Overview

This document provides comprehensive technical specifications and dimensional data for the CMK2 Series medium bore pneumatic cylinders. It covers multiple cylinder types, mounting styles, switch integration, and optional accessories such as bellows, facilitating accurate selection and installation in pneumatic systems.

1. Cylinder Types and Mounting Styles

• Standard Type (00): Basic cylinder with switch options and sensitive position notes (Rod side - RD, Head side - HD).
• Axial Foot Types (LB and LS): Double acting cylinders with axial foot mounting, including installation dimensions and switch compatibility; stroke length limited to 50 mm for some types.
• Flange Types (Rod Side FA and Head Side FB): Flange mounting options with detailed installation and switch mounting dimensions.
• Bracket Types (Eye CA, Clevis CB): Mounting brackets with specific dimensions; some ports are not intended for piping.
• Fixed Eye Types (CC, CC1): Fixed eye mounting with optional brackets and installation dimensions.
• Rod Side Trunnion Type (TA): Trunnion mounting with bracket options, detailed installation dimensions, and switch compatibility.

2. Dimensional Specifications

Extensive tables provide key dimensions for bore sizes 20, 25, 32, and 40 mm, including:

• Bore size-dependent basic dimensions (A, B, C, D, etc.)
• Mounting dimensions (LB, LC, LD, LF, LG, LL, MM, MB, KK, etc.)
• Thread sizes for mounting bolts and ports (M8×1.0 to M26×1.5)
• Switch mounting positions and dimensions (RD, HD, GC, GD)
• Stroke length-dependent dimensions, especially for bellows (e.g., dimension 'd' = stroke length/3 + 6 mm for 20 mm bore)

3. Switch and Accessory Integration

Switch mounting dimensions are provided for each cylinder type, ensuring compatibility with various switch models (T1*, T8*, 2-color indicator switches). References to additional pages detail switch and accessory dimensions for precise installation.

4. Bellows Option

Optional bellows for cylinder protection are available, with installation dimensions expressed as functions of stroke length (e.g., (stroke length/3) + 6 mm). Bellows increase overall cylinder length and must be considered in mounting design.

5. Notes and Recommendations

• Dimensions should be rounded up to the nearest decimal or less to ensure proper fit.
• Some ports are not intended for piping; verify before use.
• Stroke length limitations apply for certain mounting types (e.g., axial foot type limited to 50 mm stroke).
• Consult referenced pages for detailed switch and accessory dimensions before finalizing design.

6. Critical Parameters and Limitations

• Precise matching of thread sizes and mounting hole dimensions is essential for secure installation.
• Switch sensitive positions (RD and HD) are critical for sensor placement and cylinder operation.
• Bore size selection directly affects all dimensional parameters and mounting options.
• Bellows installation requires allowance for increased length based on stroke.

7. Technical Specifications for Double Acting Cylinders

• Bore Sizes: 20, 25, 32, and 40 mm.
• Stroke Length Dependent Dimensions: Dimension 'd' varies with bore size and stroke length (e.g., (stroke length/3) + 6 mm for 20 mm bore; (stroke length/3.25) + 7 mm for others).
• Bellows Dimensions: Dimension 'b' is 30 mm for 20 mm bore and 46 mm for larger bores; dimension 'd' increases accordingly.

8. Trunnion Types and Installation Details

• Rod Side Trunnion (TA): Bore size-dependent dimensions with rounding rules and switch/accessory references.
• Head Side Trunnion (TB): Detailed installation dimensions including lengths, thread sizes, angular parameters, and tolerances.
• Head Side Trunnion with Bracket (Option B2): Similar to TB type with additional bracket installation parameters and specified tolerances.

9. Additional Features and Symbols

The document lists various symbols and accessory codes (e.g., SCP*2, CMK2, CMA2, SCM, SCG) representing cylinder models, switch types, or accessory options, aiding identification and specification.

10. Best Practices and Recommendations

• Always round up decimal dimensions to ensure proper fit and avoid installation issues.
• Verify thread sizes and tolerances carefully to ensure compatibility with mounting hardware.
• Consult referenced pages for detailed switch and accessory dimensions prior to final design.
• Consider stroke length impact on dimensions, especially when using bellows or specific mounting types.

Summary

This document is a detailed reference for engineers and technicians specifying CMK2 Series medium bore pneumatic cylinders. It ensures accurate selection of cylinder types, mounting styles, switch integration, and accessories by providing precise dimensional data, critical parameters, and installation guidelines.