Description of Clamping Screws for Engineers

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What are clamping screws?

Clamping screws are mechanical elements which use screw thrust for workpiece fixing and positioning.
Point contact by the full ball securely fixes the workpiece.
They include several varieties of tip ball shape and material, which can be selected according to the application.
As well, hex socket head cap screw type clamping bolts have functions similar to clamping screws.

Advantages of using clamping screws

By replacing hex socket head cap screws and hex socket set screws with clamping screws or clamping bolts when clamping (fixing) workpieces, point contact with workpieces can be achieved. This effectively transmits force to the workpiece and keeps the clamp secure.

As well, when clamping inclined workpiece surfaces, use the flat ball type in order to allow the tip ball to rotate freely, so that the ball flat surface makes surface contact with the workpiece inclined surface, achieving secure clamping.

Usage examples of clamping screws

For workpiece fixing.

For tool fixing.

Less time and trouble spent on manufacturing workpiece fixing jigs and maintenance

When fixing the workpiece by clamping its inclined surface, the jig body must be machined to match the workpiece shape.
However, with clamping screws, the jig body just needs screw threading. Jig body shapes can be made more simple.
In addition, if the workpiece contact surface wears, just replace the clamping screw. The time and trouble of maintenance is reduced.

Types and features of clamping screws

There are several varieties of shapes and materials, which can be selected according to the application.

Ball shape

There are 4 ball-shaped tip types.
①Full ball: Point contact fixes the workpiece. Low cost.
②Flat ball: Large contact surface area, does not damage the workpiece.
③Flat ball/limited swivel type: Structure of the flat surface does not swivel over.
④Knurled ball/limited swivel type: Secure clamping even on rough surfaces such as castings.

   Complete Ball Type List                Flat Ball Type List          Flat Ball Type (Limited Swivel) List         Knurled Ball Type List    

Ball Material

There are 5 tip ball material types.

Material Hardness Characteristics
Steel 55-60HRC      Cost effectiveness is excellent.
Stainless Steel 55-60HRC Corrosion and heat resistance are excellent.
Polyacetal     94HRM To avoid damaging workpieces.
Brass 75-125HV To avoid damaging workpieces.
Ceramic 1100HV With electrical insulating properties, it has excellent wear resistance.

 

Clamping Screws List

Body shape
Material Full Ball Flat Ball Flat Ball
Limited Swivel Type
Knurled Ball
Limited Swivel Type
Body Material Ball Material
Set Screw Made of Steel Made of Steel

SCS-R
SCS-R
SCS-F-R(Fine Screw Thread)

SCS-F
SCS-F
SCS-F-F(Fine Screw Thread)

SCS-FB
SCS-FB

SCS-GB
SCS-GB

Made of Plastic

SCS-N
SCS-N

 

 

 

Made of Brass

SCS-BR
SCS-BR

 

 

 

Made of Stainless Steel Stainless Steel

SCSS-R
SCSS-R

SCSS-F
SCSS-F

SCSS-FB
SCSS-FB

SCSS-GB
SCSS-GB

Made of Ceramic

SCSS-CE
SCSS-CE

 

 

 

Hex Socket
Head Cap Screw
Made of Ceramic Made of Ceramic

SCB-R
SCB-R

SCB-F
SCB-F

SCB-FB
SCB-FB

SCB-GB
SCB-GB

Made of Stainless Steel Made of Stainless Steel

SCBS-R
SCBS-R

SCBS-F
SCBS-F

SCBS-FB
SCBS-FB

SCBS-GB
SCBS-GB

Made of Ceramic

SCBS-CE
SCBS-CE

 

 

 

Additional Service

To make clamping screws compatible with a wider range of applications, various additional modification services are available as standard.
Orders from one piece up can be handled with short delivery times.

Screw Combination

Lever and knob female thread products are adhered to screws with anaerobic glue, and then fixed with pins.




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Vibration Resistance

Anti-loosening treatments for screws are available. These are beneficial for applications requiring anti-loosening screw operations or sealing. Our anti-loosening treatments save you the trouble of applying adhesive or sealing tape.

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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

We also produce products of special specifications, e.g. nominal diameter of thread, length and surface treatment.



Description of Mechanical Components for Engineers

Customer Service

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USA and Canada

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Asia and Europe

Nabeya Bi-tech Kaisha

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