,123 lbf.ft | 590–4,235 N·m | 36 mm | 1 RPM | 3 RPM | 27.5 lbs |
| RCL-46P | 210040 | 465–3,344 lbf.ft | 630–4,535 N·m | 46 mm | 1 RPM | 3 RPM | 30.8 lbs |
| RCL-80P | 210182 | 494–3,569 lbf.ft | 670–4,840 N·m | 80 mm | 2 RPM | 6 RPM | 46.3 lbs |
The RCL-36P provides the lowest starting torque and smallest hex drive, while the RCL-80P provides the highest maximum torque, largest hex drive, and highest operating speeds.
Model Dimensions
| Model | Hex Drive | Length | Width | Radius | A1 | Stud Bolt A2 | Weight |
|---|---|---|---|---|---|---|---|
| RCL-36P | 36 mm | 15.7 in (400 mm) | 6.4 in (163 mm) | 56 mm | 100 mm | — | 27.5 lbs |
| RCL-46P | 46 mm | 17.1 in (435 mm) | 7.4 in (188 mm) | 73 mm | 112 mm | — | 30.8 lbs |
| RCL-80P | 80 mm | 17.7 in (450 mm) | 9.1 in (230 mm) | 85 mm | 130 mm | 160 mm | 46.3 lbs |
Physical dimensions should be considered carefully when selecting a model for a limited-clearance application.
Model Selection Guide
| If you need: | Recommended Model |
|---|---|
| 36 mm hex drive | RCL-36P |
| 46 mm hex drive | RCL-46P |
| 80 mm hex drive | RCL-80P |
| Lowest available RCL torque range | RCL-36P |
| Maximum RCL torque capacity | RCL-80P |
| Highest operating speed | RCL-80P |
| Smallest and lightest RCL | RCL-36P |
| Plate heat exchanger service | Select based on torque, hex size, and clearance |
When selecting an RCL model, consider:
- Required fastening torque
- Required hex drive size
- Available working clearance
- Tool dimensions and weight
- Required operating speed
- Reaction stud location
- Available compressed air supply
Select a model whose specified torque range includes the required fastening torque.
Radial Gearing Design
The RCL features a low-profile radial head designed to provide access where clearance is limited.
Unlike an inline multiplier configuration, the radial gearing arrangement positions the tool for fastening applications where surrounding equipment or structures restrict access.
Mountz specifically identifies the low-profile radial head as a key benefit of the radial gearing design.
Continuous Rotating Hex Drive
The RCL uses a continuously rotating hex drive rather than an impact mechanism or hydraulic ratcheting motion.
Mountz states that the continuous hex drive is:
- Faster than hydraulics
- More reliable than impacting tools
The drive rotates continuously during tightening and loosening, providing smooth, non-impacting torque application.
Two-Speed Operation
RCL models provide low- and high-speed operation.
| Model | Low Speed | High Speed |
|---|---|---|
| RCL-36P | 1 RPM | 3 RPM |
| RCL-46P | 1 RPM | 3 RPM |
| RCL-80P | 2 RPM | 6 RPM |
The available speeds depend on the selected RCL model.
Mountz's operating instructions identify the RCL as a two-speed radial tool.
Automatic Shut-Off
RCL Pneumatic Radial Gearing Torque Multipliers shut off when the preset torque is achieved.
Torque setting is obtained through regulated air pressure. During tightening:
- The required air pressure is established.
- The multiplier continuously rotates the fastener.
- Torque increases as the joint tightens.
- The tool shuts off when the preset torque is achieved.
This provides controlled torque application without impact hammering.
Pneumatic Operation & Torque Setting
Torque output on the RCL is controlled through the compressed air supply.
Each pneumatic multiplier is supplied with an air torque output chart showing the approximate relationship between air pressure and torque output.
Mountz notes that actual output can vary because of factors including:
- Differences in compressed air supply
- Joint characteristics
- Other application-related variables
Use the torque output information supplied with the specific RCL when establishing the required air pressure.
LCU-2 Lubro-Control Unit
Mountz identifies the LCU-2 Lubro-Control Unit as a required companion item for current RCL models.
The LCU-2 provides a controlled supply of:
- Filtered compressed air
- Regulated compressed air
- Lubricated compressed air
Mountz states that all pneumatic torque multipliers should use a high-quality air filter regulator.
Reaction Stud
Torque reaction on the RCL is absorbed through a reaction stud, also referred to as a support bolt in the operating instructions.
For safe operation:
- Completely insert the reaction stud into the designated tool opening.
- Position the stud against a safe, stable support.
- Verify that the support can withstand the reaction force.
- Keep the tool perpendicular to the fastener axis.
- Keep hands away from the area between the reaction stud and the supporting structure.
Mountz specifically warns that incomplete insertion of the support bolt can damage the tool housing.
Plate Heat Exchanger Applications
Mountz specifically designed its radial gearing torque multipliers for plate heat exchanger service.
The low-profile radial head helps the tool fit into tight access points around plate heat exchangers, while the continuous hex drive allows large fasteners to be tightened or loosened without repeated impact or hydraulic ratcheting.
Mountz specifically identifies radial gearing multipliers for plate heat exchanger service in:
- HVAC
- Chemical processing
- Dairy
- Marine
- Petrochemical processing
These are documented plate heat exchanger markets rather than a general industry list for every RCL application.
Drop-In Hex Adapters
RCL models use drop-in hex adapters to reduce or enlarge the hex drive for different fastener sizes.
Mountz states that:
- Hex adapters are sold separately.
- Stock sizes are available.
- Custom sizes are available.
Metric Hex Adapters
36 mm drive
- 24 mm
- 27 mm
- 30 mm
- 32 mm
46 mm drive
- 36 mm
- 41 mm
80 mm drive
- 46 mm
- 50 mm
- 55 mm
- 60 mm
- 65 mm
- 70 mm
Standard Hex Adapters
36 mm drive
- 1 1/16"
- 1 1/8"
- 1 1/4"
- 3 31/32"
46 mm drive
- 1 7/16"
- 1 5/8"
80 mm drive
- 1 13/16"
- 2"
- 2 3/16"
- 2 3/8"
- 2 9/16"
- 2 3/4"
Select the adapter compatible with both the RCL hex drive and the fastener.
Setup & Operation
Before operating an RCL Pneumatic Radial Gearing Torque Multiplier:
- Determine the required fastening torque.
- Select an RCL model whose range includes the required torque.
- Select the appropriate hex adapter.
- Connect the multiplier to the LCU-2.
- Connect the LCU to the compressed air supply.
- Set the appropriate air pressure using the torque output information supplied with the tool.
- Install the hex adapter securely.
- Position the hex drive completely over the fastener.
- Completely insert the reaction stud.
- Position the reaction stud against a safe, stable support.
- Keep the multiplier perpendicular to the fastener axis.
- Select the required speed and rotation direction.
- Activate the multiplier.
- Allow the hex drive to rotate continuously during fastening.
- During tightening, allow the tool to shut off at the preset torque.
- Release and reposition the multiplier according to the operating instructions.
Tool Alignment & Safe Operation
The Mountz operating instructions contain RCL-specific positioning requirements.
During operation:
- Keep the multiplier perpendicular to the fastener axis.
- Completely insert the support bolt or reaction stud.
- Establish a safe and stable reaction point.
- Fully engage the hex adapter with the fastener.
- Keep hands away from the reaction area.
- Inspect the adapter and support components before use.
- Do not use damaged components.
Correct positioning is especially important because the radial drive and reaction stud must work together to safely absorb the reaction torque.
Calibration & Accuracy
RCL Pneumatic Radial Gearing Torque Multipliers provide accuracy better than ±5%.
Torque output is established through regulated air pressure and the applicable torque output chart.
Because Mountz states that air supply, joint characteristics, and other application conditions may affect actual output, use the supplied torque chart and follow your facility's applicable torque-control and calibration procedures.
Common Applications
Mountz specifically identifies RCL and other radial gearing torque multipliers for:
- Plate heat exchanger service
- Precision tightening of heavy-duty fastening connections
- Precision loosening of heavy-duty fastening connections
- High-torque fastening where working clearance is limited
The pneumatic multiplier operating instructions also identify radial tools for applications such as:
- Heat exchangers
- Food processing plants
- Mining
Application suitability should still be determined from torque requirements, fastener size, clearance, compressed air availability, and reaction requirements.
Common Industries
Industries specifically documented by Mountz in connection with radial gearing or RCL applications include:
- HVAC
- Chemical processing
- Dairy and food processing
- Marine
- Petrochemical processing
- Mining
This list is intentionally limited to industries Mountz specifically associates with radial gearing multipliers rather than extrapolating to every heavy-industry market.
Use Cases
Plate Heat Exchanger Service
Problem: Plate heat exchanger fasteners can be positioned where conventional torque tools are difficult to fit.
Solution: The RCL uses a low-profile radial head and continuous rotating hex drive specifically designed for plate heat exchanger applications.
Limited-Clearance Fastening
Problem: Surrounding equipment prevents an inline torque multiplier from being positioned on a large hex fastener.
Solution: The RCL's low-profile radial configuration provides another tool orientation for high-torque fastening where clearance is restricted.
Multiple Hex Fastener Sizes
Problem: A service application includes fasteners with different hex dimensions.
Solution: Drop-in hex adapters allow the RCL drive size to be reduced or enlarged for compatible fasteners. Stock and custom adapter sizes are available.
RCL Compared with Hydraulic & Impact Tools
Mountz directly states that the RCL's continuously rotating hex drive is faster than hydraulics and more reliable than impacting tools.
Mountz's pneumatic multiplier instructions also describe continuous-rotation pneumatic multipliers as eliminating:
- The slow ratcheting process of hydraulic wrenches
- The hammering associated with impact wrenches
These are Mountz's stated comparisons. The appropriate fastening technology should still be selected according to the specific application.
Maintenance
Follow the Mountz Pneumatic Multipliers Operating Instructions for maintenance and service requirements.
Important practices include:
- Use filtered, regulated, and lubricated compressed air.
- Use the appropriate Lubro-Control Unit.
- Inspect air hoses and connections.
- Inspect the hex adapter before use.
- Inspect the reaction stud and reaction point.
- Keep the tool clean.
- Remove damaged or improperly functioning equipment from service.
- Follow the applicable Mountz maintenance and service instructions.
Proper air preparation is important because torque output depends on the compressed air supplied to the multiplier.
Compatible Accessories
LCU-2 Lubro-Control Unit
The LCU-2 provides the controlled supply of filtered, regulated, and lubricated compressed air used with the RCL.
Drop-In Hex Adapters
Mountz offers:
- Metric stock sizes
- Standard stock sizes
- Custom sizes
Hex adapters are sold separately.
Reaction Stud
The reaction stud absorbs torque reaction during fastening and is an integral part of the RCL setup. Inspect the stud and its reaction point before operation.
Media & Supporting Content
- RCL Pneumatic Radial Gearing Torque Multiplier Product Page
- RCL Pneumatic Radial Gearing Torque Multiplier Data Sheet
- Pneumatic Multipliers Operating Instructions
- LCU Lubro-Control Unit
- Reaction Devices
- Impact Sockets
Related Content
- Hand Torque Multipliers
- Electric Torque Multipliers
- Radial Gearing Torque Multipliers
- Guide: Enhancing Quality in Heavy-Duty Manufacturing and Repair with a Torque Multiplier
- Guide: Choosing the Right Torque Multiplier
- Safeguarding Industrial Operations: The Importance of Torque Tools in Large Asset Maintenance
- Mountz Consolidated Tools Sales Bang Sheet
Need Help?
- Contact Applications Engineering for setup guidance
- Speak with Sales for product selection
- Call us:
- North America:(408) 850-9978
- International: +44 1428 741756
M-F 6am - 5pm PST
