Date Published:Sep. 11. 2017 Date Updated:Nov. 06. 2024
What are clamp levers? Here we explain the characteristics and usage methods that help streamline screw tightening!
➡To [Description of Mechanical Components for Engineers]
What are clamp levers?
Clamp levers are mechanical components which allow efficient tightening and loosening of screws by turning the lever without the use of tools. Their best feature is the ability to work in tight spaces: just pull up the lever to release the threaded serration engagement (This will stop the screw from turning even if the lever is rotated).
Clamp Lever Structure
① Since the lever and threaded serration are normally engaged, turning the lever causes the screw to rotate simultaneously.
② Pulling up the lever releases the threaded serration engagement (the screw will stop turning when the lever is rotated).
③ Releasing the lever allows it to return automatically to lever and threaded serration engagement position due to the built-in spring force.
Only takes a minute to understand! How to Use Clamp Levers.
Using the features of the clamp lever ・・・
Screws can be tightened in places where the lever cannot rotate 360°.
After screw tightening, the lever position can be moved aside to keep it out of the way.
Solve your problems with clamp levers!
NBK clamp levers resolve customer issues.
Find examples introduced here.
・Frequent work with bolts takes time and causes trouble
・With space limitations, tools don't reach the work location and workability is poor
・Work locations for fixing need to be made clear at a glance
Frequent work with screws and bolts takes time and causes trouble
Higher work efficiency without tools
The use of clamp levers increases work efficiency, since tools such as wrenches and spanners used on screws are no longer required. Clamp levers are efficient in places where screws are frequently handled, such as equipment changeover.
Space-saving for equipment
Space-saving for equipment
With a smaller rotating radius than normal tools, screw operation space can be reduced. The NBK miniature clamp lever series, with an even smaller rotating radius, provides optimum space-saving for equipment. >>Clamp Lever - Miniature Type Standard List >>Clamp Lever - Miniature Type Flat Type List
Work locations for fixing need to be made clear at a glance
Easily standardize work
NBK clamp levers are available in a wide variety of colors. This contributes to work standardization by drawing attention to the area of operation, clarifying operation procedures with different colors, and so on.
Examples of clamp lever applications
Application Examples
Shaft position adjustment
Workpiece fixing
Example Use Cases
Printing machinery
Application： Alignment adjustment for printing position
Product name：LDME, etc.
Food/packaging machinery
Application： Keeping equipment clean, helping prevent dust and debris from gathering
Product name：LDMS-AS, etc.
Types and Features of Clamp Levers
An abundant lineup is available from standard to unique products. NBK will provide the clamp levers that meet your particular requirements.
Material Types
Lever materials include zinc die-cast, stainless steel, and plastic; materials for the threaded part include steel and stainless steel.
Material Types and Features
| Material Types and Features | Characteristics |
|---|---|
| Zinc Die Cast | High Strength |
| Stainless Steel | High Corrosion Resistant |
| Plastic | Low CostLightweight |
| Thread Part Material | Characteristics |
|---|---|
| Steel | High StrengthLow Cost |
| Stainless Steel | High Corrosion Resistant |
Screw Types
The two basic screw types are male and female.
Rotating Radius Types
The two types of rotating radiuses are "Standard" and "Compact". The rotating radius for the "Standard" type varies, depending on the screw size, over a range from 45 mm to 108 mm. The rotating radius for the "Compact" type is 30 mm for all sizes.
Function Types
Along with standard clamp levers, NBK also offers clamp levers with unique functions as an option.
With Push Button
The push button allows easy application of force when pulling up the lever, making operation easier. The push button shape has no holes, helping prevent the accumulation of dust and dirt.
Clamp Lever with Built-in Washer
Clamp lever with washer built-in. When assembling to equipment, washer assembly is not required, keeping washers from falling out. Three types of washers are now available as standard. Select according to the usage application.【Integrated Spring Washer Type】
Washer assembly is not required, preventing washers from falling out. Remove the plain washer to replace the spring washer with a different washer component.
【Integrated Plain Washer Type】
For reduction of seating surface pressure in materials with low limit surface pressure, such as resin and aluminum parts. Also ideal for ensuring seating surfaces when tightening slotted holes, etc.
【Integrated Flat Washer Type for Slotted Holes】
The pointer engraved on the top surface enables easy position confirmation when tightening slotted holes. The projection on the washer surface prevents the washer from rotating.
Metal Detectable
Clamp lever with metal powder admixed into the lever part resin, enabling detection with a metal detector.For industries such as food manufacturing where contamination must be strictly prevented.
LEMS-MD（Male Screws）
LEFS-MD（Female Screws）
Universal Design
This clamp lever design incorporates the 7 principles of Universal Design. ＞＞About Universal DesignLineup by Features
clamplever Lineup by Features
Product Finder
Our convenient "Product Finder" enables rapid searching for your desired products.
Additional Service
To make NBK products compatible with a wider range of applications, various additional standard modifications are available. Orders of one piece or more can be processed for quick delivery.
Laser Engraving
Various marks and letters are laser-engraved on Clamp Levers. This is a service to make the NBK products even easier to use in terms of functionality by engraving marks such as OPEN, CLOSE, and arrows.
Length Adjustment
Screws can be cut to your desired length in 1mm increments.
Screw Combination
Levers/clamp levers’ female screws are bonded with screws by anaerobic adhesive agent and fixed with pins.
Cleanroom Services
We can wash and pack your products in a cleanroom. This is suggested for products used in FPD production devices, semiconductor manufacturing devices, medical equipment, food and beverage machinery and even products that will be used in cleanrooms.
Special Products
Come to us for production of non-standard clamp levers as well, including lever part color changes and special shapes.
Find related articles on Clamp Levers here
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Using the Clamp Lever / Tension Lever
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Designs and Examples of What NBK Can Create
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Preventing lever fragments from contaminating food machinery
Description of Mechanical Components for Engineers
