In aluminum profile anodizing production, clamp dimensions directly affect profile loading efficiency, fixture compatibility, and the accuracy of clamp selection.
However, during technical communication and purchasing processes, many users confuse terms such as maximum opening, resting opening, and effective clamping range.
This can lead to selecting a clamp that does not match the actual production requirement.
The KRT-087 Pneumatic Clamp provides three important dimensional specifications:
Overall Length: 135 mm
Resting Opening: 18 mm
Maximum Opening: 81 mm
The 18 mm resting opening and 81 mm maximum opening describe different jaw positions of the clamp. Understanding these specifications helps engineers evaluate aluminum profile geometry, gripping location, and production-line compatibility.
Why Are Opening Dimensions Important for Pneumatic Anodizing Clamps?
Aluminum extrusion manufacturers often process multiple profile designs.
Different profiles may have:
- different cross-sections
- different wall thicknesses
- different gripping edges
- different grooves, ribs, and flange structures
Therefore, pneumatic clamp selection should not be based only on the overall profile width.
During actual production, the clamp contacts a specific area of the extrusion, such as an edge, rib, or designated gripping position.
Ignoring opening specifications may result in:
- difficulty inserting the profile into the clamp
- additional adjustment during loading
- frequent fixture changes
- insufficient rack space
For this reason, understanding clamp opening dimensions is an important part of anodizing fixture selection.
What Does the 18mm Resting Opening Mean?
The KRT-087 has a:
Resting Opening: 18 mm
This specification describes the distance between the jaws when the clamp is in its natural resting condition.
It helps engineers understand the initial position of the clamp structure.
However:
18 mm does not mean the minimum clamping size.
Actual profile compatibility depends on:
- profile thickness
- gripping-area geometry
- jaw contact condition
- extrusion surface structure
For example, two aluminum profiles with the same thickness may require different clamp solutions if one has a flat gripping edge while the other has a raised feature.
Therefore, the correct technical description is:
Resting Opening: 18 mm
rather than:
Minimum Clamping Size: 18 mm
How Does the 81mm Maximum Opening Help Clamp Selection?
The KRT-087 provides a:
Maximum Opening: 81 mm
This specification represents the maximum jaw-opening space when the clamp is fully opened.
In anodizing production, this dimension mainly determines whether the aluminum profile can enter the clamp during loading.
It is especially important for:
- large-section aluminum profiles
- industrial extrusions
- irregular profiles
- ribbed or grooved profiles
However:
Maximum Opening ≠ Maximum Clamping Thickness
The 81 mm specification defines jaw-opening space, not a verified maximum profile thickness.
Actual clamping suitability depends on the profile geometry and gripping position.
Why Is the 135mm Overall Length Also Important?
Many users focus only on jaw opening while ignoring the overall clamp size.
The KRT-087 has an:
Overall Length: 135 mm
This dimension is important for anodizing rack design.
In continuous production lines, multiple clamps are normally installed together.
Engineers need to consider:
- clamp spacing
- profile arrangement
- rack structure
- installation space
The 135 mm overall length provides a reference for evaluating whether the clamp fits the existing production layout.
How to Choose the Right Pneumatic Anodizing Clamp?
1. Select According to the Actual Gripping Position
Do not provide only the overall aluminum profile width.
More useful information includes:
- profile cross-section drawing
- actual gripping area
- gripping-edge size
- loading direction
These details provide better selection accuracy.
2. Match Required Clearance with Maximum Opening
Measure the space required for the profile to enter the clamp and compare it with:
81 mm Maximum Opening
If the required clearance exceeds 81 mm, a larger-opening model should be considered.
3. Check Overall Dimensions for Production Layout
Besides opening size, verify whether:
135 mm Overall Length
fits the existing rack and fixture arrangement.
4. Confirm Irregular Profiles Before Selection
For profiles with grooves, ribs, or asymmetric structures, provide samples or cross-sectional drawings before final clamp selection.
FAQ
Is the 18mm resting opening the minimum clamping size?
No.
The 18 mm specification describes the jaw position when the clamp is in its resting condition.
Actual clamping suitability depends on the profile structure and contact position.
Does the 81mm maximum opening mean the maximum clamping thickness?
No.
The 81 mm value represents the maximum jaw-opening dimension.
Actual clamping capability depends on profile geometry and fixture design.
Why should overall length be considered when selecting a pneumatic clamp?
Because the clamp must be installed within the anodizing production rack system.
The 135 mm overall length affects fixture layout and spacing between neighboring clamps.
What applications is KRT-087 suitable for?
The KRT-087 is designed for aluminum profile anodizing applications including profile holding, positioning, and rack loading.
It is suitable for production environments where clamp selection must match different extrusion geometries.
Conclusion
When selecting a pneumatic anodizing clamp, maximum opening alone is not enough.
The KRT-087 provides three important dimensional references:
18 mm Resting Opening
81 mm Maximum Opening
135 mm Overall Length
Understanding the technical meaning of each parameter allows engineers to select a more suitable clamp solution based on aluminum profile structure, loading requirements, and production-line layout.
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