CMK2 SR

Product catalog summary

Overview

This document details the technical specifications and dimensional data for the CMK2 Series medium bore pneumatic cylinders, focusing on various cylinder types, mounting styles, and accessory integration including switches and bellows.

1. Cylinder Types and Mounting Styles

The CMK2 Series includes multiple cylinder configurations to suit different installation needs:

Basic Type (00): Standard double-acting cylinders with maximum sensitive positions on rod and head sides.
Axial Foot Types (LB, LS): Cylinders equipped with foot mounts for stable installation.
Flange Types (FA, FB): Rod side and head side flange-mounted cylinders.
Bracket Types (CA, CB): Eye and clevis brackets for pivot mounting.
Fixed Eye Types (CC, CC1): Eye mounting options with or without press-fitted bushings.
Rod Side Trunnion Type (TA): Trunnion mounts on the rod side with bracket options.

2. Dimensional Specifications

Comprehensive dimensional tables are provided for bore sizes 20, 25, 32, and 40 mm, covering:

Basic dimensions (A, B, C, D, etc.) relevant to cylinder size.
Mounting dimensions including LB, LC, LD, LF, LG, LL, MM, MB, KK, and others.
Thread sizes for mounting bolts and ports, ranging from M8 x 1.0 to M26 x 1.5.
Switch installation positions (RD, HD, GC, GD) critical for sensor placement.
Bellows dimensions with formulas for calculating parameters 'd' and 'b' based on stroke length.

3. Switch and Accessory Integration

The cylinders support various switch options such as T1*, T8*, and 2-color indicator switches with preventive maintenance outputs. Specific installation dimensions for switches are referenced, with accessory details available on additional pages.

4. Notes and Recommendations

All dimensions should be rounded up to the nearest decimal or less for accuracy.
Stroke length limitations apply for certain cylinder types, typically up to 50 mm.
Bellows are used for protection and require dimensional adjustments based on stroke length.
Certain mounting points are not intended as piping ports and should be treated accordingly.

5. Critical Parameters and Limitations

Maximum sensitive positions (RD and HD) are essential for correct switch placement.
Precise matching of thread sizes and mounting hole dimensions is mandatory for proper installation.
Stroke length directly influences bellows dimensions and overall cylinder length.
Installation dimensions vary significantly by mounting type and bore size, necessitating careful selection.

6. Summary of Key Dimensions (Example for 20 mm Bore)

Basic dimensions: A=30 mm, B=20 mm, C=13 mm, D=18 mm.
Mounting thread size: M8 x 1.0.
Switch positions: RD=3.0 mm, HD=8.0 mm.
Bellows dimensions: b=30 mm, d=(stroke length/3) + 6 mm.

7. Trunnion Types and Installation Details

Two primary trunnion types are described:

Rod Side Trunnion (TA): Includes dimensions TN, TM, TL, TH, TG, and TD with specified tolerances.
Head Side Trunnion (TB): Detailed dimensions including TB, TE, WF, V, T, MM, MB, LL, KK, HA, K, D, C, B, A, GC, GD, RD, HD, P, P1, and angular parameters.
TB with Bracket (B2): Similar to TB with additional bracket-related dimensions (TS, TR) and adjusted angular values.

8. Dimensional Notes and Tolerances

Dimensions with decimals should be rounded up.
Tolerances for dimension TD range from -0.040 to -0.076 depending on bore size.
Switch and accessory dimensions are detailed on pages 188 and 190.

9. Additional Features

Bellows option affects dimensions 'b' and 'd' and must be considered during installation.
Mounting holes include 4-oval holes sized 7 x 11 mm for secure attachment.
Thread sizes for mounting bolts and ports vary by bore size, including M8, M10, M12, M18, M26, and Rc1/8.

10. Summary of Critical Parameters by Bore Size

Parameter	20 mm Bore	25 mm Bore	32 mm Bore	40 mm Bore
Head Side Trunnion Length (TB)	124 mm	131 mm	131 mm	137 mm
Stroke Length Dependent Dimension (d)	(stroke length/3) + 6	(stroke length/3.25) + 7	(stroke length/3.25) + 7	(stroke length/3.25) + 7
TD Tolerance	-0.040 / -0.076	-0.040 / -0.076	-0.040 / -0.076	-0.040 / -0.076
Mounting Thread Size (LL)	M8 x 1.0	M10 x 1.25	M10 x 1.25	M12 x 1.5
Width Across Flats (KK)	26 mm	35 mm	35 mm	35 mm

Conclusion

This document is a comprehensive reference for engineers and technicians involved in the selection, installation, and maintenance of CMK2 Series medium bore pneumatic cylinders. It provides essential dimensional data, mounting options, tolerances, and accessory integration details necessary for precise mechanical design and application.

Catalog excerpts

CMK2 Series Double acting Dimensions SCP*2 CMK2 Basic type (00) CMA2 MN (2 width) SCM SCG SCA2 SCS CKV2 CA/OV2 MO SSD CAT A X + + stroke length A WF + b P1 WF C HA V MDC2 V 30.5 GD 16 16 GC 30.5 8 MM T P X + stroke length LL + stroke length RD HD SMD2 8 MSD* 2-Rc1/8 FC* STK 8 F (P ) d MVC K 10 XF (with bellows) JSG MB 10 JSC3 2-width across flats U USSD RD: Rod side max. sensitive position HD: Head side max. sensitive position Bore size (mm) 20 25 32 40 Symbol Bore size (mm) 20 25 32 40 USC JSB3 LMB Basic dimensions of basic type (00) A B 20 13 23 17 23 17 25 19 With switch GC 4.0 5.5 5.5 7.0 GD 3.0 4.5 4.5 6.5 C D F HA 18 20 20 22 21.4 26.4 33.6 41.6 28 32 36 45 26 35 35 35 RD HD 8.0 7.0 9.5 8.5 9.5 8.5 11.5 10.5 P 17.3 19.8 24.3 28.3 K KK LL 12 M8 x 1.0 66 14 M10 x 1.25 69 14 M10 x 1.25 69 14 M12 x 1.5 73 With bellows b d P1 (P )° 30 30 19.5 22 32 46 22.0 18 32 46 25.5 15 34 46 29.5 12 MB MM MN MO T U V WF X XF STG M18 x 1.5 M26 x 1.5 M26 x 1.5 M26 x 1.5 10 12 12 14 8 10 10 12 5 5 5 6 5 6 6 7 24 30 34 43 14 16 16 16 24 23 23 23 124 131 131 137 44 46 46 48 STS/L LCS LCG LCM LCT LCY (stroke length/3) + 6 (stroke length/3.25) + 7 (stroke length/3.25) + 7 (stroke length/3.25) + 7 Note 1: For dimensions, round up decimal point or less. Note 2: Refer to page 188 for the HD, RD, and projecting dimensions of the T1* and T8* switches and 2-color indicator switch with preventive maintenance output. Note 3: Refer to page 190 for dimensions of accessories. STR2 UCA2 HCM HCA SRL2 SRG SRM SRT MRL2 MRG2 SM-25 CAC3 UCAC RCC2 MFC SHC GLC Ending Medium bore size cylinder Standard type Symbol ULK* JSK/M2 MB D KK Width across flats B 95

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CMK2 Series SCP*2 Dimensions Axial foot type (LB) CMK2 CMA2 LA + stroke length SCM LA + + stroke length A WF + b SCA2 SCS P1 V LL + stroke length 8 CKV2 RD V 30.5 GD 16 16 GC 30.5 MM P 2-Rc1/8 HD 8 T ) d LI 8 CA/OV2 WF C HA SCG SSD A LF KK D MDC2 (P LH LT CAT 10 10 MVC (with bellows) SMD2 Width across flats B LR LS 4- LD LB LC LC LB LG + stroke length MSD* FC* STK ULK* JSK/M2 JSG JSC3 USSD USC JSB3 LMB STG STS/L LCS Note 1: For dimensions, round up decimal point or less. Note 2: Refer to page 188 for the HD, RD, and projecting dimensions of the T1* and T8* switches and 2-color indicator switch...

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CMK2 Series Double acting Dimensions SCP*2 CMK2 Rod side flange type (FA) CMA2 SCM X + stroke length A X + + stroke length A WF + b C HA WF V 16 GC 30.5 8 MM FP SCG LL + stroke length RD V 30.5 GD 16 2-Rc1/8 HD SCA2 K SCS 8 CKV2 CA/OV2 T d FC FH F SSD CAT MDC2 FL FM (with bellows) 4- MVC D KK FD Width across flats B 10 10 FT FF MB SMD2 FG + stroke length MSD* FC* STK Note 1: For dimensions, round up decimal point or less. Note 2: Refer to page 188 for the HD, RD, and projecting dimensions of the T1* and T8* switches and 2-color indicator switch with preventive maintenance output. Note 3: Refer...

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CMK2 Series Double acting Dimensions SCP*2 CMK2 Fixed eye (CC) Eye bush press fitted type (CC1) CMA2 SCM SCG CA + stroke length A C V MM 30.5 GD 16 16 GC 30.5 8 RD 2-Rc1/8 CM 8 HD CKV2 CDH10 P1 K CA/OV2 P d SSD CAT MDC2 8 KK MVC 10 Width across flats B D F MB (with bellows) SCS U CO T SCA2 LL + stroke length (P ) CA + + stroke length A WF + b WF 10 -0.1 CB CC SMD2 CQ-0.3 CJ + stroke length MSD* FC* STK Note 1: For dimensions, round up decimal point or less. Note 2: Refer to page 188 for the HD, RD, and projecting dimensions of the T1* and T8* switches and 2-color indicator switch with preventive...

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CMK2 Series Double acting Dimensions SCP*2 CMK2 Head side trunnion type (TB) CMA2 SCM SCG X + stroke length C X + + stroke length A WF + b WF LL + stroke length V 16 GC 30.5 8 MM SCS 30.5 GD 16 8 TB HD 2-Rc1/8 HA P1 K P SSD TH d CA/OV2 MDC2 MVC D 8 KK CKV2 CAT (P ) T RD SCA2 V TDd9 A (with bellows) Width across flats B 10 MB 10 TL TE TJ + stroke length SMD2 TM TN TK MSD* FC* STK Note 1: For dimensions, round up decimal point or less. Note 2: Refer to page 188 for the HD, RD, and projecting dimensions of the T1* and T8* switches and 2-color indicator switch with preventive maintenance output....

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