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CKS series

Product catalog summary

Overview

The document provides detailed technical information on the CKS and CKSF Series Thin Chucks, which are pneumatic 3-jaw grippers designed for precise and compact gripping applications. These grippers feature a very thin body design, simple direct drive mechanisms, and options for hollow or large body types, making them suitable for confined spaces and various industrial uses.

Key Features

Thin Body Design: Internal cylinders are positioned toward the workpiece side, enabling jaw motion parallel to the cylinders and reducing gripper thickness by half.
Simple Structure: Uses a direct drive mechanism instead of a worm drive to minimize hooking problems and reduce motion failure due to grease shortage.
Variants: Available in standard and hollow body types, with optional workpiece pushers including 3-point pushers for stable loading.

Specifications

Model	Cylinder Diameter (mm)	Working Pressure (MPa)	Lubrication	Ambient Temperature (°C)	Total Jaw Stroke (mm)	Internal Volume (cm³/time)	Repeatability (mm)	Weight (kg)
CKS-08AS	6×6	0.2 to 0.7	Not Required or Turbine Oil Class 1 (ISOVG32)	5 to 60	1.2	0.16	±0.01	0.16
CKS-12AS	10×10	0.2 to 0.7	Same as above	5 to 60	3.5	0.26	±0.01	0.26
CKS-16AS	12×16	0.2 to 0.7	Same as above	5 to 60	7.6	0.44	±0.01	0.44
CKS-20AS	16×20	0.2 to 0.7	Same as above	5 to 60	15.5	0.66	±0.01	0.66
CKS-25AS	20×25	0.2 to 0.7	Same as above	5 to 60	33.8	1.17	±0.01	1.17
CKS-32AS	25×32	0.2 to 0.7	Same as above	5 to 60	62.2	1.82	±0.01	1.82
CKSF-50AS	40×50	0.2 to 0.7	Same as above	5 to 60	242	5.76	±0.01	5.76

Performance Data

Graphs illustrate grip force (in Newtons) versus external finger length (in cm) for various models under different air pressures (0.3, 0.5, 0.7 MPa) in both open and closed states. Key observations include:

Grip force decreases as external finger length increases.
Higher air pressure results in greater grip force.
Closed jaw grip force is generally higher than open jaw grip force at the same pressure.

Optimal grip force ranges vary by model, for example:

CKS-08AS: 30N to 60N
CKS-12AS: 50N to 130N
CKS-16AS: 100N to 250N
CKS-20AS: 150N to 350N
CKS-25AS: 300N to 650N
CKS-32AS: 400N to 1000N
CKSF-50AS: 1000N to 2500N

Parts and Materials

The gripper consists of key components such as body, piston, cylinder cover, link, master (base) jaw, and center cover. Materials used include aluminum, stainless steel, and carbon steel depending on the part. Seals are made of nitrile rubber with specific dimensions per model.

Options and Accessories

Sensors: Non-contact reed switches available in 2-lead or 3-lead configurations, with options for 1 or 2 sensors.
Spring Pushers: Optional 3-point pushers for steady workpiece loading, with specified spring force ranges depending on model.
External Fingers: Design recommendations emphasize minimizing the gap between external fingers and gripper surface to maximize dust resistance.

Design and Usage Recommendations

Reduce clearance between external fingers and gripper surface to enhance dust resistance.
Use appropriate air pressure within 0.2 to 0.7 MPa for optimal performance.
Lubrication is generally not required but turbine oil class 1 (ISOVG32) can be used if needed.
Operating ambient temperature range is 5 to 60°C.

Layout and Installation

Layout drawings are referenced for CAD data and detailed dimensions, including air port locations, jaw stroke, and mounting hole specifications. The grippers have three jaws spaced 120° apart with through holes and specific depth dimensions for air ports and hollow shafts.

Summary

The CKS and CKSF Series Thin Chucks are compact, high-performance pneumatic grippers designed for precision gripping in confined spaces. Their thin profile, simple direct drive mechanism, and customizable options such as sensors and pushers make them versatile for various industrial automation applications. Detailed specifications, performance data, and parts lists support proper selection, installation, and maintenance.

Catalog excerpts

CKS-CKSF Series "Wish the Body Was a Little Thinner..." Is F:"ollw Key Features ■Very thin body Internal cylinders are located on the side toward workpiece, and which makes the motion of the cylinders parallel to jaw. These changes reduces thickness of the gripper by a half for use in confined spaces. ■Simple structure Direct drive mechanism to minimize hooking problem instead of worm drive mechanism. Motion failure caused by lack of grease can be also minimized. ■Large body type and hollow body type available ■Pushers (option) •Workpiece pushers can be additionally mounted (option) •3-point pusher for steady workpiece loading ■How to design external fingers to maximize dust-resistance ability •Please reduce the room between external finger and the gripper surface (as shown on the right) Model Size Quantity Option CKS-08AS with 2 of ET3 non-- contact reed switches and spring pusher (option) Symbol CKS CKSF Sensor, Quantity For option detail For external finger detail ■>2933 Specification Model

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Internal Structure / Parts & Seals ■CKSF-16 to 50AS ■Parts List No. Performance Data ■Grip Force The graph shows grip force in opening and closing with effective external finger lengths £ from gripper cover surface under different air pressure (MPa) Open Closed 1 2 External Finger Length (cm) External Finger Length (cm) 1 2 External Finger Length (cm) External Finger Length (cm) External Finger Length (cm)

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Thin Chuck Layout Drawing ■CKS-08AS （Optimal Grip Force 30N to 60N） ■CKS-16AS （Optimal Grip Force 100N to 250N） 5.5 width across flat ■CKS-12AS （Optimal Grip Force 50N to 130N） CKS-12AS 3 - M 3 × 0 . 5 depth 6 P. C. D. 48 120° (equally divided by 3) ■CKSF-16AS （Optimal Grip Force 100N to 250N） CKSF-16AS Standard through Hollow

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Thin Chuck Layout Drawing ■CKS-20AS （Optimal Grip Force 150N to 350N） ■CKS-25AS （Optimal Grip Force 300N to 650N） ■CKSF-20AS （Optimal Grip Force 150N to 350N） dia. ■CKSF-25AS （Optimal Grip Force 300N to 650N） through Hollow through Hollow depth 5 through 120° (equally divided by 3)

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Thin Chuck Layout Drawing ■CKS-32AS （Optimal Grip Force 400N to 1000N） ■CKSF-50AS （Optimal Grip Force 1000N to 2500N） through Hollow depth 5 through 120°(equally divided by 3) ■CKSF-32AS （Optimal Grip Force 400N to 1000N） CKSF-32AS Standard depth 5 through Hollow depth 5 through 120°(equally divided by 3)

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