Description of Clamp Levers for Engineers

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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.



Advantages of using clamp levers

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

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.
>>Miniature Clamp Lever Series

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

Shaft position adjustment

Workpiece fixing



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 Cost
Lightweight


Thread Part Material Characteristics
Steel High Strength
Low 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.

Universal Design

This clamp lever design incorporates the 7 principles of Universal Design.
>>About Universal Design

Universal Design Series
LUDM(Male Screw/Threaded Part Steel)
LUDMS(Male Screw/Threaded Part Stainless Steel)
LUDF(Female Screw/Threaded Part Steel)
LUDFS(Female Screw/Threaded Part Stainless Steel)

Lineup by Features

Material Screw Type Rotating Radius Characteristics
Lever Material Thread Material Standard With Push Button Universal
Design
Plastic Steel Male Screw Standard LEM
LEME
LEM-C LUDM
Compact LECM LECM-C  
Female Screw Standard LEF
LEFE
LEF-C LUDF
Compact LECF LECF-C  
Stainless Steel Male Screw Standard LEMS LEMS-C LUDMS
Compact LECMS LECMS-C  
Female Screw Standard LEFS LEFS-C LUDFS
Compact LECFS LECFS-C  

Selection Navigator

Our convenient "Selection Navigator" 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.

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Length Adjustment

Screws can be cut to your desired length in 1mm increments.



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Screw Combination

Levers/clamp levers’ female screws are bonded with screws by anaerobic adhesive agent and fixed with pins.


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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.

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Special Products

Come to us for production of non-standard clamp levers as well, including lever part color changes and special shapes.



Description of Mechanical Components for Engineers

Customer Service

  • Usage Method
  • Technical Question
  • Customization Products
USA and Canada

NBK America LLC

9:00 to 17:00 on weekdays, Eastern Standard Time

Asia and Europe

Nabeya Bi-tech Kaisha

9:00 to 17:15 on weekdays, Japan Standard Time