SMCs CKZ2N power clamp cylinder conforms to the new NAAMS standard. The rounded cover design and release button with minimal protrusion, reduce weld spatter accumulation. The arm opening angle can be easily changed by replacing the stopper bolt.รก The CKZ2N is available in sizes equivalent to 50, 63 and 80mm bore with arm opening angles ranging from 15and#176;to 135and#176;.